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Diffstat (limited to 'tools/perf/Documentation/perf-trace.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-trace.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 33a88e984e66..5a7035c5c523 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -63,6 +63,31 @@ filter out the startup phase of the program, which is often very different. --uid=:: Record events in threads owned by uid. Name or number. +-G:: +--cgroup:: + Record events in threads in a cgroup. + + Look for cgroups to set at the /sys/fs/cgroup/perf_event directory, then + remove the /sys/fs/cgroup/perf_event/ part and try: + + perf trace -G A -e sched:*switch + + Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc + _and_ sched:sched_switch to the 'A' cgroup, while: + + perf trace -e sched:*switch -G A + + will only set the sched:sched_switch event to the 'A' cgroup, all the + other events (raw_syscalls:sys_{enter,exit}, etc are left "without" + a cgroup (on the root cgroup, sys wide, etc). + + Multiple cgroups: + + perf trace -G A -e sched:*switch -G B + + the syscall ones go to the 'A' cgroup, the sched:sched_switch goes + to the 'B' cgroup. + --filter-pids=:: Filter out events for these pids and for 'trace' itself (comma separated list). |