Hello All,
I am using perf to measure a multi-threaded program on kernel 3.2.23,
the system has 40 cores and there are lots of context switches during
the test. The command is:
# perf record -e sched:sched_stat_sleep -e sched:sched_switch -e
sched:sched_process_exit -g -r 0 -p 39249 sleep 5
It generates a ~1GB size perf.data. `perf report` got 2 issues:
1. A lot of this warning message:
Warning: Timestamp below last timeslice flush
2. No useful output, but this:
Found 32117 unknown events!
Is this an older tool processing a perf.data file generated by a
more recent tool?
If that is not the case, consider reporting to
linux-ker...@vger.kernel.org.
If I set a breakpoint perf_session_deliver_event(), I can see that
event->header.type is 44, which is larger than PERF_RECORD_MAX (10).
If my program is in an inactive state and less events generated,
`perf report` looks fine. Are they the knowns bugs and fixed?
Anyone can shed some light?
Thanks,
Wufei.
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