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authorAdrian Hunter <adrian.hunter@intel.com>2022-07-11 12:31:48 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-07-20 17:07:48 +0300
commit0a64de04c94ad4285120bed0dfb382ea98d6d499 (patch)
tree571a8a6c3b4f8f5eb2c8efe8610ca4e1ea1d7244 /tools/perf/util/evsel.c
parenteddc6e3f6684597924f368cb564d7432b2f7d23e (diff)
downloadlinux-0a64de04c94ad4285120bed0dfb382ea98d6d499.tar.xz
perf tools: Factor out evsel__id_hdr_size()
Factor out evsel__id_hdr_size() so it can be reused. This is needed by perf inject. When injecting events from a guest perf.data file, there is a possibility that the sample ID numbers conflict. To re-write an ID sample, the old one needs to be removed first, which means determining how big it is with evsel__id_hdr_size() and then subtracting that from the event size. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: kvm@vger.kernel.org Link: https://lore.kernel.org/r/20220711093218.10967-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.c')
-rw-r--r--tools/perf/util/evsel.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index a67cc3f2fa74..9a30ccb7b104 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2724,6 +2724,32 @@ int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
return 0;
}
+u16 evsel__id_hdr_size(struct evsel *evsel)
+{
+ u64 sample_type = evsel->core.attr.sample_type;
+ u16 size = 0;
+
+ if (sample_type & PERF_SAMPLE_TID)
+ size += sizeof(u64);
+
+ if (sample_type & PERF_SAMPLE_TIME)
+ size += sizeof(u64);
+
+ if (sample_type & PERF_SAMPLE_ID)
+ size += sizeof(u64);
+
+ if (sample_type & PERF_SAMPLE_STREAM_ID)
+ size += sizeof(u64);
+
+ if (sample_type & PERF_SAMPLE_CPU)
+ size += sizeof(u64);
+
+ if (sample_type & PERF_SAMPLE_IDENTIFIER)
+ size += sizeof(u64);
+
+ return size;
+}
+
struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
{
return tep_find_field(evsel->tp_format, name);