diff options
| author | Kan Liang <kan.liang@intel.com> | 2017-06-30 17:16:56 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-07-20 15:55:51 +0300 |
| commit | 91a8c5b840f2da31280e14b6268761cf14033756 (patch) | |
| tree | f7386349f910fd48671f8d0bb82435244e13b2de /tools/perf/builtin-trace.c | |
| parent | 69d8bd8aa7d8906a1e922ae884d97f0bd7f1b269 (diff) | |
| download | linux-91a8c5b840f2da31280e14b6268761cf14033756.tar.xz | |
perf intel-pt: Always set no branch for dummy event
An earlier kernel patch allowed enabling PT and LBR at the same time on
Goldmont.
commit ccbebba4c6bf ("perf/x86/intel/pt: Bypass PT vs. LBR exclusivity
if the core supports it")
However, users still cannot use Intel PT and LBRs simultaneously. $
sudo perf record -e cycles,intel_pt//u -b -- sleep 1 Error: PMU
Hardware doesn't support sampling/overflow-interrupts.
PT implicitly adds dummy event in perf tool. dummy event is software
event which doesn't support LBR.
Always setting no branch for dummy event in Intel PT.
Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170630141656.1626-2-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-trace.c')
0 files changed, 0 insertions, 0 deletions