move tools in Documentation/vm/ to tools/vm/
Subsystems (3)
cover move tools in Documentation/vm/ to tools/vm/
Hi all,
3 useful tools (which are more than code examples) in Documentation/vm/
- page-types
- slabinfo
- slqbinfo
are moved to tools/vm/, and page-types is updated to support two new flags.
The tools can be compiled together by
make tools/vm/
Note that checkpatch complains some style problems on slabinfo.c/slqbinfo.c, which are leaved as is.
Thanks,
Fengguang
RFC PATCH 3/4 pagemap: export KPF_HWPOISON
This flag indicates a hardware detected memory corruption on the page. Any future access of the page data may bring down the machine.
CC Andi Kleen <[email protected]>
Signed-off-by Wu Fengguang <[email protected]>
--- Documentation/vm/pagemap.txt | 4 ++++ fs/proc/page.c | 5 +++++ tools/vm/page-types.c | 2 ++ 3 files changed, 11 insertions(+)
fs/proc/page.c +5 -0
@@ -94,6 +94,7 @@ static const struct file_operations proc#define KPF_COMPOUND_TAIL 16#define KPF_HUGE 17#define KPF_UNEVICTABLE 18 +#define KPF_HWPOISON 19#define KPF_NOPAGE 20#define KPF_KSM 21
@@ -180,6 +181,10 @@ static u64 get_uflags(struct page *page) u |=kpf_copy_bit (k,KPF_UNEVICTABLE , PG_unevictable); u |=kpf_copy_bit (k,KPF_MLOCKED , PG_mlocked); +#ifdef CONFIG_MEMORY_FAILURE + u |=kpf_copy_bit (k,KPF_HWPOISON , PG_hwpoison); +#endif +#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR u |=kpf_copy_bit (k,KPF_UNCACHED , PG_uncached);#endif
tools/vm/page-types.c +2 -0
@@ -47,6 +47,7 @@#define KPF_COMPOUND_TAIL 16#define KPF_HUGE 17#define KPF_UNEVICTABLE 18 +#define KPF_HWPOISON 19#define KPF_NOPAGE 20/* [32-] kernel hacking assistances */
@@ -94,6 +95,7 @@ static char *page_flag_names[] = { [KPF_COMPOUND_TAIL] = "T:compound_tail", [KPF_HUGE] = "G:huge", [KPF_UNEVICTABLE] = "u:unevictable", + [KPF_HWPOISON] = "X:hwpoison", [KPF_NOPAGE] = "n:nopage", [KPF_RESERVED] = "r:reserved",
Documentation/vm/pagemap.txt +4 -0
@@ -57,6 +57,7 @@ There are three components to pagemap: 16. COMPOUND_TAIL 16. HUGE 18. UNEVICTABLE + 19. HWPOISON 20. NOPAGE Short descriptions to the page flags:
@@ -86,6 +87,9 @@ Short descriptions to the page flags: 17. HUGE this is an integral part of a HugeTLB page +19. HWPOISON + hardware detected memory corruption on this page: don't touch the data! + 20. NOPAGE no page frame exists at the requested address
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RFC PATCH 4/4 pagemap: document KPF_KSM and show it in page-types
In reply to Wu FengguangIt indicates to the system admin that processes mapping such pages may be eating less physical memory than the reported numbers by legacy tools.
CC Hugh Dickins <[email protected]>
CC Izik Eidus <[email protected]>
Acked-by Chris Wright <[email protected]>
Signed-off-by Wu Fengguang <[email protected]>
--- Documentation/vm/pagemap.txt | 4 ++++ tools/vm/page-types.c | 2 ++ 2 files changed, 6 insertions(+)
Documentation/vm/pagemap.txt +4 -0
@@ -59,6 +59,7 @@ There are three components to pagemap: 18. UNEVICTABLE 19. HWPOISON 20. NOPAGE + 21. KSM Short descriptions to the page flags:
@@ -93,6 +94,9 @@ Short descriptions to the page flags: 20. NOPAGE no page frame exists at the requested address +21. KSM + identical memory pages dynamically shared between one or more processes + [IO related page flags] 1. ERROR IO error occurred 3. UPTODATE page has up-to-date data
tools/vm/page-types.c +2 -0
@@ -49,6 +49,7 @@#define KPF_UNEVICTABLE 18#define KPF_HWPOISON 19#define KPF_NOPAGE 20 +#define KPF_KSM 21/* [32-] kernel hacking assistances */ #define KPF_RESERVED 32
@@ -97,6 +98,7 @@ static char *page_flag_names[] = { [KPF_UNEVICTABLE] = "u:unevictable", [KPF_HWPOISON] = "X:hwpoison", [KPF_NOPAGE] = "n:nopage", + [KPF_KSM] = "x:ksm", [KPF_RESERVED] = "r:reserved", [KPF_MLOCKED] = "m:mlocked",
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RFC PATCH 1/4 page-types: move from Documentation/vm/ to tools/vm/
In reply to Wu FengguangCC Andi Kleen <[email protected]>
CC Josh Triplett <[email protected]>
Acked-by KOSAKI Motohiro <[email protected]>
Signed-off-by Wu Fengguang <[email protected]>
--- Documentation/vm/.gitignore | 1 Documentation/vm/Makefile | 2 Documentation/vm/page-types.c | 698 -------------------------------- Documentation/vm/pagemap.txt | 4 tools/vm/.gitignore | 1 tools/vm/Makefile | 5 tools/vm/page-types.c | 698 ++++++++++++++++++++++++++++++++ 7 files changed, 708 insertions(+), 701 deletions(-)
Documentation/vm/page-types.c deleted +0 -698
@@ -1,698 +0,0 @@ -/* -* page-types: Tool for querying page flags -* -* Copyright (C) 2009 Intel corporation -* Copyright (C) 2009 Wu Fengguang <[email protected]> -*/ - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <stdint.h> -#include <stdarg.h> -#include <string.h> -#include <getopt.h> -#include <limits.h> -#include <sys/types.h> -#include <sys/errno.h> -#include <sys/fcntl.h> - - -/* -* kernel page flags -*/ - -#define KPF_BYTES 8 -#define PROC_KPAGEFLAGS "/proc/kpageflags" - -/* copied from kpageflags_read() */ -#define KPF_LOCKED 0 -#define KPF_ERROR 1 -#define KPF_REFERENCED 2 -#define KPF_UPTODATE 3 -#define KPF_DIRTY 4 -#define KPF_LRU 5 -#define KPF_ACTIVE 6 -#define KPF_SLAB 7 -#define KPF_WRITEBACK 8 -#define KPF_RECLAIM 9 -#define KPF_BUDDY 10 - -/* [11-20] new additions in 2.6.31 */ -#define KPF_MMAP 11 -#define KPF_ANON 12 -#define KPF_SWAPCACHE 13 -#define KPF_SWAPBACKED 14 -#define KPF_COMPOUND_HEAD 15 -#define KPF_COMPOUND_TAIL 16 -#define KPF_HUGE 17 -#define KPF_UNEVICTABLE 18 -#define KPF_NOPAGE 20 - -/* [32-] kernel hacking assistances */ -#define KPF_RESERVED 32 -#define KPF_MLOCKED 33 -#define KPF_MAPPEDTODISK 34 -#define KPF_PRIVATE 35 -#define KPF_PRIVATE_2 36 -#define KPF_OWNER_PRIVATE 37 -#define KPF_ARCH 38 -#define KPF_UNCACHED 39 - -/* [48-] take some arbitrary free slots for expanding overloaded flags -* not part of kernel API -*/ -#define KPF_READAHEAD 48 -#define KPF_SLOB_FREE 49 -#define KPF_SLUB_FROZEN 50 -#define KPF_SLUB_DEBUG 51 - -#define KPF_ALL_BITS ((uint64_t)~0ULL) -#define KPF_HACKERS_BITS (0xffffULL << 32) -#define KPF_OVERLOADED_BITS (0xffffULL << 48) -#define BIT (name) (1ULL << KPF_##name) -#define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) - -static char *page_flag_names[] = { - [KPF_LOCKED ] ="L:locked" , - [KPF_ERROR ] ="E:error" , - [KPF_REFERENCED ] ="R:referenced" , - [KPF_UPTODATE ] ="U:uptodate" , - [KPF_DIRTY ] ="D:dirty" , - [KPF_LRU ] ="l:lru" , - [KPF_ACTIVE ] ="A:active" , - [KPF_SLAB ] ="S:slab" , - [KPF_WRITEBACK ] ="W:writeback" , - [KPF_RECLAIM ] ="I:reclaim" , - [KPF_BUDDY ] ="B:buddy" , - - [KPF_MMAP ] ="M:mmap" , - [KPF_ANON ] ="a:anonymous" , - [KPF_SWAPCACHE ] ="s:swapcache" , - [KPF_SWAPBACKED ] ="b:swapbacked" , - [KPF_COMPOUND_HEAD ] ="H:compound_head" , - [KPF_COMPOUND_TAIL ] ="T:compound_tail" , - [KPF_HUGE ] ="G:huge" , - [KPF_UNEVICTABLE ] ="u:unevictable" , - [KPF_NOPAGE ] ="n:nopage" , - - [KPF_RESERVED ] ="r:reserved" , - [KPF_MLOCKED ] ="m:mlocked" , - [KPF_MAPPEDTODISK ] ="d:mappedtodisk" , - [KPF_PRIVATE ] ="P:private" , - [KPF_PRIVATE_2 ] ="p:private_2" , - [KPF_OWNER_PRIVATE ] ="O:owner_private" , - [KPF_ARCH ] ="h:arch" , - [KPF_UNCACHED ] ="c:uncached" , - - [KPF_READAHEAD ] ="I:readahead" , - [KPF_SLOB_FREE ] ="P:slob_free" , - [KPF_SLUB_FROZEN ] ="A:slub_frozen" , - [KPF_SLUB_DEBUG ] ="E:slub_debug" , -}; - - -/* -* data structures -*/ - -static int opt_raw;/* for kernel developers */ -static int opt_list;/* list pages (in ranges) */ -static int opt_no_summary;/* don't show summary */ -static pid_t opt_pid;/* process to walk */ - -#define MAX_ADDR_RANGES 1024 -static int nr_addr_ranges; -static unsigned long opt_offset[MAX_ADDR_RANGES ]; -static unsigned long opt_size[MAX_ADDR_RANGES ]; - -#define MAX_BIT_FILTERS 64 -static int nr_bit_filters; -static uint64_t opt_mask[MAX_BIT_FILTERS ]; -static uint64_t opt_bits[MAX_BIT_FILTERS ]; - -static int page_size; - -#define PAGES_BATCH (64 << 10)/* 64k pages */ -static int kpageflags_fd; -static uint64_t kpageflags_buf[KPF_BYTES *PAGES_BATCH ]; - -#define HASH_SHIFT 13 -#define HASH_SIZE (1 << HASH_SHIFT) -#define HASH_MASK (HASH_SIZE - 1) -#define HASH_KEY (flags) (flags & HASH_MASK) - -static unsigned long total_pages; -static unsigned long nr_pages[HASH_SIZE ]; -static uint64_t page_flags[HASH_SIZE ]; - - -/* -* helper functions -*/ - -#define ARRAY_SIZE (x) (sizeof(x) / sizeof((x)[0])) - -#define min_t (type, x, y) ({ \ - type __min1 = (x); \ - type __min2 = (y); \ - __min1 < __min2 ? __min1 : __min2; }) - -static unsigned long pages2mb (unsigned long pages) -{ -return (pages * page_size) >>20 ; -} - -static void fatal (const char *x, ...) -{ -va_list ap; - -va_start (ap, x); -vfprintf (stderr, x, ap); -va_end (ap); -exit (EXIT_FAILURE ); -} - - -/* -* page flag names -*/ - -static char *page_flag_name (uint64_t flags) -{ -static char buf[65 ]; -int present; -int i, j; - -for (i =0 , j =0 ; i <ARRAY_SIZE (page_flag_names); i++) { - present = (flags >> i) &1 ; -if (!page_flag_names[i]) { -if (present) -fatal ("unkown flag bit %d\n" , i); -continue ; - } - buf[j++] = present ? page_flag_names[i][0 ] :'_' ; - } - -return buf; -} - -static char *page_flag_longname (uint64_t flags) -{ -static char buf[1024 ]; -int i, n; - -for (i =0 , n =0 ; i <ARRAY_SIZE (page_flag_names); i++) { -if (!page_flag_names[i]) -continue ; -if ((flags >> i) &1 ) - n +=snprintf (buf + n,sizeof (buf) - n,"%s," , - page_flag_names[i] +2 ); - } -if (n) - n--; - buf[n] ='\0' ; - -return buf; -} - - -/* -* page list and summary -*/ - -static void show_page_range (unsigned long offset,uint64_t flags) -{ -static uint64_t flags0; -static unsigned long index; -static unsigned long count; - -if (flags == flags0 && offset == index + count) { - count++; -return ; - } - -if (count) -printf ("%lu\t%lu\t%s\n" , - index, count,page_flag_name (flags0)); - - flags0 = flags; - index = offset; - count =1 ; -} - -static void show_page (unsigned long offset,uint64_t flags) -{ -printf ("%lu\t%s\n" , offset,page_flag_name (flags)); -} - -static void show_summary (void ) -{ -int i; - -printf (" flags\tpage-count MB" -" symbolic-flags\t\t\tlong-symbolic-flags\n" ); - -for (i =0 ; i <ARRAY_SIZE (nr_pages); i++) { -if (nr_pages[i]) -printf ("0x%016llx\t%10lu %8lu %s\t%s\n" , - (unsigned long long )page_flags[i], - nr_pages[i], -pages2mb (nr_pages[i]), -page_flag_name (page_flags[i]), -page_flag_longname (page_flags[i])); - } - -printf (" total\t%10lu %8lu\n" , - total_pages,pages2mb (total_pages)); -} - - -/* -* page flag filters -*/ - -static int bit_mask_ok (uint64_t flags) -{ -int i; - -for (i =0 ; i < nr_bit_filters; i++) { -if (opt_bits[i] ==KPF_ALL_BITS ) { -if ((flags & opt_mask[i]) ==0 ) -return 0 ; - }else { -if ((flags & opt_mask[i]) != opt_bits[i]) -return 0 ; - } - } - -return 1 ; -} - -static uint64_t expand_overloaded_flags (uint64_t flags) -{ -/* SLOB/SLUB overload several page flags */ -if (flags &BIT (SLAB )) { -if (flags &BIT (PRIVATE )) - flags ^=BIT (PRIVATE ) |BIT (SLOB_FREE ); -if (flags &BIT (ACTIVE )) - flags ^=BIT (ACTIVE ) |BIT (SLUB_FROZEN ); -if (flags &BIT (ERROR )) - flags ^=BIT (ERROR ) |BIT (SLUB_DEBUG ); - } - -/* PG_reclaim is overloaded as PG_readahead in the read path */ -if ((flags & (BIT (RECLAIM ) |BIT (WRITEBACK ))) ==BIT (RECLAIM )) - flags ^=BIT (RECLAIM ) |BIT (READAHEAD ); - -return flags; -} - -static uint64_t well_known_flags (uint64_t flags) -{ -/* hide flags intended only for kernel hacker */ - flags &= ~KPF_HACKERS_BITS ; - -/* hide non-hugeTLB compound pages */ -if ((flags &BITS_COMPOUND ) && !(flags &BIT (HUGE ))) - flags &= ~BITS_COMPOUND ; - -return flags; -} - - -/* -* page frame walker -*/ - -static int hash_slot (uint64_t flags) -{ -int k =HASH_KEY (flags); -int i; - -/* Explicitly reserve slot 0 for flags 0: the following logic -* cannot distinguish an unoccupied slot from slot (flags==0). -*/ -if (flags ==0 ) -return 0 ; - -/* search through the remaining (HASH_SIZE-1) slots */ -for (i =1 ; i <ARRAY_SIZE (page_flags); i++, k++) { -if (!k || k >=ARRAY_SIZE (page_flags)) - k =1 ; -if (page_flags[k] ==0 ) { - page_flags[k] = flags; -return k; - } -if (page_flags[k] == flags) -return k; - } - -fatal ("hash table full: bump up HASH_SHIFT?\n" ); -exit (EXIT_FAILURE ); -} - -static void add_page (unsigned long offset,uint64_t flags) -{ - flags =expand_overloaded_flags (flags); - -if (!opt_raw) - flags =well_known_flags (flags); - -if (!bit_mask_ok (flags)) -return ; - -if (opt_list ==1 ) -show_page_range (offset, flags); -else if (opt_list ==2 ) -show_page (offset, flags); - - nr_pages[hash_slot (flags)]++; - total_pages++; -} - -static void walk_pfn (unsigned long index,unsigned long count) -{ -unsigned long batch; -unsigned long n; -unsigned long i; - -if (index >ULONG_MAX /KPF_BYTES ) -fatal ("index overflow: %lu\n" , index); - -lseek (kpageflags_fd, index *KPF_BYTES ,SEEK_SET ); - -while (count) { - batch = min_t(unsigned long, count, PAGES_BATCH); - n =read (kpageflags_fd, kpageflags_buf, batch *KPF_BYTES ); -if (n ==0 ) -break ; -if (n <0 ) { -perror (PROC_KPAGEFLAGS ); -exit (EXIT_FAILURE ); - } - -if (n %KPF_BYTES !=0 ) -fatal ("partial read: %lu bytes\n" , n); - n = n /KPF_BYTES ; - -for (i =0 ; i < n; i++) -add_page (index + i, kpageflags_buf[i]); - - index += batch; - count -= batch; - } -} - -static void walk_addr_ranges (void ) -{ -int i; - - kpageflags_fd =open (PROC_KPAGEFLAGS ,O_RDONLY ); -if (kpageflags_fd <0 ) { -perror (PROC_KPAGEFLAGS ); -exit (EXIT_FAILURE ); - } - -if (!nr_addr_ranges) -walk_pfn (0 ,ULONG_MAX ); - -for (i =0 ; i < nr_addr_ranges; i++) -walk_pfn (opt_offset[i], opt_size[i]); - -close (kpageflags_fd); -} - - -/* -* user interface -*/ - -static const char *page_flag_type (uint64_t flag) -{ -if (flag &KPF_HACKERS_BITS ) -return "(r)" ; -if (flag &KPF_OVERLOADED_BITS ) -return "(o)" ; -return " " ; -} - -static void usage (void ) -{ -int i, j; - -printf ( -"page-types [options]\n" -" -r|--raw Raw mode, for kernel developers\n" -" -a|--addr addr-spec Walk a range of pages\n" -" -b|--bits bits-spec Walk pages with specified bits\n" -#if 0 /* planned features */ -" -p|--pid pid Walk process address space\n" -" -f|--file filename Walk file address space\n" -#endif -" -l|--list Show page details in ranges\n" -" -L|--list-each Show page details one by one\n" -" -N|--no-summary Don't show summay info\n" -" -h|--help Show this usage message\n" -"addr-spec:\n" -" N one page at offset N (unit: pages)\n" -" N+M pages range from N to N+M-1\n" -" N,M pages range from N to M-1\n" -" N, pages range from N to end\n" -" ,M pages range from 0 to M\n" -"bits-spec:\n" -" bit1,bit2 (flags & (bit1|bit2)) != 0\n" -" bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" -" bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" -" =bit1,bit2 flags == (bit1|bit2)\n" -"bit-names:\n" - ); - -for (i =0 , j =0 ; i <ARRAY_SIZE (page_flag_names); i++) { -if (!page_flag_names[i]) -continue ; -printf ("%16s%s" , page_flag_names[i] +2 , -page_flag_type (1ULL << i)); -if (++j >3 ) { - j =0 ; -putchar ('\n' ); - } - } -printf ("\n " -"(r) raw mode bits (o) overloaded bits\n" ); -} - -static unsigned long long parse_number (const char *str) -{ -unsigned long long n; - - n =strtoll (str,NULL ,0 ); - -if (n ==0 && str[0 ] !='0' ) -fatal ("invalid name or number: %s\n" , str); - -return n; -} - -static void parse_pid (const char *str) -{ - opt_pid =parse_number (str); -} - -static void parse_file (const char *name) -{ -} - -static void add_addr_range (unsigned long offset,unsigned long size) -{ -if (nr_addr_ranges >=MAX_ADDR_RANGES ) -fatal ("too much addr ranges\n" ); - - opt_offset[nr_addr_ranges] = offset; - opt_size[nr_addr_ranges] = size; - nr_addr_ranges++; -} - -static void parse_addr_range (const char *optarg) -{ -unsigned long offset; -unsigned long size; -char *p; - - p =strchr (optarg,',' ); -if (!p) - p =strchr (optarg,'+' ); - -if (p == optarg) { - offset =0 ; - size =parse_number (p +1 ); - }else if (p) { - offset =parse_number (optarg); -if (p[1 ] =='\0' ) - size =ULONG_MAX ; -else { - size =parse_number (p +1 ); -if (*p ==',' ) { -if (size < offset) -fatal ("invalid range: %lu,%lu\n" , - offset, size); - size -= offset; - } - } - }else { - offset =parse_number (optarg); - size =1 ; - } - -add_addr_range (offset, size); -} - -static void add_bits_filter (uint64_t mask,uint64_t bits) -{ -if (nr_bit_filters >=MAX_BIT_FILTERS ) -fatal ("too much bit filters\n" ); - - opt_mask[nr_bit_filters] = mask; - opt_bits[nr_bit_filters] = bits; - nr_bit_filters++; -} - -static uint64_t parse_flag_name (const char *str,int len) -{ -int i; - -if (!*str || !len) -return 0 ; - -if (len <=8 && !strncmp (str,"compound" , len)) -return BITS_COMPOUND ; - -for (i =0 ; i <ARRAY_SIZE (page_flag_names); i++) { -if (!page_flag_names[i]) -continue ; -if (!strncmp (str, page_flag_names[i] +2 , len)) -return 1ULL << i; - } - -return parse_number (str); -} - -static uint64_t parse_flag_names (const char *str,int all) -{ -const char *p = str; -uint64_t flags =0 ; - -while (1 ) { -if (*p ==',' || *p =='=' || *p =='\0' ) { -if ((*str !='~' ) || (*str =='~' && all && *++str)) - flags |=parse_flag_name (str, p - str); -if (*p !=',' ) -break ; - str = p +1 ; - } - p++; - } - -return flags; -} - -static void parse_bits_mask (const char *optarg) -{ -uint64_t mask; -uint64_t bits; -const char *p; - - p =strchr (optarg,'=' ); -if (p == optarg) { - mask =KPF_ALL_BITS ; - bits =parse_flag_names (p +1 ,0 ); - }else if (p) { - mask =parse_flag_names (optarg,0 ); - bits =parse_flag_names (p +1 ,0 ); - }else if (strchr (optarg,'~' )) { - mask =parse_flag_names (optarg,1 ); - bits =parse_flag_names (optarg,0 ); - }else { - mask =parse_flag_names (optarg,0 ); - bits =KPF_ALL_BITS ; - } - -add_bits_filter (mask, bits); -} - - -static struct option opts[] = { - {"raw" ,0 ,NULL ,'r' }, - {"pid" ,1 ,NULL ,'p' }, - {"file" ,1 ,NULL ,'f' }, - {"addr" ,1 ,NULL ,'a' }, - {"bits" ,1 ,NULL ,'b' }, - {"list" ,0 ,NULL ,'l' }, - {"list-each" ,0 ,NULL ,'L' }, - {"no-summary" ,0 ,NULL ,'N' }, - {"help" ,0 ,NULL ,'h' }, - {NULL ,0 ,NULL ,0 } -}; - -int main (int argc,char *argv[]) -{ -int c; - - page_size =getpagesize (); - -while ((c =getopt_long (argc, argv, -"rp:f:a:b:lLNh" , opts,NULL )) !=-1 ) { -switch (c) { -case 'r' : - opt_raw =1 ; -break ; -case 'p' : -parse_pid (optarg); -break ; -case 'f' : -parse_file (optarg); -break ; -case 'a' : -parse_addr_range (optarg); -break ; -case 'b' : -parse_bits_mask (optarg); -break ; -case 'l' : - opt_list =1 ; -break ; -case 'L' : - opt_list =2 ; -break ; -case 'N' : - opt_no_summary =1 ; -break ; -case 'h' : -usage (); -exit (0 ); -default : -usage (); -exit (1 ); - } - } - -if (opt_list ==1 ) -printf ("offset\tcount\tflags\n" ); -if (opt_list ==2 ) -printf ("offset\tflags\n" ); - -walk_addr_ranges (); - -if (opt_list ==1 ) -show_page_range (0 ,0 );/* drain the buffer */ - -if (opt_no_summary) -return 0 ; - -if (opt_list) -printf ("\n\n" ); - -show_summary (); - -return 0 ; -}
tools/vm/page-types.c new file +698 -0
698 lines not on this page · raw message
Documentation/vm/.gitignore +0 -1
@@ -1,2 +1 @@ -page-types slabinfo
tools/vm/.gitignore new file +1 -0
@@ -0,0 +1 @@ +page-types
Documentation/vm/Makefile +1 -1
@@ -2,7 +2,7 @@ obj- := dummy.o # List of programs to build -hostprogs-y := slabinfo page-types +hostprogs-y := slabinfo # Tell kbuild to always build the programs always := $(hostprogs-y)
tools/vm/Makefile new file +5 -0
@@ -0,0 +1,5 @@ +# List of programs to build +hostprogs-y := page-types + +# Tell kbuild to always build the programs +always := $(hostprogs-y)
Documentation/vm/pagemap.txt +3 -1
@@ -110,7 +110,9 @@ Short descriptions to the page flags: 13. SWAPCACHE page is mapped to swap space, ie. has an associated swap entry 14. SWAPBACKED page is backed by swap/RAM -The page-types tool in this directory can be used to query the above flags. +The page-types tool can be used to query the above flags: + + gcc -o page-types tools/vm/page-types.c Using pagemap to do something useful:
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-- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to [email protected]. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"[email protected]"> [email protected] </a>
RFC PATCH 2/4 slabinfo: move from Documentation/vm/ to tools/vm/
In reply to Wu FengguangCC Lin Ming <[email protected]>
CC Nick Piggin <[email protected]>
CC Christoph Lameter <[email protected]>
Signed-off-by Wu Fengguang <[email protected]>
--- Documentation/vm/.gitignore | 1 Documentation/vm/Makefile | 8 Documentation/vm/slabinfo.c | 1364 ---------------------------------- Documentation/vm/slqbinfo.c | 1047 -------------------------- Documentation/vm/slub.txt | 2 tools/vm/.gitignore | 2 tools/vm/Makefile | 2 tools/vm/slabinfo.c | 1364 ++++++++++++++++++++++++++++++++++ tools/vm/slqbinfo.c | 1047 ++++++++++++++++++++++++++ 9 files changed, 2415 insertions(+), 2422 deletions(-)
Documentation/vm/slabinfo.c deleted +0 -1364
@@ -1,1364 +0,0 @@ -/* -* Slabinfo: Tool to get reports about slabs -* -* (C) 2007 sgi, Christoph Lameter -* -* Compile by: -* -* gcc -o slabinfo slabinfo.c -*/ -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <dirent.h> -#include <strings.h> -#include <string.h> -#include <unistd.h> -#include <stdarg.h> -#include <getopt.h> -#include <regex.h> -#include <errno.h> - -#define MAX_SLABS 500 -#define MAX_ALIASES 500 -#define MAX_NODES 1024 - -struct slabinfo { -char *name; -int alias; -int refs; -int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu; -int hwcache_align, object_size, objs_per_slab; -int sanity_checks, slab_size, store_user, trace; -int order, poison, reclaim_account, red_zone; -unsigned long partial, objects, slabs, objects_partial, objects_total; -unsigned long alloc_fastpath, alloc_slowpath; -unsigned long free_fastpath, free_slowpath; -unsigned long free_frozen, free_add_partial, free_remove_partial; -unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill; -unsigned long cpuslab_flush, deactivate_full, deactivate_empty; -unsigned long deactivate_to_head, deactivate_to_tail; -unsigned long deactivate_remote_frees, order_fallback; -int numa[MAX_NODES ]; -int numa_partial[MAX_NODES ]; -} slabinfo[MAX_SLABS ]; - -struct aliasinfo { -char *name; -char *ref; -struct slabinfo *slab; -} aliasinfo[MAX_ALIASES ]; - -int slabs =0 ; -int actual_slabs =0 ; -int aliases =0 ; -int alias_targets =0 ; -int highest_node =0 ; - -char buffer[4096 ]; - -int show_empty =0 ; -int show_report =0 ; -int show_alias =0 ; -int show_slab =0 ; -int skip_zero =1 ; -int show_numa =0 ; -int show_track =0 ; -int show_first_alias =0 ; -int validate =0 ; -int shrink =0 ; -int show_inverted =0 ; -int show_single_ref =0 ; -int show_totals =0 ; -int sort_size =0 ; -int sort_active =0 ; -int set_debug =0 ; -int show_ops =0 ; -int show_activity =0 ; - -/* Debug options */ -int sanity =0 ; -int redzone =0 ; -int poison =0 ; -int tracking =0 ; -int tracing =0 ; - -int page_size; - -regex_t pattern; - -static void fatal (const char *x, ...) -{ -va_list ap; - -va_start (ap, x); -vfprintf (stderr, x, ap); -va_end (ap); -exit (EXIT_FAILURE ); -} - -static void usage (void ) -{ -printf ("slabinfo 5/7/2007. (c) 2007 sgi.\n\n" -"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n" -"-a|--aliases Show aliases\n" -"-A|--activity Most active slabs first\n" -"-d<options>|--debug=<options> Set/Clear Debug options\n" -"-D|--display-active Switch line format to activity\n" -"-e|--empty Show empty slabs\n" -"-f|--first-alias Show first alias\n" -"-h|--help Show usage information\n" -"-i|--inverted Inverted list\n" -"-l|--slabs Show slabs\n" -"-n|--numa Show NUMA information\n" -"-o|--ops Show kmem_cache_ops\n" -"-s|--shrink Shrink slabs\n" -"-r|--report Detailed report on single slabs\n" -"-S|--Size Sort by size\n" -"-t|--tracking Show alloc/free information\n" -"-T|--Totals Show summary information\n" -"-v|--validate Validate slabs\n" -"-z|--zero Include empty slabs\n" -"-1|--1ref Single reference\n" -"\nValid debug options (FZPUT may be combined)\n" -"a / A Switch on all debug options (=FZUP)\n" -"- Switch off all debug options\n" -"f / F Sanity Checks (SLAB_DEBUG_FREE)\n" -"z / Z Redzoning\n" -"p / P Poisoning\n" -"u / U Tracking\n" -"t / T Tracing\n" - ); -} - -static unsigned long read_obj (const char *name) -{ -FILE *f =fopen (name,"r" ); - -if (!f) - buffer[0 ] =0 ; -else { -if (!fgets (buffer,sizeof (buffer), f)) - buffer[0 ] =0 ; -fclose (f); -if (buffer[strlen (buffer)] =='\n' ) - buffer[strlen (buffer)] =0 ; - } -return strlen (buffer); -} - - -/* -* Get the contents of an attribute -*/ -static unsigned long get_obj (const char *name) -{ -if (!read_obj (name)) -return 0 ; - -return atol (buffer); -} - -static unsigned long get_obj_and_str (const char *name,char **x) -{ -unsigned long result =0 ; -char *p; - - *x =NULL ; - -if (!read_obj (name)) { - x =NULL ; -return 0 ; - } - result =strtoul (buffer, &p,10 ); -while (*p ==' ' ) - p++; -if (*p) - *x =strdup (p); -return result; -} - -static void set_obj (struct slabinfo *s,const char *name,int n) -{ -char x[100 ]; -FILE *f; - -snprintf (x,100 ,"%s/%s" , s->name, name); - f =fopen (x,"w" ); -if (!f) -fatal ("Cannot write to %s\n" , x); - -fprintf (f,"%d\n" , n); -fclose (f); -} - -static unsigned long read_slab_obj (struct slabinfo *s,const char *name) -{ -char x[100 ]; -FILE *f; -size_t l; - -snprintf (x,100 ,"%s/%s" , s->name, name); - f =fopen (x,"r" ); -if (!f) { - buffer[0 ] =0 ; - l =0 ; - }else { - l =fread (buffer,1 ,sizeof (buffer), f); - buffer[l] =0 ; -fclose (f); - } -return l; -} - - -/* -* Put a size string together -*/ -static int store_size (char *buffer,unsigned long value) -{ -unsigned long divisor =1 ; -char trailer =0 ; -int n; - -if (value >1000000000UL ) { - divisor =100000000UL ; - trailer ='G' ; - }else if (value >1000000UL ) { - divisor =100000UL ; - trailer ='M' ; - }else if (value >1000UL ) { - divisor =100 ; - trailer ='K' ; - } - - value /= divisor; - n =sprintf (buffer,"%ld" ,value); -if (trailer) { - buffer[n] = trailer; - n++; - buffer[n] =0 ; - } -if (divisor !=1 ) { -memmove (buffer + n -2 , buffer + n -3 ,4 ); - buffer[n-2 ] ='.' ; - n++; - } -return n; -} - -static void decode_numa_list (int *numa,char *t) -{ -int node; -int nr; - -memset (numa,0 ,MAX_NODES *sizeof (int )); - -if (!t) -return ; - -while (*t =='N' ) { - t++; - node =strtoul (t, &t,10 ); -if (*t =='=' ) { - t++; - nr =strtoul (t, &t,10 ); - numa[node] = nr; -if (node > highest_node) - highest_node = node; - } -while (*t ==' ' ) - t++; - } -} - -static void slab_validate (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -set_obj (s,"validate" ,1 ); -} - -static void slab_shrink (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -set_obj (s,"shrink" ,1 ); -} - -int line =0 ; - -static void first_line (void ) -{ -if (show_activity) -printf ("Name Objects Alloc Free %%Fast Fallb O\n" ); -else -printf ("Name Objects Objsize Space " -"Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n" ); -} - -/* -* Find the shortest alias of a slab -*/ -static struct aliasinfo *find_one_alias (struct slabinfo *find) -{ -struct aliasinfo *a; -struct aliasinfo *best =NULL ; - -for (a = aliasinfo;a < aliasinfo + aliases; a++) { -if (a->slab == find && - (!best ||strlen (best->name) <strlen (a->name))) { - best = a; -if (strncmp (a->name,"kmall" ,5 ) ==0 ) -return best; - } - } -return best; -} - -static unsigned long slab_size (struct slabinfo *s) -{ -return s->slabs * (page_size << s->order); -} - -static unsigned long slab_activity (struct slabinfo *s) -{ -return s->alloc_fastpath + s->free_fastpath + - s->alloc_slowpath + s->free_slowpath; -} - -static void slab_numa (struct slabinfo *s,int mode) -{ -int node; - -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (!highest_node) { -printf ("\n%s: No NUMA information available.\n" , s->name); -return ; - } - -if (skip_zero && !s->slabs) -return ; - -if (!line) { -printf ("\n%-21s:" , mode ?"NUMA nodes" :"Slab" ); -for (node =0 ; node <= highest_node; node++) -printf (" %4d" , node); -printf ("\n----------------------" ); -for (node =0 ; node <= highest_node; node++) -printf ("-----" ); -printf ("\n" ); - } -printf ("%-21s " , mode ?"All slabs" : s->name); -for (node =0 ; node <= highest_node; node++) { -char b[20 ]; - -store_size (b, s->numa[node]); -printf (" %4s" , b); - } -printf ("\n" ); -if (mode) { -printf ("%-21s " ,"Partial slabs" ); -for (node =0 ; node <= highest_node; node++) { -char b[20 ]; - -store_size (b, s->numa_partial[node]); -printf (" %4s" , b); - } -printf ("\n" ); - } - line++; -} - -static void show_tracking (struct slabinfo *s) -{ -printf ("\n%s: Kernel object allocation\n" , s->name); -printf ("-----------------------------------------------------------------------\n" ); -if (read_slab_obj (s,"alloc_calls" )) -printf (buffer); -else -printf ("No Data\n" ); - -printf ("\n%s: Kernel object freeing\n" , s->name); -printf ("------------------------------------------------------------------------\n" ); -if (read_slab_obj (s,"free_calls" )) -printf (buffer); -else -printf ("No Data\n" ); - -} - -static void ops (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (read_slab_obj (s,"ops" )) { -printf ("\n%s: kmem_cache operations\n" , s->name); -printf ("--------------------------------------------\n" ); -printf (buffer); - }else -printf ("\n%s has no kmem_cache operations\n" , s->name); -} - -static const char *onoff (int x) -{ -if (x) -return "On " ; -return "Off" ; -} - -static void slab_stats (struct slabinfo *s) -{ -unsigned long total_alloc; -unsigned long total_free; -unsigned long total; - -if (!s->alloc_slab) -return ; - - total_alloc = s->alloc_fastpath + s->alloc_slowpath; - total_free = s->free_fastpath + s->free_slowpath; - -if (!total_alloc) -return ; - -printf ("\n" ); -printf ("Slab Perf Counter Alloc Free %%Al %%Fr\n" ); -printf ("--------------------------------------------------\n" ); -printf ("Fastpath %8lu %8lu %3lu %3lu\n" , - s->alloc_fastpath, s->free_fastpath, - s->alloc_fastpath *100 / total_alloc, - s->free_fastpath *100 / total_free); -printf ("Slowpath %8lu %8lu %3lu %3lu\n" , - total_alloc - s->alloc_fastpath, s->free_slowpath, - (total_alloc - s->alloc_fastpath) *100 / total_alloc, - s->free_slowpath *100 / total_free); -printf ("Page Alloc %8lu %8lu %3lu %3lu\n" , - s->alloc_slab, s->free_slab, - s->alloc_slab *100 / total_alloc, - s->free_slab *100 / total_free); -printf ("Add partial %8lu %8lu %3lu %3lu\n" , - s->deactivate_to_head + s->deactivate_to_tail, - s->free_add_partial, - (s->deactivate_to_head + s->deactivate_to_tail) *100 / total_alloc, - s->free_add_partial *100 / total_free); -printf ("Remove partial %8lu %8lu %3lu %3lu\n" , - s->alloc_from_partial, s->free_remove_partial, - s->alloc_from_partial *100 / total_alloc, - s->free_remove_partial *100 / total_free); - -printf ("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n" , - s->deactivate_remote_frees, s->free_frozen, - s->deactivate_remote_frees *100 / total_alloc, - s->free_frozen *100 / total_free); - -printf ("Total %8lu %8lu\n\n" , total_alloc, total_free); - -if (s->cpuslab_flush) -printf ("Flushes %8lu\n" , s->cpuslab_flush); - -if (s->alloc_refill) -printf ("Refill %8lu\n" , s->alloc_refill); - - total = s->deactivate_full + s->deactivate_empty + - s->deactivate_to_head + s->deactivate_to_tail; - -if (total) -printf ("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) " -"ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n" , - s->deactivate_full, (s->deactivate_full *100 ) / total, - s->deactivate_empty, (s->deactivate_empty *100 ) / total, - s->deactivate_to_head, (s->deactivate_to_head *100 ) / total, - s->deactivate_to_tail, (s->deactivate_to_tail *100 ) / total); -} - -static void report (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -printf ("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n" , - s->name, s->aliases, s->order, s->objects); -if (s->hwcache_align) -printf ("** Hardware cacheline aligned\n" ); -if (s->cache_dma) -printf ("** Memory is allocated in a special DMA zone\n" ); -if (s->destroy_by_rcu) -printf ("** Slabs are destroyed via RCU\n" ); -if (s->reclaim_account) -printf ("** Reclaim accounting active\n" ); - -printf ("\nSizes (bytes) Slabs Debug Memory\n" ); -printf ("------------------------------------------------------------------------\n" ); -printf ("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n" , - s->object_size, s->slabs,onoff (s->sanity_checks), - s->slabs * (page_size << s->order)); -printf ("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n" , - s->slab_size, s->slabs - s->partial - s->cpu_slabs, -onoff (s->red_zone), s->objects * s->object_size); -printf ("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n" , - page_size << s->order, s->partial,onoff (s->poison), - s->slabs * (page_size << s->order) - s->objects * s->object_size); -printf ("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n" , - s->slab_size - s->object_size, s->cpu_slabs,onoff (s->store_user), - (s->slab_size - s->object_size) * s->objects); -printf ("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n" , - s->align, s->objs_per_slab,onoff (s->trace), - ((page_size << s->order) - s->objs_per_slab * s->slab_size) * - s->slabs); - -ops (s); -show_tracking (s); -slab_numa (s,1 ); -slab_stats (s); -} - -static void slabcache (struct slabinfo *s) -{ -char size_str[20 ]; -char dist_str[40 ]; -char flags[20 ]; -char *p = flags; - -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (actual_slabs ==1 ) { -report (s); -return ; - } - -if (skip_zero && !show_empty && !s->slabs) -return ; - -if (show_empty && s->slabs) -return ; - -store_size (size_str,slab_size (s)); -snprintf (dist_str,40 ,"%lu/%lu/%d" , s->slabs - s->cpu_slabs, - s->partial, s->cpu_slabs); - -if (!line++) -first_line (); - -if (s->aliases) - *p++ ='*' ; -if (s->cache_dma) - *p++ ='d' ; -if (s->hwcache_align) - *p++ ='A' ; -if (s->poison) - *p++ ='P' ; -if (s->reclaim_account) - *p++ ='a' ; -if (s->red_zone) - *p++ ='Z' ; -if (s->sanity_checks) - *p++ ='F' ; -if (s->store_user) - *p++ ='U' ; -if (s->trace) - *p++ ='T' ; - - *p =0 ; -if (show_activity) { -unsigned long total_alloc; -unsigned long total_free; - - total_alloc = s->alloc_fastpath + s->alloc_slowpath; - total_free = s->free_fastpath + s->free_slowpath; - -printf ("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n" , - s->name, s->objects, - total_alloc, total_free, - total_alloc ? (s->alloc_fastpath *100 / total_alloc) :0 , - total_free ? (s->free_fastpath *100 / total_free) :0 , - s->order_fallback, s->order); - } -else -printf ("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n" , - s->name, s->objects, s->object_size, size_str, dist_str, - s->objs_per_slab, s->order, - s->slabs ? (s->partial *100 ) / s->slabs :100 , - s->slabs ? (s->objects * s->object_size *100 ) / - (s->slabs * (page_size << s->order)) :100 , - flags); -} - -/* -* Analyze debug options. Return false if something is amiss. -*/ -static int debug_opt_scan (char *opt) -{ -if (!opt || !opt[0 ] ||strcmp (opt,"-" ) ==0 ) -return 1 ; - -if (strcasecmp (opt,"a" ) ==0 ) { - sanity =1 ; - poison =1 ; - redzone =1 ; - tracking =1 ; -return 1 ; - } - -for ( ; *opt; opt++) -switch (*opt) { -case 'F' :case 'f' : -if (sanity) -return 0 ; - sanity =1 ; -break ; -case 'P' :case 'p' : -if (poison) -return 0 ; - poison =1 ; -break ; - -case 'Z' :case 'z' : -if (redzone) -return 0 ; - redzone =1 ; -break ; - -case 'U' :case 'u' : -if (tracking) -return 0 ; - tracking =1 ; -break ; - -case 'T' :case 't' : -if (tracing) -return 0 ; - tracing =1 ; -break ; -default : -return 0 ; - } -return 1 ; -} - -static int slab_empty (struct slabinfo *s) -{ -if (s->objects >0 ) -return 0 ; - -/* -* We may still have slabs even if there are no objects. Shrinking will -* remove them. -*/ -if (s->slabs !=0 ) -set_obj (s,"shrink" ,1 ); - -return 1 ; -} - -static void slab_debug (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (sanity && !s->sanity_checks) { -set_obj (s,"sanity" ,1 ); - } -if (!sanity && s->sanity_checks) { -if (slab_empty (s)) -set_obj (s,"sanity" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable sanity checks\n" , s->name); - } -if (redzone && !s->red_zone) { -if (slab_empty (s)) -set_obj (s,"red_zone" ,1 ); -else -fprintf (stderr,"%s not empty cannot enable redzoning\n" , s->name); - } -if (!redzone && s->red_zone) { -if (slab_empty (s)) -set_obj (s,"red_zone" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable redzoning\n" , s->name); - } -if (poison && !s->poison) { -if (slab_empty (s)) -set_obj (s,"poison" ,1 ); -else -fprintf (stderr,"%s not empty cannot enable poisoning\n" , s->name); - } -if (!poison && s->poison) { -if (slab_empty (s)) -set_obj (s,"poison" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable poisoning\n" , s->name); - } -if (tracking && !s->store_user) { -if (slab_empty (s)) -set_obj (s,"store_user" ,1 ); -else -fprintf (stderr,"%s not empty cannot enable tracking\n" , s->name); - } -if (!tracking && s->store_user) { -if (slab_empty (s)) -set_obj (s,"store_user" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable tracking\n" , s->name); - } -if (tracing && !s->trace) { -if (slabs ==1 ) -set_obj (s,"trace" ,1 ); -else -fprintf (stderr,"%s can only enable trace for one slab at a time\n" , s->name); - } -if (!tracing && s->trace) -set_obj (s,"trace" ,1 ); -} - -static void totals (void ) -{ -struct slabinfo *s; - -int used_slabs =0 ; -char b1[20 ], b2[20 ], b3[20 ], b4[20 ]; -unsigned long long max =1ULL <<63 ; - -/* Object size */ -unsigned long long min_objsize = max, max_objsize =0 , avg_objsize; - -/* Number of partial slabs in a slabcache */ -unsigned long long min_partial = max, max_partial =0 , - avg_partial, total_partial =0 ; - -/* Number of slabs in a slab cache */ -unsigned long long min_slabs = max, max_slabs =0 , - avg_slabs, total_slabs =0 ; - -/* Size of the whole slab */ -unsigned long long min_size = max, max_size =0 , - avg_size, total_size =0 ; - -/* Bytes used for object storage in a slab */ -unsigned long long min_used = max, max_used =0 , - avg_used, total_used =0 ; - -/* Waste: Bytes used for alignment and padding */ -unsigned long long min_waste = max, max_waste =0 , - avg_waste, total_waste =0 ; -/* Number of objects in a slab */ -unsigned long long min_objects = max, max_objects =0 , - avg_objects, total_objects =0 ; -/* Waste per object */ -unsigned long long min_objwaste = max, - max_objwaste =0 , avg_objwaste, - total_objwaste =0 ; - -/* Memory per object */ -unsigned long long min_memobj = max, - max_memobj =0 , avg_memobj, - total_objsize =0 ; - -/* Percentage of partial slabs per slab */ -unsigned long min_ppart =100 , max_ppart =0 , - avg_ppart, total_ppart =0 ; - -/* Number of objects in partial slabs */ -unsigned long min_partobj = max, max_partobj =0 , - avg_partobj, total_partobj =0 ; - -/* Percentage of partial objects of all objects in a slab */ -unsigned long min_ppartobj =100 , max_ppartobj =0 , - avg_ppartobj, total_ppartobj =0 ; - - -for (s = slabinfo; s < slabinfo + slabs; s++) { -unsigned long long size; -unsigned long used; -unsigned long long wasted; -unsigned long long objwaste; -unsigned long percentage_partial_slabs; -unsigned long percentage_partial_objs; - -if (!s->slabs || !s->objects) -continue ; - - used_slabs++; - - size =slab_size (s); - used = s->objects * s->object_size; - wasted = size - used; - objwaste = s->slab_size - s->object_size; - - percentage_partial_slabs = s->partial *100 / s->slabs; -if (percentage_partial_slabs >100 ) - percentage_partial_slabs =100 ; - - percentage_partial_objs = s->objects_partial *100 - / s->objects; - -if (percentage_partial_objs >100 ) - percentage_partial_objs =100 ; - -if (s->object_size < min_objsize) - min_objsize = s->object_size; -if (s->partial < min_partial) - min_partial = s->partial; -if (s->slabs < min_slabs) - min_slabs = s->slabs; -if (size < min_size) - min_size = size; -if (wasted < min_waste) - min_waste = wasted; -if (objwaste < min_objwaste) - min_objwaste = objwaste; -if (s->objects < min_objects) - min_objects = s->objects; -if (used < min_used) - min_used = used; -if (s->objects_partial < min_partobj) - min_partobj = s->objects_partial; -if (percentage_partial_slabs < min_ppart) - min_ppart = percentage_partial_slabs; -if (percentage_partial_objs < min_ppartobj) - min_ppartobj = percentage_partial_objs; -if (s->slab_size < min_memobj) - min_memobj = s->slab_size; - -if (s->object_size > max_objsize) - max_objsize = s->object_size; -if (s->partial > max_partial) - max_partial = s->partial; -if (s->slabs > max_slabs) - max_slabs = s->slabs; -if (size > max_size) - max_size = size; -if (wasted > max_waste) - max_waste = wasted; -if (objwaste > max_objwaste) - max_objwaste = objwaste; -if (s->objects > max_objects) - max_objects = s->objects; -if (used > max_used) - max_used = used; -if (s->objects_partial > max_partobj) - max_partobj = s->objects_partial; -if (percentage_partial_slabs > max_ppart) - max_ppart = percentage_partial_slabs; -if (percentage_partial_objs > max_ppartobj) - max_ppartobj = percentage_partial_objs; -if (s->slab_size > max_memobj) - max_memobj = s->slab_size; - - total_partial += s->partial; - total_slabs += s->slabs; - total_size += size; - total_waste += wasted; - - total_objects += s->objects; - total_used += used; - total_partobj += s->objects_partial; - total_ppart += percentage_partial_slabs; - total_ppartobj += percentage_partial_objs; - - total_objwaste += s->objects * objwaste; - total_objsize += s->objects * s->slab_size; - } - -if (!total_objects) { -printf ("No objects\n" ); -return ; - } -if (!used_slabs) { -printf ("No slabs\n" ); -return ; - } - -/* Per slab averages */ - avg_partial = total_partial / used_slabs; - avg_slabs = total_slabs / used_slabs; - avg_size = total_size / used_slabs; - avg_waste = total_waste / used_slabs; - - avg_objects = total_objects / used_slabs; - avg_used = total_used / used_slabs; - avg_partobj = total_partobj / used_slabs; - avg_ppart = total_ppart / used_slabs; - avg_ppartobj = total_ppartobj / used_slabs; - -/* Per object object sizes */ - avg_objsize = total_used / total_objects; - avg_objwaste = total_objwaste / total_objects; - avg_partobj = total_partobj *100 / total_objects; - avg_memobj = total_objsize / total_objects; - -printf ("Slabcache Totals\n" ); -printf ("----------------\n" ); -printf ("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n" , - slabs, aliases, alias_targets, used_slabs); - -store_size (b1, total_size);store_size (b2, total_waste); -store_size (b3, total_waste *100 / total_used); -printf ("Memory used: %6s # Loss : %6s MRatio:%6s%%\n" , b1, b2, b3); - -store_size (b1, total_objects);store_size (b2, total_partobj); -store_size (b3, total_partobj *100 / total_objects); -printf ("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n" , b1, b2, b3); - -printf ("\n" ); -printf ("Per Cache Average Min Max Total\n" ); -printf ("---------------------------------------------------------\n" ); - -store_size (b1, avg_objects);store_size (b2, min_objects); -store_size (b3, max_objects);store_size (b4, total_objects); -printf ("#Objects %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_slabs);store_size (b2, min_slabs); -store_size (b3, max_slabs);store_size (b4, total_slabs); -printf ("#Slabs %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_partial);store_size (b2, min_partial); -store_size (b3, max_partial);store_size (b4, total_partial); -printf ("#PartSlab %10s %10s %10s %10s\n" , - b1, b2, b3, b4); -store_size (b1, avg_ppart);store_size (b2, min_ppart); -store_size (b3, max_ppart); -store_size (b4, total_partial *100 / total_slabs); -printf ("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n" , - b1, b2, b3, b4); - -store_size (b1, avg_partobj);store_size (b2, min_partobj); -store_size (b3, max_partobj); -store_size (b4, total_partobj); -printf ("PartObjs %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_ppartobj);store_size (b2, min_ppartobj); -store_size (b3, max_ppartobj); -store_size (b4, total_partobj *100 / total_objects); -printf ("%% PartObj%10s%% %10s%% %10s%% %10s%%\n" , - b1, b2, b3, b4); - -store_size (b1, avg_size);store_size (b2, min_size); -store_size (b3, max_size);store_size (b4, total_size); -printf ("Memory %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_used);store_size (b2, min_used); -store_size (b3, max_used);store_size (b4, total_used); -printf ("Used %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_waste);store_size (b2, min_waste); -store_size (b3, max_waste);store_size (b4, total_waste); -printf ("Loss %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -printf ("\n" ); -printf ("Per Object Average Min Max\n" ); -printf ("---------------------------------------------\n" ); - -store_size (b1, avg_memobj);store_size (b2, min_memobj); -store_size (b3, max_memobj); -printf ("Memory %10s %10s %10s\n" , - b1, b2, b3); -store_size (b1, avg_objsize);store_size (b2, min_objsize); -store_size (b3, max_objsize); -printf ("User %10s %10s %10s\n" , - b1, b2, b3); - -store_size (b1, avg_objwaste);store_size (b2, min_objwaste); -store_size (b3, max_objwaste); -printf ("Loss %10s %10s %10s\n" , - b1, b2, b3); -} - -static void sort_slabs (void ) -{ -struct slabinfo *s1,*s2; - -for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) { -for (s2 = s1 +1 ; s2 < slabinfo + slabs; s2++) { -int result; - -if (sort_size) - result =slab_size (s1) <slab_size (s2); -else if (sort_active) - result =slab_activity (s1) <slab_activity (s2); -else - result =strcasecmp (s1->name, s2->name); - -if (show_inverted) - result = -result; - -if (result >0 ) { -struct slabinfo t; - -memcpy (&t, s1,sizeof (struct slabinfo )); -memcpy (s1, s2,sizeof (struct slabinfo )); -memcpy (s2, &t,sizeof (struct slabinfo )); - } - } - } -} - -static void sort_aliases (void ) -{ -struct aliasinfo *a1,*a2; - -for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) { -for (a2 = a1 +1 ; a2 < aliasinfo + aliases; a2++) { -char *n1, *n2; - - n1 = a1->name; - n2 = a2->name; -if (show_alias && !show_inverted) { - n1 = a1->ref; - n2 = a2->ref; - } -if (strcasecmp (n1, n2) >0 ) { -struct aliasinfo t; - -memcpy (&t, a1,sizeof (struct aliasinfo )); -memcpy (a1, a2,sizeof (struct aliasinfo )); -memcpy (a2, &t,sizeof (struct aliasinfo )); - } - } - } -} - -static void link_slabs (void ) -{ -struct aliasinfo *a; -struct slabinfo *s; - -for (a = aliasinfo; a < aliasinfo + aliases; a++) { - -for (s = slabinfo; s < slabinfo + slabs; s++) -if (strcmp (a->ref, s->name) ==0 ) { - a->slab = s; - s->refs++; -break ; - } -if (s == slabinfo + slabs) -fatal ("Unresolved alias %s\n" , a->ref); - } -} - -static void alias (void ) -{ -struct aliasinfo *a; -char *active =NULL ; - -sort_aliases (); -link_slabs (); - -for (a = aliasinfo; a < aliasinfo + aliases; a++) { - -if (!show_single_ref && a->slab->refs ==1 ) -continue ; - -if (!show_inverted) { -if (active) { -if (strcmp (a->slab->name, active) ==0 ) { -printf (" %s" , a->name); -continue ; - } - } -printf ("\n%-12s <- %s" , a->slab->name, a->name); - active = a->slab->name; - } -else -printf ("%-20s -> %s\n" , a->name, a->slab->name); - } -if (active) -printf ("\n" ); -} - - -static void rename_slabs (void ) -{ -struct slabinfo *s; -struct aliasinfo *a; - -for (s = slabinfo; s < slabinfo + slabs; s++) { -if (*s->name !=':' ) -continue ; - -if (s->refs >1 && !show_first_alias) -continue ; - - a =find_one_alias (s); - -if (a) - s->name = a->name; -else { - s->name ="*" ; - actual_slabs--; - } - } -} - -static int slab_mismatch (char *slab) -{ -return regexec (&pattern, slab,0 ,NULL ,0 ); -} - -static void read_slab_dir (void ) -{ -DIR *dir; -struct dirent *de; -struct slabinfo *slab = slabinfo; -struct aliasinfo *alias = aliasinfo; -char *p; -char *t; -int count; - -if (chdir ("/sys/kernel/slab" ) &&chdir ("/sys/slab" )) -fatal ("SYSFS support for SLUB not active\n" ); - - dir =opendir ("." ); -while ((de =readdir (dir))) { -if (de->d_name[0 ] =='.' || - (de->d_name[0 ] !=':' &&slab_mismatch (de->d_name))) -continue ; -switch (de->d_type) { -case DT_LNK : - alias->name =strdup (de->d_name); - count =readlink (de->d_name, buffer,sizeof (buffer)); - -if (count <0 ) -fatal ("Cannot read symlink %s\n" , de->d_name); - - buffer[count] =0 ; - p = buffer + count; -while (p > buffer && p[-1 ] !='/' ) - p--; - alias->ref =strdup (p); - alias++; -break ; -case DT_DIR : -if (chdir (de->d_name)) -fatal ("Unable to access slab %s\n" , slab->name); - slab->name =strdup (de->d_name); - slab->alias =0 ; - slab->refs =0 ; - slab->aliases =get_obj ("aliases" ); - slab->align =get_obj ("align" ); - slab->cache_dma =get_obj ("cache_dma" ); - slab->cpu_slabs =get_obj ("cpu_slabs" ); - slab->destroy_by_rcu =get_obj ("destroy_by_rcu" ); - slab->hwcache_align =get_obj ("hwcache_align" ); - slab->object_size =get_obj ("object_size" ); - slab->objects =get_obj ("objects" ); - slab->objects_partial =get_obj ("objects_partial" ); - slab->objects_total =get_obj ("objects_total" ); - slab->objs_per_slab =get_obj ("objs_per_slab" ); - slab->order =get_obj ("order" ); - slab->partial =get_obj ("partial" ); - slab->partial =get_obj_and_str ("partial" , &t); -decode_numa_list (slab->numa_partial, t); -free (t); - slab->poison =get_obj ("poison" ); - slab->reclaim_account =get_obj ("reclaim_account" ); - slab->red_zone =get_obj ("red_zone" ); - slab->sanity_checks =get_obj ("sanity_checks" ); - slab->slab_size =get_obj ("slab_size" ); - slab->slabs =get_obj_and_str ("slabs" , &t); -decode_numa_list (slab->numa, t); -free (t); - slab->store_user =get_obj ("store_user" ); - slab->trace =get_obj ("trace" ); - slab->alloc_fastpath =get_obj ("alloc_fastpath" ); - slab->alloc_slowpath =get_obj ("alloc_slowpath" ); - slab->free_fastpath =get_obj ("free_fastpath" ); - slab->free_slowpath =get_obj ("free_slowpath" ); - slab->free_frozen=get_obj ("free_frozen" ); - slab->free_add_partial =get_obj ("free_add_partial" ); - slab->free_remove_partial =get_obj ("free_remove_partial" ); - slab->alloc_from_partial =get_obj ("alloc_from_partial" ); - slab->alloc_slab =get_obj ("alloc_slab" ); - slab->alloc_refill =get_obj ("alloc_refill" ); - slab->free_slab =get_obj ("free_slab" ); - slab->cpuslab_flush =get_obj ("cpuslab_flush" ); - slab->deactivate_full =get_obj ("deactivate_full" ); - slab->deactivate_empty =get_obj ("deactivate_empty" ); - slab->deactivate_to_head =get_obj ("deactivate_to_head" ); - slab->deactivate_to_tail =get_obj ("deactivate_to_tail" ); - slab->deactivate_remote_frees =get_obj ("deactivate_remote_frees" ); - slab->order_fallback =get_obj ("order_fallback" ); -chdir (".." ); -if (slab->name[0 ] ==':' ) - alias_targets++; - slab++; -break ; -default : -fatal ("Unknown file type %lx\n" , de->d_type); - } - } -closedir (dir); - slabs = slab - slabinfo; - actual_slabs = slabs; - aliases = alias - aliasinfo; -if (slabs >MAX_SLABS ) -fatal ("Too many slabs\n" ); -if (aliases >MAX_ALIASES ) -fatal ("Too many aliases\n" ); -} - -static void output_slabs (void ) -{ -struct slabinfo *slab; - -for (slab = slabinfo; slab < slabinfo + slabs; slab++) { - -if (slab->alias) -continue ; - - -if (show_numa) -slab_numa (slab,0 ); -else if (show_track) -show_tracking (slab); -else if (validate) -slab_validate (slab); -else if (shrink) -slab_shrink (slab); -else if (set_debug) -slab_debug (slab); -else if (show_ops) -ops (slab); -else if (show_slab) -slabcache (slab); -else if (show_report) -report (slab); - } -} - -struct option opts[] = { - {"aliases" ,0 ,NULL ,'a' }, - {"activity" ,0 ,NULL ,'A' }, - {"debug" ,2 ,NULL ,'d' }, - {"display-activity" ,0 ,NULL ,'D' }, - {"empty" ,0 ,NULL ,'e' }, - {"first-alias" ,0 ,NULL ,'f' }, - {"help" ,0 ,NULL ,'h' }, - {"inverted" ,0 ,NULL ,'i' }, - {"numa" ,0 ,NULL ,'n' }, - {"ops" ,0 ,NULL ,'o' }, - {"report" ,0 ,NULL ,'r' }, - {"shrink" ,0 ,NULL ,'s' }, - {"slabs" ,0 ,NULL ,'l' }, - {"track" ,0 ,NULL ,'t' }, - {"validate" ,0 ,NULL ,'v' }, - {"zero" ,0 ,NULL ,'z' }, - {"1ref" ,0 ,NULL ,'1' }, - {NULL ,0 ,NULL ,0 } -}; - -int main (int argc,char *argv[]) -{ -int c; -int err; -char *pattern_source; - - page_size =getpagesize (); - -while ((c =getopt_long (argc, argv,"aAd::Defhil1noprstvzTS" , - opts,NULL )) !=-1 ) -switch (c) { -case '1' : - show_single_ref =1 ; -break ; -case 'a' : - show_alias =1 ; -break ; -case 'A' : - sort_active =1 ; -break ; -case 'd' : - set_debug =1 ; -if (!debug_opt_scan (optarg)) -fatal ("Invalid debug option '%s'\n" , optarg); -break ; -case 'D' : - show_activity =1 ; -break ; -case 'e' : - show_empty =1 ; -break ; -case 'f' : - show_first_alias =1 ; -break ; -case 'h' : -usage (); -return 0 ; -case 'i' : - show_inverted =1 ; -break ; -case 'n' : - show_numa =1 ; -break ; -case 'o' : - show_ops =1 ; -break ; -case 'r' : - show_report =1 ; -break ; -case 's' : - shrink =1 ; -break ; -case 'l' : - show_slab =1 ; -break ; -case 't' : - show_track =1 ; -break ; -case 'v' : - validate =1 ; -break ; -case 'z' : - skip_zero =0 ; -break ; -case 'T' : - show_totals =1 ; -break ; -case 'S' : - sort_size =1 ; -break ; - -default : -fatal ("%s: Invalid option '%c'\n" , argv[0 ], optopt); - - } - -if (!show_slab && !show_alias && !show_track && !show_report - && !validate && !shrink && !set_debug && !show_ops) - show_slab =1 ; - -if (argc > optind) - pattern_source = argv[optind]; -else - pattern_source =".*" ; - - err =regcomp (&pattern, pattern_source,REG_ICASE |REG_NOSUB ); -if (err) -fatal ("%s: Invalid pattern '%s' code %d\n" , - argv[0 ], pattern_source, err); -read_slab_dir (); -if (show_alias) -alias (); -else -if (show_totals) -totals (); -else { -link_slabs (); -rename_slabs (); -sort_slabs (); -output_slabs (); - } -return 0 ; -}
Documentation/vm/slqbinfo.c deleted +0 -1047
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Documentation/vm/slub.txt +1 -1
@@ -17,7 +17,7 @@ data and perform operation on the slabs. slabs that have data in them. See "slabinfo -h" for more options when running the command. slabinfo can be compiled with -gcc -o slabinfo Documentation/vm/slabinfo.c +gcc -o slabinfo tools/vm/slabinfo.c Some of the modes of operation of slabinfo require that slub debugging be enabled on the command line. F.e. no tracking information will be
tools/vm/.gitignore +2 -0
@@ -1 +1,3 @@ page-types +slabinfo +slqbinfo
tools/vm/Makefile +1 -1
@@ -1,5 +1,5 @@ # List of programs to build -hostprogs-y := page-types +hostprogs-y := page-types slabinfo slqbinfo # Tell kbuild to always build the programs always := $(hostprogs-y)
tools/vm/slabinfo.c new file +1364 -0
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tools/vm/slqbinfo.c new file +1047 -0
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Documentation/vm/Makefile deleted +0 -8
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Signature · 5 lines
-- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to [email protected]. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"[email protected]"> [email protected] </a>
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RFC PATCH v2 2/4 slabinfo: move from Documentation/vm/ to tools/vm/
CC Lin Ming <[email protected]>
CC Nick Piggin <[email protected]>
CC Christoph Lameter <[email protected]>
Signed-off-by Wu Fengguang <[email protected]>
---
Sorry, forgot to updated 00-INDEX -fengguang
Documentation/vm/.gitignore | 1 Documentation/vm/00-INDEX | 2 Documentation/vm/Makefile | 8 Documentation/vm/slabinfo.c | 1364 ---------------------------------- Documentation/vm/slqbinfo.c | 1047 -------------------------- Documentation/vm/slub.txt | 2 tools/vm/.gitignore | 2 tools/vm/Makefile | 2 tools/vm/slabinfo.c | 1364 ++++++++++++++++++++++++++++++++++ tools/vm/slqbinfo.c | 1047 ++++++++++++++++++++++++++ 10 files changed, 2415 insertions(+), 2424 deletions(-)
Documentation/vm/slabinfo.c deleted +0 -1364
@@ -1,1364 +0,0 @@ -/* -* Slabinfo: Tool to get reports about slabs -* -* (C) 2007 sgi, Christoph Lameter -* -* Compile by: -* -* gcc -o slabinfo slabinfo.c -*/ -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <dirent.h> -#include <strings.h> -#include <string.h> -#include <unistd.h> -#include <stdarg.h> -#include <getopt.h> -#include <regex.h> -#include <errno.h> - -#define MAX_SLABS 500 -#define MAX_ALIASES 500 -#define MAX_NODES 1024 - -struct slabinfo { -char *name; -int alias; -int refs; -int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu; -int hwcache_align, object_size, objs_per_slab; -int sanity_checks, slab_size, store_user, trace; -int order, poison, reclaim_account, red_zone; -unsigned long partial, objects, slabs, objects_partial, objects_total; -unsigned long alloc_fastpath, alloc_slowpath; -unsigned long free_fastpath, free_slowpath; -unsigned long free_frozen, free_add_partial, free_remove_partial; -unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill; -unsigned long cpuslab_flush, deactivate_full, deactivate_empty; -unsigned long deactivate_to_head, deactivate_to_tail; -unsigned long deactivate_remote_frees, order_fallback; -int numa[MAX_NODES ]; -int numa_partial[MAX_NODES ]; -} slabinfo[MAX_SLABS ]; - -struct aliasinfo { -char *name; -char *ref; -struct slabinfo *slab; -} aliasinfo[MAX_ALIASES ]; - -int slabs =0 ; -int actual_slabs =0 ; -int aliases =0 ; -int alias_targets =0 ; -int highest_node =0 ; - -char buffer[4096 ]; - -int show_empty =0 ; -int show_report =0 ; -int show_alias =0 ; -int show_slab =0 ; -int skip_zero =1 ; -int show_numa =0 ; -int show_track =0 ; -int show_first_alias =0 ; -int validate =0 ; -int shrink =0 ; -int show_inverted =0 ; -int show_single_ref =0 ; -int show_totals =0 ; -int sort_size =0 ; -int sort_active =0 ; -int set_debug =0 ; -int show_ops =0 ; -int show_activity =0 ; - -/* Debug options */ -int sanity =0 ; -int redzone =0 ; -int poison =0 ; -int tracking =0 ; -int tracing =0 ; - -int page_size; - -regex_t pattern; - -static void fatal (const char *x, ...) -{ -va_list ap; - -va_start (ap, x); -vfprintf (stderr, x, ap); -va_end (ap); -exit (EXIT_FAILURE ); -} - -static void usage (void ) -{ -printf ("slabinfo 5/7/2007. (c) 2007 sgi.\n\n" -"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n" -"-a|--aliases Show aliases\n" -"-A|--activity Most active slabs first\n" -"-d<options>|--debug=<options> Set/Clear Debug options\n" -"-D|--display-active Switch line format to activity\n" -"-e|--empty Show empty slabs\n" -"-f|--first-alias Show first alias\n" -"-h|--help Show usage information\n" -"-i|--inverted Inverted list\n" -"-l|--slabs Show slabs\n" -"-n|--numa Show NUMA information\n" -"-o|--ops Show kmem_cache_ops\n" -"-s|--shrink Shrink slabs\n" -"-r|--report Detailed report on single slabs\n" -"-S|--Size Sort by size\n" -"-t|--tracking Show alloc/free information\n" -"-T|--Totals Show summary information\n" -"-v|--validate Validate slabs\n" -"-z|--zero Include empty slabs\n" -"-1|--1ref Single reference\n" -"\nValid debug options (FZPUT may be combined)\n" -"a / A Switch on all debug options (=FZUP)\n" -"- Switch off all debug options\n" -"f / F Sanity Checks (SLAB_DEBUG_FREE)\n" -"z / Z Redzoning\n" -"p / P Poisoning\n" -"u / U Tracking\n" -"t / T Tracing\n" - ); -} - -static unsigned long read_obj (const char *name) -{ -FILE *f =fopen (name,"r" ); - -if (!f) - buffer[0 ] =0 ; -else { -if (!fgets (buffer,sizeof (buffer), f)) - buffer[0 ] =0 ; -fclose (f); -if (buffer[strlen (buffer)] =='\n' ) - buffer[strlen (buffer)] =0 ; - } -return strlen (buffer); -} - - -/* -* Get the contents of an attribute -*/ -static unsigned long get_obj (const char *name) -{ -if (!read_obj (name)) -return 0 ; - -return atol (buffer); -} - -static unsigned long get_obj_and_str (const char *name,char **x) -{ -unsigned long result =0 ; -char *p; - - *x =NULL ; - -if (!read_obj (name)) { - x =NULL ; -return 0 ; - } - result =strtoul (buffer, &p,10 ); -while (*p ==' ' ) - p++; -if (*p) - *x =strdup (p); -return result; -} - -static void set_obj (struct slabinfo *s,const char *name,int n) -{ -char x[100 ]; -FILE *f; - -snprintf (x,100 ,"%s/%s" , s->name, name); - f =fopen (x,"w" ); -if (!f) -fatal ("Cannot write to %s\n" , x); - -fprintf (f,"%d\n" , n); -fclose (f); -} - -static unsigned long read_slab_obj (struct slabinfo *s,const char *name) -{ -char x[100 ]; -FILE *f; -size_t l; - -snprintf (x,100 ,"%s/%s" , s->name, name); - f =fopen (x,"r" ); -if (!f) { - buffer[0 ] =0 ; - l =0 ; - }else { - l =fread (buffer,1 ,sizeof (buffer), f); - buffer[l] =0 ; -fclose (f); - } -return l; -} - - -/* -* Put a size string together -*/ -static int store_size (char *buffer,unsigned long value) -{ -unsigned long divisor =1 ; -char trailer =0 ; -int n; - -if (value >1000000000UL ) { - divisor =100000000UL ; - trailer ='G' ; - }else if (value >1000000UL ) { - divisor =100000UL ; - trailer ='M' ; - }else if (value >1000UL ) { - divisor =100 ; - trailer ='K' ; - } - - value /= divisor; - n =sprintf (buffer,"%ld" ,value); -if (trailer) { - buffer[n] = trailer; - n++; - buffer[n] =0 ; - } -if (divisor !=1 ) { -memmove (buffer + n -2 , buffer + n -3 ,4 ); - buffer[n-2 ] ='.' ; - n++; - } -return n; -} - -static void decode_numa_list (int *numa,char *t) -{ -int node; -int nr; - -memset (numa,0 ,MAX_NODES *sizeof (int )); - -if (!t) -return ; - -while (*t =='N' ) { - t++; - node =strtoul (t, &t,10 ); -if (*t =='=' ) { - t++; - nr =strtoul (t, &t,10 ); - numa[node] = nr; -if (node > highest_node) - highest_node = node; - } -while (*t ==' ' ) - t++; - } -} - -static void slab_validate (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -set_obj (s,"validate" ,1 ); -} - -static void slab_shrink (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -set_obj (s,"shrink" ,1 ); -} - -int line =0 ; - -static void first_line (void ) -{ -if (show_activity) -printf ("Name Objects Alloc Free %%Fast Fallb O\n" ); -else -printf ("Name Objects Objsize Space " -"Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n" ); -} - -/* -* Find the shortest alias of a slab -*/ -static struct aliasinfo *find_one_alias (struct slabinfo *find) -{ -struct aliasinfo *a; -struct aliasinfo *best =NULL ; - -for (a = aliasinfo;a < aliasinfo + aliases; a++) { -if (a->slab == find && - (!best ||strlen (best->name) <strlen (a->name))) { - best = a; -if (strncmp (a->name,"kmall" ,5 ) ==0 ) -return best; - } - } -return best; -} - -static unsigned long slab_size (struct slabinfo *s) -{ -return s->slabs * (page_size << s->order); -} - -static unsigned long slab_activity (struct slabinfo *s) -{ -return s->alloc_fastpath + s->free_fastpath + - s->alloc_slowpath + s->free_slowpath; -} - -static void slab_numa (struct slabinfo *s,int mode) -{ -int node; - -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (!highest_node) { -printf ("\n%s: No NUMA information available.\n" , s->name); -return ; - } - -if (skip_zero && !s->slabs) -return ; - -if (!line) { -printf ("\n%-21s:" , mode ?"NUMA nodes" :"Slab" ); -for (node =0 ; node <= highest_node; node++) -printf (" %4d" , node); -printf ("\n----------------------" ); -for (node =0 ; node <= highest_node; node++) -printf ("-----" ); -printf ("\n" ); - } -printf ("%-21s " , mode ?"All slabs" : s->name); -for (node =0 ; node <= highest_node; node++) { -char b[20 ]; - -store_size (b, s->numa[node]); -printf (" %4s" , b); - } -printf ("\n" ); -if (mode) { -printf ("%-21s " ,"Partial slabs" ); -for (node =0 ; node <= highest_node; node++) { -char b[20 ]; - -store_size (b, s->numa_partial[node]); -printf (" %4s" , b); - } -printf ("\n" ); - } - line++; -} - -static void show_tracking (struct slabinfo *s) -{ -printf ("\n%s: Kernel object allocation\n" , s->name); -printf ("-----------------------------------------------------------------------\n" ); -if (read_slab_obj (s,"alloc_calls" )) -printf (buffer); -else -printf ("No Data\n" ); - -printf ("\n%s: Kernel object freeing\n" , s->name); -printf ("------------------------------------------------------------------------\n" ); -if (read_slab_obj (s,"free_calls" )) -printf (buffer); -else -printf ("No Data\n" ); - -} - -static void ops (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (read_slab_obj (s,"ops" )) { -printf ("\n%s: kmem_cache operations\n" , s->name); -printf ("--------------------------------------------\n" ); -printf (buffer); - }else -printf ("\n%s has no kmem_cache operations\n" , s->name); -} - -static const char *onoff (int x) -{ -if (x) -return "On " ; -return "Off" ; -} - -static void slab_stats (struct slabinfo *s) -{ -unsigned long total_alloc; -unsigned long total_free; -unsigned long total; - -if (!s->alloc_slab) -return ; - - total_alloc = s->alloc_fastpath + s->alloc_slowpath; - total_free = s->free_fastpath + s->free_slowpath; - -if (!total_alloc) -return ; - -printf ("\n" ); -printf ("Slab Perf Counter Alloc Free %%Al %%Fr\n" ); -printf ("--------------------------------------------------\n" ); -printf ("Fastpath %8lu %8lu %3lu %3lu\n" , - s->alloc_fastpath, s->free_fastpath, - s->alloc_fastpath *100 / total_alloc, - s->free_fastpath *100 / total_free); -printf ("Slowpath %8lu %8lu %3lu %3lu\n" , - total_alloc - s->alloc_fastpath, s->free_slowpath, - (total_alloc - s->alloc_fastpath) *100 / total_alloc, - s->free_slowpath *100 / total_free); -printf ("Page Alloc %8lu %8lu %3lu %3lu\n" , - s->alloc_slab, s->free_slab, - s->alloc_slab *100 / total_alloc, - s->free_slab *100 / total_free); -printf ("Add partial %8lu %8lu %3lu %3lu\n" , - s->deactivate_to_head + s->deactivate_to_tail, - s->free_add_partial, - (s->deactivate_to_head + s->deactivate_to_tail) *100 / total_alloc, - s->free_add_partial *100 / total_free); -printf ("Remove partial %8lu %8lu %3lu %3lu\n" , - s->alloc_from_partial, s->free_remove_partial, - s->alloc_from_partial *100 / total_alloc, - s->free_remove_partial *100 / total_free); - -printf ("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n" , - s->deactivate_remote_frees, s->free_frozen, - s->deactivate_remote_frees *100 / total_alloc, - s->free_frozen *100 / total_free); - -printf ("Total %8lu %8lu\n\n" , total_alloc, total_free); - -if (s->cpuslab_flush) -printf ("Flushes %8lu\n" , s->cpuslab_flush); - -if (s->alloc_refill) -printf ("Refill %8lu\n" , s->alloc_refill); - - total = s->deactivate_full + s->deactivate_empty + - s->deactivate_to_head + s->deactivate_to_tail; - -if (total) -printf ("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) " -"ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n" , - s->deactivate_full, (s->deactivate_full *100 ) / total, - s->deactivate_empty, (s->deactivate_empty *100 ) / total, - s->deactivate_to_head, (s->deactivate_to_head *100 ) / total, - s->deactivate_to_tail, (s->deactivate_to_tail *100 ) / total); -} - -static void report (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -printf ("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n" , - s->name, s->aliases, s->order, s->objects); -if (s->hwcache_align) -printf ("** Hardware cacheline aligned\n" ); -if (s->cache_dma) -printf ("** Memory is allocated in a special DMA zone\n" ); -if (s->destroy_by_rcu) -printf ("** Slabs are destroyed via RCU\n" ); -if (s->reclaim_account) -printf ("** Reclaim accounting active\n" ); - -printf ("\nSizes (bytes) Slabs Debug Memory\n" ); -printf ("------------------------------------------------------------------------\n" ); -printf ("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n" , - s->object_size, s->slabs,onoff (s->sanity_checks), - s->slabs * (page_size << s->order)); -printf ("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n" , - s->slab_size, s->slabs - s->partial - s->cpu_slabs, -onoff (s->red_zone), s->objects * s->object_size); -printf ("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n" , - page_size << s->order, s->partial,onoff (s->poison), - s->slabs * (page_size << s->order) - s->objects * s->object_size); -printf ("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n" , - s->slab_size - s->object_size, s->cpu_slabs,onoff (s->store_user), - (s->slab_size - s->object_size) * s->objects); -printf ("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n" , - s->align, s->objs_per_slab,onoff (s->trace), - ((page_size << s->order) - s->objs_per_slab * s->slab_size) * - s->slabs); - -ops (s); -show_tracking (s); -slab_numa (s,1 ); -slab_stats (s); -} - -static void slabcache (struct slabinfo *s) -{ -char size_str[20 ]; -char dist_str[40 ]; -char flags[20 ]; -char *p = flags; - -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (actual_slabs ==1 ) { -report (s); -return ; - } - -if (skip_zero && !show_empty && !s->slabs) -return ; - -if (show_empty && s->slabs) -return ; - -store_size (size_str,slab_size (s)); -snprintf (dist_str,40 ,"%lu/%lu/%d" , s->slabs - s->cpu_slabs, - s->partial, s->cpu_slabs); - -if (!line++) -first_line (); - -if (s->aliases) - *p++ ='*' ; -if (s->cache_dma) - *p++ ='d' ; -if (s->hwcache_align) - *p++ ='A' ; -if (s->poison) - *p++ ='P' ; -if (s->reclaim_account) - *p++ ='a' ; -if (s->red_zone) - *p++ ='Z' ; -if (s->sanity_checks) - *p++ ='F' ; -if (s->store_user) - *p++ ='U' ; -if (s->trace) - *p++ ='T' ; - - *p =0 ; -if (show_activity) { -unsigned long total_alloc; -unsigned long total_free; - - total_alloc = s->alloc_fastpath + s->alloc_slowpath; - total_free = s->free_fastpath + s->free_slowpath; - -printf ("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n" , - s->name, s->objects, - total_alloc, total_free, - total_alloc ? (s->alloc_fastpath *100 / total_alloc) :0 , - total_free ? (s->free_fastpath *100 / total_free) :0 , - s->order_fallback, s->order); - } -else -printf ("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n" , - s->name, s->objects, s->object_size, size_str, dist_str, - s->objs_per_slab, s->order, - s->slabs ? (s->partial *100 ) / s->slabs :100 , - s->slabs ? (s->objects * s->object_size *100 ) / - (s->slabs * (page_size << s->order)) :100 , - flags); -} - -/* -* Analyze debug options. Return false if something is amiss. -*/ -static int debug_opt_scan (char *opt) -{ -if (!opt || !opt[0 ] ||strcmp (opt,"-" ) ==0 ) -return 1 ; - -if (strcasecmp (opt,"a" ) ==0 ) { - sanity =1 ; - poison =1 ; - redzone =1 ; - tracking =1 ; -return 1 ; - } - -for ( ; *opt; opt++) -switch (*opt) { -case 'F' :case 'f' : -if (sanity) -return 0 ; - sanity =1 ; -break ; -case 'P' :case 'p' : -if (poison) -return 0 ; - poison =1 ; -break ; - -case 'Z' :case 'z' : -if (redzone) -return 0 ; - redzone =1 ; -break ; - -case 'U' :case 'u' : -if (tracking) -return 0 ; - tracking =1 ; -break ; - -case 'T' :case 't' : -if (tracing) -return 0 ; - tracing =1 ; -break ; -default : -return 0 ; - } -return 1 ; -} - -static int slab_empty (struct slabinfo *s) -{ -if (s->objects >0 ) -return 0 ; - -/* -* We may still have slabs even if there are no objects. Shrinking will -* remove them. -*/ -if (s->slabs !=0 ) -set_obj (s,"shrink" ,1 ); - -return 1 ; -} - -static void slab_debug (struct slabinfo *s) -{ -if (strcmp (s->name,"*" ) ==0 ) -return ; - -if (sanity && !s->sanity_checks) { -set_obj (s,"sanity" ,1 ); - } -if (!sanity && s->sanity_checks) { -if (slab_empty (s)) -set_obj (s,"sanity" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable sanity checks\n" , s->name); - } -if (redzone && !s->red_zone) { -if (slab_empty (s)) -set_obj (s,"red_zone" ,1 ); -else -fprintf (stderr,"%s not empty cannot enable redzoning\n" , s->name); - } -if (!redzone && s->red_zone) { -if (slab_empty (s)) -set_obj (s,"red_zone" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable redzoning\n" , s->name); - } -if (poison && !s->poison) { -if (slab_empty (s)) -set_obj (s,"poison" ,1 ); -else -fprintf (stderr,"%s not empty cannot enable poisoning\n" , s->name); - } -if (!poison && s->poison) { -if (slab_empty (s)) -set_obj (s,"poison" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable poisoning\n" , s->name); - } -if (tracking && !s->store_user) { -if (slab_empty (s)) -set_obj (s,"store_user" ,1 ); -else -fprintf (stderr,"%s not empty cannot enable tracking\n" , s->name); - } -if (!tracking && s->store_user) { -if (slab_empty (s)) -set_obj (s,"store_user" ,0 ); -else -fprintf (stderr,"%s not empty cannot disable tracking\n" , s->name); - } -if (tracing && !s->trace) { -if (slabs ==1 ) -set_obj (s,"trace" ,1 ); -else -fprintf (stderr,"%s can only enable trace for one slab at a time\n" , s->name); - } -if (!tracing && s->trace) -set_obj (s,"trace" ,1 ); -} - -static void totals (void ) -{ -struct slabinfo *s; - -int used_slabs =0 ; -char b1[20 ], b2[20 ], b3[20 ], b4[20 ]; -unsigned long long max =1ULL <<63 ; - -/* Object size */ -unsigned long long min_objsize = max, max_objsize =0 , avg_objsize; - -/* Number of partial slabs in a slabcache */ -unsigned long long min_partial = max, max_partial =0 , - avg_partial, total_partial =0 ; - -/* Number of slabs in a slab cache */ -unsigned long long min_slabs = max, max_slabs =0 , - avg_slabs, total_slabs =0 ; - -/* Size of the whole slab */ -unsigned long long min_size = max, max_size =0 , - avg_size, total_size =0 ; - -/* Bytes used for object storage in a slab */ -unsigned long long min_used = max, max_used =0 , - avg_used, total_used =0 ; - -/* Waste: Bytes used for alignment and padding */ -unsigned long long min_waste = max, max_waste =0 , - avg_waste, total_waste =0 ; -/* Number of objects in a slab */ -unsigned long long min_objects = max, max_objects =0 , - avg_objects, total_objects =0 ; -/* Waste per object */ -unsigned long long min_objwaste = max, - max_objwaste =0 , avg_objwaste, - total_objwaste =0 ; - -/* Memory per object */ -unsigned long long min_memobj = max, - max_memobj =0 , avg_memobj, - total_objsize =0 ; - -/* Percentage of partial slabs per slab */ -unsigned long min_ppart =100 , max_ppart =0 , - avg_ppart, total_ppart =0 ; - -/* Number of objects in partial slabs */ -unsigned long min_partobj = max, max_partobj =0 , - avg_partobj, total_partobj =0 ; - -/* Percentage of partial objects of all objects in a slab */ -unsigned long min_ppartobj =100 , max_ppartobj =0 , - avg_ppartobj, total_ppartobj =0 ; - - -for (s = slabinfo; s < slabinfo + slabs; s++) { -unsigned long long size; -unsigned long used; -unsigned long long wasted; -unsigned long long objwaste; -unsigned long percentage_partial_slabs; -unsigned long percentage_partial_objs; - -if (!s->slabs || !s->objects) -continue ; - - used_slabs++; - - size =slab_size (s); - used = s->objects * s->object_size; - wasted = size - used; - objwaste = s->slab_size - s->object_size; - - percentage_partial_slabs = s->partial *100 / s->slabs; -if (percentage_partial_slabs >100 ) - percentage_partial_slabs =100 ; - - percentage_partial_objs = s->objects_partial *100 - / s->objects; - -if (percentage_partial_objs >100 ) - percentage_partial_objs =100 ; - -if (s->object_size < min_objsize) - min_objsize = s->object_size; -if (s->partial < min_partial) - min_partial = s->partial; -if (s->slabs < min_slabs) - min_slabs = s->slabs; -if (size < min_size) - min_size = size; -if (wasted < min_waste) - min_waste = wasted; -if (objwaste < min_objwaste) - min_objwaste = objwaste; -if (s->objects < min_objects) - min_objects = s->objects; -if (used < min_used) - min_used = used; -if (s->objects_partial < min_partobj) - min_partobj = s->objects_partial; -if (percentage_partial_slabs < min_ppart) - min_ppart = percentage_partial_slabs; -if (percentage_partial_objs < min_ppartobj) - min_ppartobj = percentage_partial_objs; -if (s->slab_size < min_memobj) - min_memobj = s->slab_size; - -if (s->object_size > max_objsize) - max_objsize = s->object_size; -if (s->partial > max_partial) - max_partial = s->partial; -if (s->slabs > max_slabs) - max_slabs = s->slabs; -if (size > max_size) - max_size = size; -if (wasted > max_waste) - max_waste = wasted; -if (objwaste > max_objwaste) - max_objwaste = objwaste; -if (s->objects > max_objects) - max_objects = s->objects; -if (used > max_used) - max_used = used; -if (s->objects_partial > max_partobj) - max_partobj = s->objects_partial; -if (percentage_partial_slabs > max_ppart) - max_ppart = percentage_partial_slabs; -if (percentage_partial_objs > max_ppartobj) - max_ppartobj = percentage_partial_objs; -if (s->slab_size > max_memobj) - max_memobj = s->slab_size; - - total_partial += s->partial; - total_slabs += s->slabs; - total_size += size; - total_waste += wasted; - - total_objects += s->objects; - total_used += used; - total_partobj += s->objects_partial; - total_ppart += percentage_partial_slabs; - total_ppartobj += percentage_partial_objs; - - total_objwaste += s->objects * objwaste; - total_objsize += s->objects * s->slab_size; - } - -if (!total_objects) { -printf ("No objects\n" ); -return ; - } -if (!used_slabs) { -printf ("No slabs\n" ); -return ; - } - -/* Per slab averages */ - avg_partial = total_partial / used_slabs; - avg_slabs = total_slabs / used_slabs; - avg_size = total_size / used_slabs; - avg_waste = total_waste / used_slabs; - - avg_objects = total_objects / used_slabs; - avg_used = total_used / used_slabs; - avg_partobj = total_partobj / used_slabs; - avg_ppart = total_ppart / used_slabs; - avg_ppartobj = total_ppartobj / used_slabs; - -/* Per object object sizes */ - avg_objsize = total_used / total_objects; - avg_objwaste = total_objwaste / total_objects; - avg_partobj = total_partobj *100 / total_objects; - avg_memobj = total_objsize / total_objects; - -printf ("Slabcache Totals\n" ); -printf ("----------------\n" ); -printf ("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n" , - slabs, aliases, alias_targets, used_slabs); - -store_size (b1, total_size);store_size (b2, total_waste); -store_size (b3, total_waste *100 / total_used); -printf ("Memory used: %6s # Loss : %6s MRatio:%6s%%\n" , b1, b2, b3); - -store_size (b1, total_objects);store_size (b2, total_partobj); -store_size (b3, total_partobj *100 / total_objects); -printf ("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n" , b1, b2, b3); - -printf ("\n" ); -printf ("Per Cache Average Min Max Total\n" ); -printf ("---------------------------------------------------------\n" ); - -store_size (b1, avg_objects);store_size (b2, min_objects); -store_size (b3, max_objects);store_size (b4, total_objects); -printf ("#Objects %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_slabs);store_size (b2, min_slabs); -store_size (b3, max_slabs);store_size (b4, total_slabs); -printf ("#Slabs %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_partial);store_size (b2, min_partial); -store_size (b3, max_partial);store_size (b4, total_partial); -printf ("#PartSlab %10s %10s %10s %10s\n" , - b1, b2, b3, b4); -store_size (b1, avg_ppart);store_size (b2, min_ppart); -store_size (b3, max_ppart); -store_size (b4, total_partial *100 / total_slabs); -printf ("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n" , - b1, b2, b3, b4); - -store_size (b1, avg_partobj);store_size (b2, min_partobj); -store_size (b3, max_partobj); -store_size (b4, total_partobj); -printf ("PartObjs %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_ppartobj);store_size (b2, min_ppartobj); -store_size (b3, max_ppartobj); -store_size (b4, total_partobj *100 / total_objects); -printf ("%% PartObj%10s%% %10s%% %10s%% %10s%%\n" , - b1, b2, b3, b4); - -store_size (b1, avg_size);store_size (b2, min_size); -store_size (b3, max_size);store_size (b4, total_size); -printf ("Memory %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_used);store_size (b2, min_used); -store_size (b3, max_used);store_size (b4, total_used); -printf ("Used %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -store_size (b1, avg_waste);store_size (b2, min_waste); -store_size (b3, max_waste);store_size (b4, total_waste); -printf ("Loss %10s %10s %10s %10s\n" , - b1, b2, b3, b4); - -printf ("\n" ); -printf ("Per Object Average Min Max\n" ); -printf ("---------------------------------------------\n" ); - -store_size (b1, avg_memobj);store_size (b2, min_memobj); -store_size (b3, max_memobj); -printf ("Memory %10s %10s %10s\n" , - b1, b2, b3); -store_size (b1, avg_objsize);store_size (b2, min_objsize); -store_size (b3, max_objsize); -printf ("User %10s %10s %10s\n" , - b1, b2, b3); - -store_size (b1, avg_objwaste);store_size (b2, min_objwaste); -store_size (b3, max_objwaste); -printf ("Loss %10s %10s %10s\n" , - b1, b2, b3); -} - -static void sort_slabs (void ) -{ -struct slabinfo *s1,*s2; - -for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) { -for (s2 = s1 +1 ; s2 < slabinfo + slabs; s2++) { -int result; - -if (sort_size) - result =slab_size (s1) <slab_size (s2); -else if (sort_active) - result =slab_activity (s1) <slab_activity (s2); -else - result =strcasecmp (s1->name, s2->name); - -if (show_inverted) - result = -result; - -if (result >0 ) { -struct slabinfo t; - -memcpy (&t, s1,sizeof (struct slabinfo )); -memcpy (s1, s2,sizeof (struct slabinfo )); -memcpy (s2, &t,sizeof (struct slabinfo )); - } - } - } -} - -static void sort_aliases (void ) -{ -struct aliasinfo *a1,*a2; - -for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) { -for (a2 = a1 +1 ; a2 < aliasinfo + aliases; a2++) { -char *n1, *n2; - - n1 = a1->name; - n2 = a2->name; -if (show_alias && !show_inverted) { - n1 = a1->ref; - n2 = a2->ref; - } -if (strcasecmp (n1, n2) >0 ) { -struct aliasinfo t; - -memcpy (&t, a1,sizeof (struct aliasinfo )); -memcpy (a1, a2,sizeof (struct aliasinfo )); -memcpy (a2, &t,sizeof (struct aliasinfo )); - } - } - } -} - -static void link_slabs (void ) -{ -struct aliasinfo *a; -struct slabinfo *s; - -for (a = aliasinfo; a < aliasinfo + aliases; a++) { - -for (s = slabinfo; s < slabinfo + slabs; s++) -if (strcmp (a->ref, s->name) ==0 ) { - a->slab = s; - s->refs++; -break ; - } -if (s == slabinfo + slabs) -fatal ("Unresolved alias %s\n" , a->ref); - } -} - -static void alias (void ) -{ -struct aliasinfo *a; -char *active =NULL ; - -sort_aliases (); -link_slabs (); - -for (a = aliasinfo; a < aliasinfo + aliases; a++) { - -if (!show_single_ref && a->slab->refs ==1 ) -continue ; - -if (!show_inverted) { -if (active) { -if (strcmp (a->slab->name, active) ==0 ) { -printf (" %s" , a->name); -continue ; - } - } -printf ("\n%-12s <- %s" , a->slab->name, a->name); - active = a->slab->name; - } -else -printf ("%-20s -> %s\n" , a->name, a->slab->name); - } -if (active) -printf ("\n" ); -} - - -static void rename_slabs (void ) -{ -struct slabinfo *s; -struct aliasinfo *a; - -for (s = slabinfo; s < slabinfo + slabs; s++) { -if (*s->name !=':' ) -continue ; - -if (s->refs >1 && !show_first_alias) -continue ; - - a =find_one_alias (s); - -if (a) - s->name = a->name; -else { - s->name ="*" ; - actual_slabs--; - } - } -} - -static int slab_mismatch (char *slab) -{ -return regexec (&pattern, slab,0 ,NULL ,0 ); -} - -static void read_slab_dir (void ) -{ -DIR *dir; -struct dirent *de; -struct slabinfo *slab = slabinfo; -struct aliasinfo *alias = aliasinfo; -char *p; -char *t; -int count; - -if (chdir ("/sys/kernel/slab" ) &&chdir ("/sys/slab" )) -fatal ("SYSFS support for SLUB not active\n" ); - - dir =opendir ("." ); -while ((de =readdir (dir))) { -if (de->d_name[0 ] =='.' || - (de->d_name[0 ] !=':' &&slab_mismatch (de->d_name))) -continue ; -switch (de->d_type) { -case DT_LNK : - alias->name =strdup (de->d_name); - count =readlink (de->d_name, buffer,sizeof (buffer)); - -if (count <0 ) -fatal ("Cannot read symlink %s\n" , de->d_name); - - buffer[count] =0 ; - p = buffer + count; -while (p > buffer && p[-1 ] !='/' ) - p--; - alias->ref =strdup (p); - alias++; -break ; -case DT_DIR : -if (chdir (de->d_name)) -fatal ("Unable to access slab %s\n" , slab->name); - slab->name =strdup (de->d_name); - slab->alias =0 ; - slab->refs =0 ; - slab->aliases =get_obj ("aliases" ); - slab->align =get_obj ("align" ); - slab->cache_dma =get_obj ("cache_dma" ); - slab->cpu_slabs =get_obj ("cpu_slabs" ); - slab->destroy_by_rcu =get_obj ("destroy_by_rcu" ); - slab->hwcache_align =get_obj ("hwcache_align" ); - slab->object_size =get_obj ("object_size" ); - slab->objects =get_obj ("objects" ); - slab->objects_partial =get_obj ("objects_partial" ); - slab->objects_total =get_obj ("objects_total" ); - slab->objs_per_slab =get_obj ("objs_per_slab" ); - slab->order =get_obj ("order" ); - slab->partial =get_obj ("partial" ); - slab->partial =get_obj_and_str ("partial" , &t); -decode_numa_list (slab->numa_partial, t); -free (t); - slab->poison =get_obj ("poison" ); - slab->reclaim_account =get_obj ("reclaim_account" ); - slab->red_zone =get_obj ("red_zone" ); - slab->sanity_checks =get_obj ("sanity_checks" ); - slab->slab_size =get_obj ("slab_size" ); - slab->slabs =get_obj_and_str ("slabs" , &t); -decode_numa_list (slab->numa, t); -free (t); - slab->store_user =get_obj ("store_user" ); - slab->trace =get_obj ("trace" ); - slab->alloc_fastpath =get_obj ("alloc_fastpath" ); - slab->alloc_slowpath =get_obj ("alloc_slowpath" ); - slab->free_fastpath =get_obj ("free_fastpath" ); - slab->free_slowpath =get_obj ("free_slowpath" ); - slab->free_frozen=get_obj ("free_frozen" ); - slab->free_add_partial =get_obj ("free_add_partial" ); - slab->free_remove_partial =get_obj ("free_remove_partial" ); - slab->alloc_from_partial =get_obj ("alloc_from_partial" ); - slab->alloc_slab =get_obj ("alloc_slab" ); - slab->alloc_refill =get_obj ("alloc_refill" ); - slab->free_slab =get_obj ("free_slab" ); - slab->cpuslab_flush =get_obj ("cpuslab_flush" ); - slab->deactivate_full =get_obj ("deactivate_full" ); - slab->deactivate_empty =get_obj ("deactivate_empty" ); - slab->deactivate_to_head =get_obj ("deactivate_to_head" ); - slab->deactivate_to_tail =get_obj ("deactivate_to_tail" ); - slab->deactivate_remote_frees =get_obj ("deactivate_remote_frees" ); - slab->order_fallback =get_obj ("order_fallback" ); -chdir (".." ); -if (slab->name[0 ] ==':' ) - alias_targets++; - slab++; -break ; -default : -fatal ("Unknown file type %lx\n" , de->d_type); - } - } -closedir (dir); - slabs = slab - slabinfo; - actual_slabs = slabs; - aliases = alias - aliasinfo; -if (slabs >MAX_SLABS ) -fatal ("Too many slabs\n" ); -if (aliases >MAX_ALIASES ) -fatal ("Too many aliases\n" ); -} - -static void output_slabs (void ) -{ -struct slabinfo *slab; - -for (slab = slabinfo; slab < slabinfo + slabs; slab++) { - -if (slab->alias) -continue ; - - -if (show_numa) -slab_numa (slab,0 ); -else if (show_track) -show_tracking (slab); -else if (validate) -slab_validate (slab); -else if (shrink) -slab_shrink (slab); -else if (set_debug) -slab_debug (slab); -else if (show_ops) -ops (slab); -else if (show_slab) -slabcache (slab); -else if (show_report) -report (slab); - } -} - -struct option opts[] = { - {"aliases" ,0 ,NULL ,'a' }, - {"activity" ,0 ,NULL ,'A' }, - {"debug" ,2 ,NULL ,'d' }, - {"display-activity" ,0 ,NULL ,'D' }, - {"empty" ,0 ,NULL ,'e' }, - {"first-alias" ,0 ,NULL ,'f' }, - {"help" ,0 ,NULL ,'h' }, - {"inverted" ,0 ,NULL ,'i' }, - {"numa" ,0 ,NULL ,'n' }, - {"ops" ,0 ,NULL ,'o' }, - {"report" ,0 ,NULL ,'r' }, - {"shrink" ,0 ,NULL ,'s' }, - {"slabs" ,0 ,NULL ,'l' }, - {"track" ,0 ,NULL ,'t' }, - {"validate" ,0 ,NULL ,'v' }, - {"zero" ,0 ,NULL ,'z' }, - {"1ref" ,0 ,NULL ,'1' }, - {NULL ,0 ,NULL ,0 } -}; - -int main (int argc,char *argv[]) -{ -int c; -int err; -char *pattern_source; - - page_size =getpagesize (); - -while ((c =getopt_long (argc, argv,"aAd::Defhil1noprstvzTS" , - opts,NULL )) !=-1 ) -switch (c) { -case '1' : - show_single_ref =1 ; -break ; -case 'a' : - show_alias =1 ; -break ; -case 'A' : - sort_active =1 ; -break ; -case 'd' : - set_debug =1 ; -if (!debug_opt_scan (optarg)) -fatal ("Invalid debug option '%s'\n" , optarg); -break ; -case 'D' : - show_activity =1 ; -break ; -case 'e' : - show_empty =1 ; -break ; -case 'f' : - show_first_alias =1 ; -break ; -case 'h' : -usage (); -return 0 ; -case 'i' : - show_inverted =1 ; -break ; -case 'n' : - show_numa =1 ; -break ; -case 'o' : - show_ops =1 ; -break ; -case 'r' : - show_report =1 ; -break ; -case 's' : - shrink =1 ; -break ; -case 'l' : - show_slab =1 ; -break ; -case 't' : - show_track =1 ; -break ; -case 'v' : - validate =1 ; -break ; -case 'z' : - skip_zero =0 ; -break ; -case 'T' : - show_totals =1 ; -break ; -case 'S' : - sort_size =1 ; -break ; - -default : -fatal ("%s: Invalid option '%c'\n" , argv[0 ], optopt); - - } - -if (!show_slab && !show_alias && !show_track && !show_report - && !validate && !shrink && !set_debug && !show_ops) - show_slab =1 ; - -if (argc > optind) - pattern_source = argv[optind]; -else - pattern_source =".*" ; - - err =regcomp (&pattern, pattern_source,REG_ICASE |REG_NOSUB ); -if (err) -fatal ("%s: Invalid pattern '%s' code %d\n" , - argv[0 ], pattern_source, err); -read_slab_dir (); -if (show_alias) -alias (); -else -if (show_totals) -totals (); -else { -link_slabs (); -rename_slabs (); -sort_slabs (); -output_slabs (); - } -return 0 ; -}
Documentation/vm/slqbinfo.c deleted +0 -1047
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Documentation/vm/slub.txt +1 -1
@@ -17,7 +17,7 @@ data and perform operation on the slabs. slabs that have data in them. See "slabinfo -h" for more options when running the command. slabinfo can be compiled with -gcc -o slabinfo Documentation/vm/slabinfo.c +gcc -o slabinfo tools/vm/slabinfo.c Some of the modes of operation of slabinfo require that slub debugging be enabled on the command line. F.e. no tracking information will be
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@@ -1 +1,3 @@ page-types +slabinfo +slqbinfo
tools/vm/Makefile +1 -1
@@ -1,5 +1,5 @@ # List of programs to build -hostprogs-y := page-types +hostprogs-y := page-types slabinfo slqbinfo # Tell kbuild to always build the programs always := $(hostprogs-y)
tools/vm/slabinfo.c new file +1364 -0
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Re: [RFC][PATCH 2/4 v2] slabinfo: move from Documentation/vm/ to tools/vm/