Commit-ID: f99f4719b841a9745d6a7652eef3956aaf2db66a
Gitweb: http://git.kernel.org/tip/f99f4719b841a9745d6a7652eef3956aaf2db66a
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Fri, 26 Jun 2015 11:29:18 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 26 Jun 2015 11:46:57 -0300
perf stat: Introduce perf_evsel__read function
Adding simple read function that reads/store data into given struct
perf_counts_values *count object.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1435310967-14570-14-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/evsel.c | 14 ++++++++++++++
tools/perf/util/evsel.h | 3 +++
2 files changed, 17 insertions(+)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index cd6ce70..2e0a4e0 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -955,6 +955,20 @@ int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread,
return cb(evsel, cpu, thread, &count);
}
+int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
+ struct perf_counts_values *count)
+{
+ memset(count, 0, sizeof(*count));
+
+ if (FD(evsel, cpu, thread) < 0)
+ return -EINVAL;
+
+ if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0)
+ return -errno;
+
+ return 0;
+}
+
int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
int cpu, int thread, bool scale)
{
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 020f7e1..a79944a 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -236,6 +236,9 @@ typedef int (perf_evsel__read_cb_t)(struct perf_evsel *evsel,
int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread,
perf_evsel__read_cb_t cb);
+int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
+ struct perf_counts_values *count);
+
int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
int cpu, int thread, bool scale);
--
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