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authorAdrian Hunter <adrian.hunter@intel.com>2013-08-27 11:23:12 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-08-29 16:44:26 -0300
commitb1cf6f65aa7096984836addab7cec6b5b6d4393a (patch)
tree3277b767bb9744acf84bcbdd67798ab114cb817f
parentd03f2170546d2f0c236a42706d211e15ffb64184 (diff)
perf tools: Add a function to calculate sample event size
Add perf_event__sample_event_size() which can be used when synthesizing sample events to determine how big the resulting event will be, and therefore how much memory to allocate. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1377591794-30553-11-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/event.h2
-rw-r--r--tools/perf/util/evsel.c92
2 files changed, 94 insertions, 0 deletions
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 1c80e1304e4..93130d856bf 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -229,6 +229,8 @@ int perf_event__preprocess_sample(const union perf_event *self,
const char *perf_event__name(unsigned int id);
+size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
+ u64 sample_regs_user, u64 read_format);
int perf_event__synthesize_sample(union perf_event *event, u64 type,
u64 sample_regs_user, u64 read_format,
const struct perf_sample *sample,
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 7d62373e0b6..e8745fb635a 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1465,6 +1465,98 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
return 0;
}
+size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
+ u64 sample_regs_user, u64 read_format)
+{
+ size_t sz, result = sizeof(struct sample_event);
+
+ if (type & PERF_SAMPLE_IDENTIFIER)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_IP)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_TID)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_TIME)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_ADDR)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_ID)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_STREAM_ID)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_CPU)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_PERIOD)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_READ) {
+ result += sizeof(u64);
+ if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+ result += sizeof(u64);
+ if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+ result += sizeof(u64);
+ /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
+ if (read_format & PERF_FORMAT_GROUP) {
+ sz = sample->read.group.nr *
+ sizeof(struct sample_read_value);
+ result += sz;
+ } else {
+ result += sizeof(u64);
+ }
+ }
+
+ if (type & PERF_SAMPLE_CALLCHAIN) {
+ sz = (sample->callchain->nr + 1) * sizeof(u64);
+ result += sz;
+ }
+
+ if (type & PERF_SAMPLE_RAW) {
+ result += sizeof(u32);
+ result += sample->raw_size;
+ }
+
+ if (type & PERF_SAMPLE_BRANCH_STACK) {
+ sz = sample->branch_stack->nr * sizeof(struct branch_entry);
+ sz += sizeof(u64);
+ result += sz;
+ }
+
+ if (type & PERF_SAMPLE_REGS_USER) {
+ if (sample->user_regs.abi) {
+ result += sizeof(u64);
+ sz = hweight_long(sample_regs_user) * sizeof(u64);
+ result += sz;
+ } else {
+ result += sizeof(u64);
+ }
+ }
+
+ if (type & PERF_SAMPLE_STACK_USER) {
+ sz = sample->user_stack.size;
+ result += sizeof(u64);
+ if (sz) {
+ result += sz;
+ result += sizeof(u64);
+ }
+ }
+
+ if (type & PERF_SAMPLE_WEIGHT)
+ result += sizeof(u64);
+
+ if (type & PERF_SAMPLE_DATA_SRC)
+ result += sizeof(u64);
+
+ return result;
+}
+
int perf_event__synthesize_sample(union perf_event *event, u64 type,
u64 sample_regs_user, u64 read_format,
const struct perf_sample *sample,