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| author | Kan Liang <kan.liang@linux.intel.com> | 2020-03-19 13:25:15 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-04-18 09:05:01 -0300 |
| commit | 13e0c844fa097f657bd8204fd574477c34f47a0c (patch) | |
| tree | 4f6f4d1c0b86b211267dcfa80e99e91b87b60749 /tools/perf/util/top.h | |
| parent | 680d125cd522d460b24ccc8b29f03cdb62dea23e (diff) | |
| download | linux-13e0c844fa097f657bd8204fd574477c34f47a0c.tar.gz linux-13e0c844fa097f657bd8204fd574477c34f47a0c.tar.bz2 linux-13e0c844fa097f657bd8204fd574477c34f47a0c.zip | |
perf top: Add option to enable the LBR stitching approach
With the LBR stitching approach, the reconstructed LBR call stack
can break the HW limitation. However, it may reconstruct invalid call
stacks in some cases, e.g. exception handing such as setjmp/longjmp.
Also, it may impact the processing time especially when the number of
samples with stitched LBRs are huge.
Add an option to enable the approach.
The option must be used with --call-graph lbr.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-16-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/top.h')
| -rw-r--r-- | tools/perf/util/top.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h index f117d4f4821e..45dc84ddff37 100644 --- a/tools/perf/util/top.h +++ b/tools/perf/util/top.h @@ -36,6 +36,7 @@ struct perf_top { bool use_tui, use_stdio; bool vmlinux_warned; bool dump_symtab; + bool stitch_lbr; struct hist_entry *sym_filter_entry; struct evsel *sym_evsel; struct perf_session *session; |