[tip:perf/core] perf stat: Introduce perf_counts__( new|delete|reset) functions

tip-bot for Jiri Olsa
2015-06-18T08:16:19Z

Commit-ID: 9df38e82e2a103cf42177c164a4de9d58052ac3a
Gitweb: http://git.kernel.org/tip/9df38e82e2a103cf42177c164a4de9d58052ac3a
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Sun, 14 Jun 2015 10:19:27 +0200
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 16 Jun 2015 10:34:41 -0300

perf stat: Introduce perf_counts__(new|delete|reset) functions

Move 'struct perf_counts' allocation|free|reset code into separate
functions.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1434269985-521-13-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-stat.c | 19 +++++++------------
tools/perf/util/stat.c | 28 +++++++++++++++++++++++-----
tools/perf/util/stat.h | 3 +++
3 files changed, 33 insertions(+), 17 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index b24ecee..fcf99bd 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -178,24 +178,19 @@ static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)

static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
{
- void *addr;
- size_t sz;
+ struct perf_counts *counts;

- sz = sizeof(*evsel->counts) +
- (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
+ counts = perf_counts__new(perf_evsel__nr_cpus(evsel));
+ if (counts)
+ evsel->prev_raw_counts = counts;

- addr = zalloc(sz);
- if (!addr)
- return -ENOMEM;
-
- evsel->prev_raw_counts = addr;
-
- return 0;
+ return counts ? 0 : -ENOMEM;
}

static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
{
- zfree(&evsel->prev_raw_counts);
+ perf_counts__delete(evsel->prev_raw_counts);
+ evsel->prev_raw_counts = NULL;
}

static void perf_evlist__free_stats(struct perf_evlist *evlist)
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index ac589b6..4014b70 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -95,20 +95,38 @@ void perf_stat_evsel_id_init(struct perf_evsel *evsel)
}
}

+struct perf_counts *perf_counts__new(int ncpus)
+{
+ int size = sizeof(struct perf_counts) +
+ ncpus * sizeof(struct perf_counts_values);
+
+ return zalloc(size);
+}
+
+void perf_counts__delete(struct perf_counts *counts)
+{
+ free(counts);
+}
+
+static void perf_counts__reset(struct perf_counts *counts, int ncpus)
+{
+ memset(counts, 0, (sizeof(*counts) +
+ (ncpus * sizeof(struct perf_counts_values))));
+}
+
void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
{
- memset(evsel->counts, 0, (sizeof(*evsel->counts) +
- (ncpus * sizeof(struct perf_counts_values))));
+ perf_counts__reset(evsel->counts, ncpus);
}

int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
{
- evsel->counts = zalloc((sizeof(*evsel->counts) +
- (ncpus * sizeof(struct perf_counts_values))));
+ evsel->counts = perf_counts__new(ncpus);
return evsel->counts != NULL ? 0 : -ENOMEM;
}

void perf_evsel__free_counts(struct perf_evsel *evsel)
{
- zfree(&evsel->counts);
+ perf_counts__delete(evsel->counts);
+ evsel->counts = NULL;
}
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 6a78260..093dc3c 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -62,6 +62,9 @@ void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
double avg, int cpu, enum aggr_mode aggr);

+struct perf_counts *perf_counts__new(int ncpus);
+void perf_counts__delete(struct perf_counts *counts);
+
void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus);
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
void perf_evsel__free_counts(struct perf_evsel *evsel);