mirror of
https://github.com/torvalds/linux.git
synced 2024-12-07 03:21:32 +00:00
perf evsel: Add verbose output for sys_perf_event_open fallback
Adding info about what is being switched off in the sys_perf_event_open fallback. New output (notice the 'switching off' lines): $ perf stat -e '{cycles,instructions}' -vvv ls Using CPUID GenuineIntel-6-3D intel_pt default config: tsc ------------------------------------------------------------ perf_event_attr: size 112 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 3591 cpu -1 group_fd -1 flags 0x8 sys_perf_event_open failed, error -22 switching off cloexec flag ------------------------------------------------------------ perf_event_attr: size 112 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid 3591 cpu -1 group_fd -1 flags 0 sys_perf_event_open failed, error -22 switching off exclude_guest, exclude_host ------------------------------------------------------------ perf_event_attr: size 112 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP disabled 1 inherit 1 enable_on_exec 1 ------------------------------------------------------------ sys_perf_event_open: pid 3591 cpu -1 group_fd -1 flags 0 sys_perf_event_open failed, error -22 switching off sample_id_all ------------------------------------------------------------ perf_event_attr: size 112 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP disabled 1 inherit 1 enable_on_exec 1 ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20170721121212.21414-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
5d90faf454
commit
2b04e0f882
@ -1671,31 +1671,39 @@ try_fallback:
|
||||
*/
|
||||
if (!perf_missing_features.write_backward && evsel->attr.write_backward) {
|
||||
perf_missing_features.write_backward = true;
|
||||
pr_debug2("switching off write_backward\n");
|
||||
goto out_close;
|
||||
} else if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
|
||||
perf_missing_features.clockid_wrong = true;
|
||||
pr_debug2("switching off clockid\n");
|
||||
goto fallback_missing_features;
|
||||
} else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
|
||||
perf_missing_features.clockid = true;
|
||||
pr_debug2("switching off use_clockid\n");
|
||||
goto fallback_missing_features;
|
||||
} else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
|
||||
perf_missing_features.cloexec = true;
|
||||
pr_debug2("switching off cloexec flag\n");
|
||||
goto fallback_missing_features;
|
||||
} else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
|
||||
perf_missing_features.mmap2 = true;
|
||||
pr_debug2("switching off mmap2\n");
|
||||
goto fallback_missing_features;
|
||||
} else if (!perf_missing_features.exclude_guest &&
|
||||
(evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
|
||||
perf_missing_features.exclude_guest = true;
|
||||
pr_debug2("switching off exclude_guest, exclude_host\n");
|
||||
goto fallback_missing_features;
|
||||
} else if (!perf_missing_features.sample_id_all) {
|
||||
perf_missing_features.sample_id_all = true;
|
||||
pr_debug2("switching off sample_id_all\n");
|
||||
goto retry_sample_id;
|
||||
} else if (!perf_missing_features.lbr_flags &&
|
||||
(evsel->attr.branch_sample_type &
|
||||
(PERF_SAMPLE_BRANCH_NO_CYCLES |
|
||||
PERF_SAMPLE_BRANCH_NO_FLAGS))) {
|
||||
perf_missing_features.lbr_flags = true;
|
||||
pr_debug2("switching off branch sample type no (cycles/flags)\n");
|
||||
goto fallback_missing_features;
|
||||
}
|
||||
out_close:
|
||||
|
Loading…
Reference in New Issue
Block a user