perf test: Validate PERF_RECORD_ events and perf_sample fields
This new test will validate these new routines extracted from 'perf
record':
- perf_evlist__config_attrs
- perf_evlist__prepare_workload
- perf_evlist__start_workload
In addition to several other perf_evlist methods.
It consists of starting a simple workload, setting up just one event to
monitor ("cycles") requesting that several PERF_SAMPLE_ fields be
present in all events.
It then will check that the expected PERF_RECORD_ events are produced
and will sanity check all its fields.
Some checks performed:
. PERF_SAMPLE_TIME monotonically increases.
. PERF_SAMPLE_CPU is the one requested with sched_setaffinity
. PERF_SAMPLE_TID and PERF_SAMPLE_PID matches the one we forked
in perf_evlist__prepare_workload and that is stored in
evlist->workload.pid
. For the events where these fields are also present in its
pre-sample_id_all fields (e.g. event->mmap.pid), that they are what
is expected too.
. That we get a bunch of mmaps:
PATH/libcSUFFIX
PATH/ldSUFFIX
[vdso]
PATH/sleep
Example:
[root@emilia ~]# taskset -c 3,4 perf test -v1 perf_sample
6: Validate PERF_RECORD_* events & perf_sample fields:
--- start ---
7159480799825 3 PERF_RECORD_SAMPLE
7159480805584 3 PERF_RECORD_SAMPLE
7159480807814 3 PERF_RECORD_SAMPLE
7159480810430 3 PERF_RECORD_SAMPLE
7159480861511 3 PERF_RECORD_MMAP 8086/8086: [0x7fffffffd000(0x2000) @ 0x7fffffffd000]: //anon
7159481052516 3 PERF_RECORD_COMM: sleep:8086
7159481070188 3 PERF_RECORD_MMAP 8086/8086: [0x400000(0x6000) @ 0]: /bin/sleep
7159481077104 3 PERF_RECORD_MMAP 8086/8086: [0x3d06400000(0x221000) @ 0]: /lib64/ld-2.12.so
7159481092912 3 PERF_RECORD_MMAP 8086/8086: [0x7fff1adff000(0x1000) @ 0x7fff1adff000]: [vdso]
7159481196779 3 PERF_RECORD_MMAP 8086/8086: [0x3d06800000(0x37f000) @ 0]: /lib64/libc-2.12.so
7160481558435 3 PERF_RECORD_EXIT(8086:8086):(8086:8086)
---- end ----
Validate PERF_RECORD_* events & perf_sample fields: Ok
[root@emilia ~]#
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-svag18v2z4idas0dyz3umjpq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 file changed