Trace Clock v3

Mathieu Desnoyers linux-arch linux-sh lkml 1 version Nov 12, 2008 In review

Get series with b4

b4 am [email protected]

Versions newest first

v1 Latest Nov 12, 200817 patches 2 repliesIn review

Patches in v1 No applies recorded yet

#	Subject and files	Size	Replies
1/17	get_cycles() : kconfig HAVE_GET_CYCLES`init/Kconfig`	+10 -0	0 replies
2/17	get_cycles() : x86 HAVE_GET_CYCLES`arch/x86/Kconfig` `arch/x86/include/asm/tsc.h`	+13 -0	2 replies
3/17	get_cycles() : sparc64 HAVE_GET_CYCLES`arch/sparc/include/asm/timex_64.h` `arch/sparc64/Kconfig` `arch/sparc64/kernel/time.c`	+21 -2	0 replies
4/17	get_cycles() : powerpc64 HAVE_GET_CYCLES`arch/powerpc/Kconfig` `arch/powerpc/include/asm/timex.h`	+12 -0	0 replies
5/17	get_cycles() : MIPS HAVE_GET_CYCLES_32`arch/mips/Kconfig` `arch/mips/include/asm/timex.h`	+29 -0	0 replies
6/17	Trace clock core`init/Kconfig` `kernel/Makefile` `kernel/trace/Makefile` +1 more	+295 -2	0 replies
7/17	Trace clock generic`include/asm-generic/trace-clock.h` `include/linux/trace-clock.h` `init/Kconfig` +2 more	+185 -0	0 replies
8/17	Powerpc : Trace clock`arch/powerpc/Kconfig` `arch/powerpc/include/asm/trace-clock.h`	+48 -0	0 replies
9/17	Sparc64 : Trace clock`arch/sparc/include/asm/trace-clock.h` `arch/sparc64/Kconfig`	+44 -0	0 replies
10/17	LTTng timestamp sh`arch/sh/Kconfig` `arch/sh/include/asm/timex.h` `arch/sh/include/asm/trace-clock.h`	+65 -2	0 replies
11/17	LTTng - TSC synchronicity test`Documentation/kernel-parameters.txt` `init/Kconfig` `kernel/time/Makefile` +1 more	+325 -0	0 replies
12/17	x86 : remove arch-specific tsc_sync.c`arch/x86/Kconfig` `arch/x86/include/asm/tsc.h` `arch/x86/kernel/Makefile` +1 more	+11 ~~-192~~	0 replies
13/17	MIPS use tsc_sync.c`arch/mips/include/asm/timex.h` `arch/mips/kernel/smp.c`	+27 -0	0 replies
14/17	MIPS : export hpt frequency for trace_clock.`arch/mips/include/asm/timex.h` `arch/mips/kernel/time.c`	+3 -0	0 replies
15/17	MIPS create empty sync_core()`arch/mips/include/asm/barrier.h`	+6 -0	0 replies
16/17	MIPS : Trace clock`arch/mips/Kconfig` `arch/mips/include/asm/timex.h` `arch/mips/include/asm/trace-clock.h` +2 more	+258 -1	0 replies
17/17	x86 trace clock`arch/x86/Kconfig` `arch/x86/kernel/Makefile` `arch/x86/kernel/trace-clock.c` +1 more	+320 -0	0 replies

Reviews trailers per patch

2 of 17 patches have a Reviewed-by or Acked-by.

Patch	David S. Miller
1/17
2/17
3/17	A-b
4/17
5/17
6/17
7/17
8/17
9/17	A-b
10/17
11/17
12/17
13/17
14/17
15/17
16/17
17/17

Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.

Read the v1 thread

Cover letter [patch 00/17] Trace Clock v3

Hi,

In this new version, I have integrated the changes I did following the comments I received for v2. I also reimplemented the "generic" trace clock so it is less intrusive and simply use a standard timer. I is not as bound to the xtime_lock as it previously was and it does not have to modify kernel/time.c anymore.

I think this is pretty close to a mergeable state. I plan to keep more exotic features, such as dealing with non-synchronized TSCs without cache-line bouncing, for future improvement. As a reminder, when the trace clock detects an unsynchronized TSC on the machine, it prints the information about which kernel command line arguments must be used so the user can have synchronized timestamp counters. However, if the user wants to use his system with non-synchronized TSCs, the cache-line bouncing fallback is used.

This patchset applies on top of 2.6.28-rc4.

Mathieu

Signature · 2 lines

Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68

Read the cover letter in its thread