kernel/linux.git/tools/perf/util/evswitch.c, branch v6.12.80

perf evlist: Use the right prefix for 'struct evlist' 'find' methods

2020-11-30T12:48:07+00:00

perf_evlist__ is for 'struct perf_evlist' methods, in tools/lib/perf/, go on completing this split. Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf evswitch: Add hint when not finding specified on/off events

2019-08-15T15:26:13+00:00

If the user specifies a on or off switch event and it isn't in the perf.data file, provide a hint about how to see the events in the perf.data evlist: # perf script --switch-on=syscall:sys_enter_nanosleep --switch-off=syscalls:sys_exit_nanosleep ERROR: event_on event not found (syscall:sys_enter_nanosleep) HINT: use 'perf evlist' to see the available event names # # perf evlist sched:sched_kthread_stop sched:sched_kthread_stop_ret sched:sched_waking sched:sched_wakeup sched:sched_wakeup_new sched:sched_switch sched:sched_migrate_task sched:sched_process_free sched:sched_process_exit sched:sched_wait_task sched:sched_process_wait sched:sched_process_fork sched:sched_process_exec sched:sched_stat_wait sched:sched_stat_sleep sched:sched_stat_iowait sched:sched_stat_blocked sched:sched_stat_runtime sched:sched_pi_setprio sched:sched_move_numa sched:sched_stick_numa sched:sched_swap_numa sched:sched_wake_idle_without_ipi syscalls:sys_enter_clock_nanosleep syscalls:sys_exit_clock_nanosleep syscalls:sys_enter_nanosleep syscalls:sys_exit_nanosleep # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events # # perf script --switch-on=syscalls:sys_enter_nanosleep --switch-off=syscalls:sys_exit_nanosleep sleep 20919 [001] 109866.144411: sched:sched_stat_runtime: comm=sleep pid=20919 runtime=521249 [ns] vruntime=202919398131 [ns] sleep 20919 [001] 109866.144412: sched:sched_switch: sleep:20919 [120] S ==> swapper/1:0 [120] swapper 0 [001] 109867.144568: sched:sched_waking: comm=sleep pid=20919 prio=120 target_cpu=001 swapper 0 [001] 109867.144586: sched:sched_wakeup: sleep:20919 [120] success=1 CPU:001 # Cc: Adrian Hunter Cc: Florian Weimer Cc: Jiri Olsa Cc: Namhyung Kim Cc: William Cohen Link: https://lkml.kernel.org/n/tip-iijjvdlyad973oskdq8gmi5w@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf evswitch: Move enoent error message printing to separate function

2019-08-15T15:26:04+00:00

Allows adding hints there, will be done in followup patch. Cc: Adrian Hunter Cc: Florian Weimer Cc: Jiri Olsa Cc: Namhyung Kim Cc: William Cohen Link: https://lkml.kernel.org/n/tip-1kvrdi7weuz3hxycwvarcu6v@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf evswitch: Introduce init() method to set the on/off evsels from the command line

2019-08-15T15:25:55+00:00

Another step in having all the boilerplate in just one place to then use in the other tools. Cc: Adrian Hunter Cc: Florian Weimer Cc: Jiri Olsa Cc: Namhyung Kim Cc: William Cohen Link: https://lkml.kernel.org/n/tip-snreb1wmwyjei3eefwotxp1l@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf evswitch: Move switch logic to use in other tools

2019-08-15T15:24:31+00:00

Now other tools that want switching can use an evswitch for that, just set it up and add it to the PERF_RECORD_SAMPLE processing function. Cc: Adrian Hunter Cc: Florian Weimer Cc: Jiri Olsa Cc: Namhyung Kim Cc: William Cohen Link: https://lkml.kernel.org/n/tip-b1trj1q97qwfv251l66q3noj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo