perf c2c report: Allow to report callchains
tip-bot for Jiri Olsa
merge botCommit-ID: dd805768f7d74ba412817811cc60e2b153a43ee8 Gitweb: http://git.kernel.org/tip/dd805768f7d74ba412817811cc60e2b153a43ee8 Author: Jiri Olsa <[email protected]> AuthorDate: Wed, 11 May 2016 18:23:48 +0200 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Fri, 21 Oct 2016 10:31:56 -0300
perf c2c report: Allow to report callchains
Add --call-graph option to properly setup callchain code. Adding default settings to display callchains whenever they are stored in the perf.data.
Committer Notes:
Testing it:
[root@jouet ~]# perf c2c record -a -g sleep 5
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 5.331 MB perf.data (4263 samples) ] [root@jouet ~]# perf evlist -v
cpu/mem-loads,ldlat=30/P: type: 4, size: 112, config: 0x1cd, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ADDR|CALLCHAIN|ID|CPU|PERIOD|DATA_SRC|WEIGHT, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, mmap_data: 1, sample_id_all: 1, mmap2: 1, comm_exec: 1, { bp_addr, config1 }: 0x1f
cpu/mem-stores/P: type: 4, size: 112, config: 0x82d0, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ADDR|CALLCHAIN|ID|CPU|PERIOD|DATA_SRC|WEIGHT, read_format: ID, disabled: 1, inherit: 1, freq: 1, precise_ip: 3, sample_id_all: 1
[root@jouet ~]# perf c2c report --stats
=================================================
Trace Event Information
=================================================
Total records : 4263
Locked Load/Store Operations : 220
Load Operations : 2130
Loads - uncacheable : 1
Loads - IO : 7
Loads - Miss : 86
Loads - no mapping : 5
Load Fill Buffer Hit : 609
Load L1D hit : 612
=================================================
Trace Event Information
=================================================
Total records : 4263
Locked Load/Store Operations : 220
Load Operations : 2130
Loads - uncacheable : 1
Loads - IO : 7
Loads - Miss : 86
Loads - no mapping : 5
Load Fill Buffer Hit : 609
Load L1D hit : 612
Load L2D hit : 27
Load LLC hit : 607
Load Local HITM : 15
Load Remote HITM : 0
Load Remote HIT : 0
Load Local DRAM : 176
Load Remote DRAM : 0
Load MESI State Exclusive : 176
Load MESI State Shared : 0
Load LLC Misses : 176
LLC Misses to Local DRAM : 100.0%
LLC Misses to Remote DRAM : 0.0%
LLC Misses to Remote cache (HIT) : 0.0% LLC Misses to Remote cache (HITM) : 0.0%
Store Operations : 2133
Store - uncacheable : 0
Store - no mapping : 1
Store L1D Hit : 1967
Store L1D Miss : 165
No Page Map Rejects : 145
Unable to parse data source : 0
=================================================
Global Shared Cache Line Event Information
=================================================
Total Shared Cache Lines : 15
Load HITs on shared lines : 26
Fill Buffer Hits on shared lines : 7
L1D hits on shared lines : 3
L2D hits on shared lines : 0
LLC hits on shared lines : 16
Locked Access on shared lines : 2
Store HITs on shared lines : 8
Store L1D hits on shared lines : 7
Total Merged records : 23 =================================================
c2c details
=================================================
Events : cpu/mem-loads,ldlat=30/P
: cpu/mem-stores/P
[root@jouet ~]#
[root@jouet ~]# perf c2c report
Shared Data Cache Line Table (2378 entries)
Total --- LLC Load Hitm -- -- Store Reference - - Load Dram - LLC Total - Core Load Hit -
Cacheline records %hitm Total Lcl Rmt Total L1Hit L1Miss Lcl Rmt Ld Miss Loads FB L1 L2
- 0xffff880024380c00 10 0.00% 0 0 0 6 6 0 0 0 0 4 1 3 0
- 0.13% _raw_spin_lock_irqsave
- 0.07% ep_poll
sys_epoll_wait
do_syscall_64
return_from_SYSCALL_64
+ 0x103573
- 0.05% ep_poll_callback
__wake_up_common
- __wake_up_sync_key
- 0.02% pipe_read
__vfs_read
vfs_read
sys_read
do_syscall_64
return_from_SYSCALL_64
0xfdad
+ 0.02% sock_def_readable
+ 0.02% ep_scan_ready_list.constprop.12
+ 0.00% mutex_lock
+ 0.00% __wake_up_common
+ 0xffff880024380c40 1 0.00% 0 0 0 1 1 0 0 0 0 0 0 0 0
+ 0xffff880024380c80 1 0.00% 0 0 0 0 0 0 0 0 0 1 0 0 0
- 0xffff8800243e9f00 1 0.00% 0 0 0 1 1 0 0 0 0 0 0 0 0 enqueue_entity
enqueue_task_fair
activate_task
ttwu_do_activate
try_to_wake_up
wake_up_process
hrtimer_wakeup
__hrtimer_run_queues
hrtimer_interrupt
local_apic_timer_interrupt
smp_apic_timer_interrupt
apic_timer_interrupt
cpuidle_enter
call_cpuidle
help
-------------
And when presing 'd' to see the cacheline details:
Cacheline 0xffff880024380c00
----- HITM ----- -- Store Refs -- --------- cycles ----- cpu
Rmt Lcl L1 Hit L1 Miss Off Pid Tid rmt hitm lcl hitm load cnt Symbol
- 0.00% 0.00% 100.00% 0.00% 0x0 1473 1474:Chrome_ChildIOT 0 0 41 2 [k] _raw_spin_lock_irqsave [kernel]
- _raw_spin_lock_irqsave
- 51.52% ep_poll
sys_epoll_wait
do_syscall_64
return_from_SYSCALL_64
- 0x103573
47.19% 0
4.33% 0xc30bd
- 35.93% ep_poll_callback
__wake_up_common
- __wake_up_sync_key
- 18.20% pipe_read
__vfs_read
vfs_read
sys_read
do_syscall_64
return_from_SYSCALL_64
0xfdad
- 17.73% sock_def_readable
unix_stream_sendmsg
sock_sendmsg
___sys_sendmsg
__sys_sendmsg
sys_sendmsg
do_syscall_64
return_from_SYSCALL_64
__GI___libc_sendmsg
0x12c036af1fc0
0x16a4050
0x894928ec83485354
+ 12.45% ep_scan_ready_list.constprop.12
+ 0.00% 0.00% 0.00% 0.00% 0x8 1473 1474:Chrome_ChildIOT 0 0 102 1 [k] mutex_lock [kernel]
+ 0.00% 0.00% 0.00% 0.00% 0x38 1473 1473:chrome 0 0 88 1 [k] __wake_up_common [kernel]help
Signed-off-by Jiri Olsa <[email protected]>
Cc Andi Kleen <[email protected]>
Cc David Ahern <[email protected]>
Cc Don Zickus <[email protected]>
Cc Joe Mario <[email protected]>
Cc Namhyung Kim <[email protected]>
Cc Peter Zijlstra <[email protected]>
Signed-off-by Arnaldo Carvalho de Melo <[email protected]>
--- tools/perf/builtin-c2c.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+)
tools/perf/builtin-c2c.c +67 -0
@@ -17,6 +17,7 @@#include "evsel.h" #include <asm/bug.h> #include "ui/browsers/hists.h" +#include "evlist.h" struct c2c_hists {struct hists hists;
@@ -183,6 +184,11 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,return -1 ; } + ret =sample__resolve_callchain (sample, &callchain_cursor,NULL , + evsel, &al, sysctl_perf_event_max_stack); +if (ret) + goto out; + mi =sample__resolve_mem (sample, &al);if (mi ==NULL )return -ENOMEM ;
@@ -2117,6 +2123,58 @@ static void ui_quirks(void) } } +#define CALLCHAIN_DEFAULT_OPT "graph,0.5,caller,function,percent" + +const char callchain_help[] ="Display call graph (stack chain/backtrace):\n\n" +CALLCHAIN_REPORT_HELP +"\n\t\t\t\tDefault: " CALLCHAIN_DEFAULT_OPT ; + +static int +parse_callchain_opt (const struct option *opt,const char *arg,int unset) +{ +struct callchain_param *callchain = opt->value; + + callchain->enabled = !unset; +/* +* --no-call-graph +*/ +if (unset) { + symbol_conf.use_callchain = false; + callchain->mode =CHAIN_NONE ; +return 0 ; + } + +return parse_callchain_report_opt (arg); +} + +static int setup_callchain (struct perf_evlist *evlist) +{ +u64 sample_type =perf_evlist__combined_sample_type (evlist); +enum perf_call_graph_mode mode =CALLCHAIN_NONE ; + +if ((sample_type &PERF_SAMPLE_REGS_USER ) && + (sample_type &PERF_SAMPLE_STACK_USER )) + mode =CALLCHAIN_DWARF ; +else if (sample_type &PERF_SAMPLE_BRANCH_STACK ) + mode =CALLCHAIN_LBR ; +else if (sample_type &PERF_SAMPLE_CALLCHAIN ) + mode =CALLCHAIN_FP ; + +if (!callchain_param.enabled && + callchain_param.mode !=CHAIN_NONE && + mode !=CALLCHAIN_NONE ) { + symbol_conf.use_callchain = true; +if (callchain_register_param (&callchain_param) <0 ) { +ui__error ("Can't register callchain params.\n" ); +return -EINVAL ; + } + } + + callchain_param.record_mode = mode; + callchain_param.min_percent =0 ; +return 0 ; +} +static int perf_c2c__report (int argc,const char **argv) {struct perf_session *session;
@@ -2124,6 +2182,7 @@ static int perf_c2c__report(int argc, const char **argv)struct perf_data_file file = { .mode =PERF_DATA_MODE_READ , }; +char callchain_default_opt[] =CALLCHAIN_DEFAULT_OPT ;const struct option c2c_options[] = {OPT_STRING ('k' ,"vmlinux" , &symbol_conf.vmlinux_name,"file" ,"vmlinux pathname" ),
@@ -2138,6 +2197,10 @@ static int perf_c2c__report(int argc, const char **argv)#endif OPT_BOOLEAN (0 ,"stats" , &c2c.stats_only,"Use the stdio interface" ), +OPT_CALLBACK_DEFAULT ('g' ,"call-graph" , &callchain_param, +"print_type,threshold[,print_limit],order,sort_key[,branch],value" , + callchain_help, &parse_callchain_opt, + callchain_default_opt), OPT_END() };int err =0 ;
@@ -2179,6 +2242,10 @@ static int perf_c2c__report(int argc, const char **argv) goto out; } + err =setup_callchain (session->evlist); +if (err) + goto out_session; +if (symbol__init (&session->header.env) <0 ) goto out_session;