kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-24 19:10:26 +00:00
Code Issues Releases Packages Activity
linux/tools/perf/bench
History
Thomas Richter fc1b20f168 perf bench: Fix perf bench syscall loop count 
[ Upstream commit 957d194163 ]

Command 'perf bench syscall fork -l 100000' offers option -l to run for
a specified number of iterations. However this option is not always
observed. The number is silently limited to 10000 iterations as can be
seen:

Output before:
 # perf bench syscall fork -l 100000
 # Running 'syscall/fork' benchmark:
 # Executed 10,000 fork() calls
     Total time: 23.388 [sec]

    2338.809800 usecs/op
            427 ops/sec
 #

When explicitly specified with option -l or --loops, also observe
higher number of iterations:

Output after:
 # perf bench syscall fork -l 100000
 # Running 'syscall/fork' benchmark:
 # Executed 100,000 fork() calls
     Total time: 716.982 [sec]

    7169.829510 usecs/op
            139 ops/sec
 #

This patch fixes the issue for basic execve fork and getpgid.

Fixes: ece7f7c050 ("perf bench syscall: Add fork syscall benchmark")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Tested-by: Athira Rajeev <atrajeev@linux.ibm.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: https://lore.kernel.org/r/20250304092349.2618082-1-tmricht@linux.ibm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-04-10 14:39:23 +02:00
..
bench.h perf bench uprobe: Add uretprobe variant of uprobe benchmarks 2024-04-12 17:54:02 -03:00
breakpoint.c perf bench breakpoint: Skip run if no breakpoints available 2023-08-23 08:39:02 -03:00
Build perf bench: Make bench its own library 2024-06-26 11:07:28 -07:00
epoll-ctl.c tools/perf: Fix perf bench epoll to enable the run when some CPU's are offline 2024-06-13 21:27:26 -07:00
epoll-wait.c perf bench: Fix undefined behavior in cmpworker() 2025-02-17 10:05:12 +01:00
evlist-open-close.c perf evlist: Rename cpus to user_requested_cpus 2022-04-01 16:19:35 -03:00
find-bit-bench.c perf bench: Avoid NDEBUG warning 2023-04-04 09:39:56 -03:00
futex-hash.c tools/perf: Fix perf bench futex to enable the run when some CPU's are offline 2024-06-13 21:26:58 -07:00
futex-lock-pi.c tools/perf: Fix perf bench futex to enable the run when some CPU's are offline 2024-06-13 21:26:58 -07:00
futex-requeue.c tools/perf: Fix perf bench futex to enable the run when some CPU's are offline 2024-06-13 21:26:58 -07:00
futex-wake-parallel.c tools/perf: Fix timing issue with parallel threads in perf bench wake-up-parallel 2024-06-13 21:27:49 -07:00
futex-wake.c tools/perf: Fix perf bench futex to enable the run when some CPU's are offline 2024-06-13 21:26:58 -07:00
futex.h Revert "perf bench futex: Add support for 32-bit systems with 64-bit time_t" 2021-11-01 11:42:54 -03:00
inject-buildid.c perf bench internals inject-build-id: Fix trap divide when collecting just one DSO 2024-05-07 12:44:02 -03:00
kallsyms-parse.c perf bench: Add kallsyms parsing 2020-05-05 16:35:32 -03:00
mem-functions.c perf bench mem: Always memset source before memcpy 2020-08-13 09:34:26 -03:00
mem-memcpy-arch.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mem-memcpy-x86-64-asm-def.h tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
mem-memcpy-x86-64-asm.S tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
mem-memset-arch.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mem-memset-x86-64-asm-def.h tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
mem-memset-x86-64-asm.S tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
numa.c perf bench numa: Fix type of loop iterator in do_work, it should be 'long' 2023-04-04 09:39:56 -03:00
pmu-scan.c perf pmu: Abstract alias/event struct 2023-08-24 10:42:46 -03:00
sched-messaging.c perf bench messaging: Kill child processes when exit abnormally in process mode 2023-09-26 21:47:12 -07:00
sched-pipe.c perf bench sched pipe: Add -G/--cgroups option 2023-10-25 10:02:10 -07:00
sched-seccomp-notify.c perf bench sched-seccomp-notify: Fix spelling mistake "synchronious" -> "synchronous" 2023-12-05 15:48:52 -03:00
synthesize.c perf tool: Constify tool pointers 2024-08-12 18:05:14 -03:00
syscall.c perf bench: Fix perf bench syscall loop count 2025-04-10 14:39:23 +02:00
uprobe.c perf bench uprobe: Add uretprobe variant of uprobe benchmarks 2024-04-12 17:54:02 -03:00