kernel/git/next/linux-next.git/tools/perf/bench/sched-messaging.c, branch master

perf bench messaging: Fix the formatting issue when printing.

2026-09-17T15:27:34+00:00

The unsigned int type should use the %u format specifier when printing with printf or related functions. Signed-off-by: liujing Reviewed-by: Ian Rogers Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Use calloc() where applicable

2026-04-09T02:21:05+00:00

Instead of using zalloc(nr_entries * sizeof_entry) that is what calloc() does. In some places where linux/zalloc.h isn't needed, remove it, add when needed and was getting it indirectly. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim

perf bench messaging: Kill child processes when exit abnormally in process mode

2023-09-27T04:47:12+00:00

When exit abnormally in process mode, customize SIGINT and SIGTERM signal handler to kill the forked child processes. Before: # perf bench sched messaging -l 1000000 -g 1 & [1] 8519 # # Running 'sched/messaging' benchmark: # pgrep sched-messaging | wc -l 41 # kill -15 8519 [1]+ Terminated perf bench sched messaging -l 1000000 -g 1 # pgrep sched-messaging | wc -l 40 After: # perf bench sched messaging -l 1000000 -g 1 & [1] 8472 # # Running 'sched/messaging' benchmark: # pgrep sched-messaging | wc -l 41 # kill -15 8472 [1]+ Exit 1 perf bench sched messaging -l 1000000 -g 1 # pgrep sched-messaging | wc -l 0 Signed-off-by: Yang Jihong Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20230923093037.961232-5-yangjihong1@huawei.com [ namhyung: fix a whitespace ] Signed-off-by: Namhyung Kim

perf bench messaging: Store chlid process pid when creating worker for process mode

2023-09-27T04:47:12+00:00

To save pid of child processes when creating worker: 1. The messaging worker is changed to `union` type to store thread id and process pid. 2. Save child process pid in create_process_worker(). 3. Rename `pth_tab` as `work_tab`. Test result: # perf bench sched messaging # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 10 groups == 400 processes run Total time: 6.744 [sec] # perf bench sched messaging -t # Running 'sched/messaging' benchmark: # 20 sender and receiver threads per group # 10 groups == 400 threads run Total time: 5.788 [sec] Signed-off-by: Yang Jihong Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20230923093037.961232-4-yangjihong1@huawei.com Signed-off-by: Namhyung Kim

perf bench messaging: Factor out create_worker()

2023-09-27T04:47:12+00:00

Refactor the create_worker() helper: 1. Modify the return value and use pthread pointer as a parameter to facilitate value assignment in create_worker(). 2. The thread worker creation and process worker creation are abstracted into independent helpers. No functional change. Test result: # perf bench sched messaging # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 10 groups == 400 processes run Total time: 6.332 [sec] # perf bench sched messaging -t # Running 'sched/messaging' benchmark: # 20 sender and receiver threads per group # 10 groups == 400 threads run Total time: 5.545 [sec] Signed-off-by: Yang Jihong Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20230923093037.961232-3-yangjihong1@huawei.com Signed-off-by: Namhyung Kim

perf bench messaging: Fix coding style issues for sched-messaging

2023-09-27T04:47:12+00:00

Fixed several code style issues in sched-messaging: 1. Use one space around "-" and "+" operators. 2. When a long line is broken, the operator is at the end of the line. Signed-off-by: Yang Jihong Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20230923093037.961232-2-yangjihong1@huawei.com Signed-off-by: Namhyung Kim

perf bench sched messaging: Free contexts on exit

2023-06-12T21:18:14+00:00

Place sender and receiver contexts onto lists so that they may be freed on exit. Add missing pthread_attr_destroy. Fixes memory leaks reported by leak sanitizer. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: André Almeida Cc: Darren Hart Cc: Davidlohr Bueso Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Gleixner Link: https://lore.kernel.org/r/20230611233610.953456-5-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

Revert "perf bench: Fix two memory leaks detected with ASan"

2021-12-07T00:57:52+00:00

This: This reverts commit 92723ea0f11d92496687db8c9725248e9d1e5e1d. # perf test 91 91: perf stat --bpf-counters test :RRRRRRRRRRRRR FAILED! # perf test 91 91: perf stat --bpf-counters test :RRRRRRRRRRRRR FAILED! # perf test 91 91: perf stat --bpf-counters test :RRRRRRRRRRRR FAILED! # perf test 91 91: perf stat --bpf-counters test :RRRRRRRRRRRRRRRRRR Ok # perf test 91 91: perf stat --bpf-counters test :RRRRRRRRR FAILED! # perf test 91 91: perf stat --bpf-counters test :RRRRRRRRRRR Ok # perf test 91 91: perf stat --bpf-counters test :RRRRRRRRRRRRRRR Ok yep, it seems the perf bench is broken so the counts won't correlated if I revert this one: 92723ea0f11d perf bench: Fix two memory leaks detected with ASan it works for me again.. it seems to break -t option [root@dell-r440-01 perf]# ./perf bench sched messaging -g 1 -l 100 -t # Running 'sched/messaging' benchmark: RRRperf: CLIENT: ready write: Bad file descriptor Rperf: SENDER: write: Bad file descriptor Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Ian Rogers Cc: Namhyung Kim Cc: Sohaib Mohamed Cc: Song Liu Link: https://lore.kernel.org/lkml/YZev7KClb%2Fud43Lc@krava/ Signed-off-by: Arnaldo Carvalho de Melo

perf bench: Fix two memory leaks detected with ASan

2021-11-18T13:08:07+00:00

ASan reports memory leaks while running: $ perf bench sched all Fixes: e27454cc6352c422 ("perf bench: Add sched-messaging.c: Benchmark for scheduler and IPC mechanisms based on hackbench") Signed-off-by: Sohaib Mohamed Acked-by: Ian Rogers Cc: Alexander Shishkin Cc: Hitoshi Mitake Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Paul Russel Cc: Peter Zijlstra Cc: Pierre Gondois Link: http://lore.kernel.org/lkml/20211110022012.16620-1-sohaib.amhmd@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Cast (struct timeval).tv_sec when printing

2021-03-06T19:54:24+00:00

The musl-libc [1] defines (struct timeval).tv_sec as a 'long long' for arm and other architectures. The default build having a '-Wformat' flag, not casting the field when printing prevents from building perf. This patch casts the (struct timeval).tv_sec fields to the expected format. [1] git://git.musl-libc.org/musl Signed-off-by: Pierre Gondois Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Douglas.raillard@arm.com Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210224182410.5366-1-Pierre.Gondois@arm.com Signed-off-by: Arnaldo Carvalho de Melo