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| author | Kan Liang <kan.liang@linux.intel.com> | 2024-08-13 19:02:02 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2024-08-14 16:20:40 +0300 |
| commit | 3a867a6dadb2d67b85cbf9bc67eca2428075a109 (patch) | |
| tree | cdcd5fe754d21dba93d6b71988e32ffa901ca669 /tools/perf/util/evlist.h | |
| parent | 183212a45e5fe66e7f6cbd360d186174b013d023 (diff) | |
| download | linux-3a867a6dadb2d67b85cbf9bc67eca2428075a109.tar.xz | |
perf evlist: Save branch counters information
The branch counters logging (A.K.A LBR event logging) introduces a
per-counter indication of precise event occurrences in LBRs. The kernel
only dumps the number of occurrences into a record. The perf tool has
to map the number to the corresponding event.
Add evlist__update_br_cntr() to go through the evlist to pick the
events that are configured to be logged. Assign a logical idx to track
them, and add the total number of the events in the leader event.
The total number will be used to allocate the space to save the branch
counters for a block. The logical idx will be used to locate the
corresponding event quickly in the following patches.
It only needs to iterate the evlist once. The
evsel__has_branch_counters() is also optimized.
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20240813160208.2493643-4-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evlist.h')
| -rw-r--r-- | tools/perf/util/evlist.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index cccc34da5a02..b46f1a320783 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -57,6 +57,7 @@ struct evlist { bool enabled; int id_pos; int is_pos; + int nr_br_cntr; u64 combined_sample_type; enum bkw_mmap_state bkw_mmap_state; struct { @@ -219,6 +220,7 @@ int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel, u64 __evlist__combined_sample_type(struct evlist *evlist); u64 evlist__combined_sample_type(struct evlist *evlist); u64 evlist__combined_branch_type(struct evlist *evlist); +void evlist__update_br_cntr(struct evlist *evlist); bool evlist__sample_id_all(struct evlist *evlist); u16 evlist__id_hdr_size(struct evlist *evlist); |