[tip:perfcounters/urgent] perf-report: Add modes for inherited stats and no-samples

tip-bot for Peter Zijlstra
2009-06-25T19:45:01Z

Commit-ID: 649c48a9e7fafcc72bfcc99471d9dea98d789d59
Gitweb: http://git.kernel.org/tip/649c48a9e7fafcc72bfcc99471d9dea98d789d59
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Wed, 24 Jun 2009 21:12:48 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 25 Jun 2009 21:39:08 +0200

perf-report: Add modes for inherited stats and no-samples

Now that we can collect per task statistics, add modes that
make use of that facility.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
tools/perf/builtin-record.c | 19 +++++++++++++++++--
1 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f4f0240..798a56d 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -41,6 +41,8 @@ static int force = 0;
static int append_file = 0;
static int call_graph = 0;
static int verbose = 0;
+static int inherit_stat = 0;
+static int no_samples = 0;

static long samples;
static struct timeval last_read;
@@ -393,6 +395,12 @@ static void create_counter(int counter, int cpu, pid_t pid)
attr->sample_freq = freq;
}

+ if (no_samples)
+ attr->sample_freq = 0;
+
+ if (inherit_stat)
+ attr->inherit_stat = 1;
+
if (call_graph)
attr->sample_type |= PERF_SAMPLE_CALLCHAIN;

@@ -571,7 +579,7 @@ static int __cmd_record(int argc, const char **argv)
}
}

- while (!done) {
+ for (;;) {
int hits = samples;

for (i = 0; i < nr_cpu; i++) {
@@ -579,8 +587,11 @@ static int __cmd_record(int argc, const char **argv)
mmap_read(&mmap_array[i][counter]);
}

- if (hits == samples)
+ if (hits == samples) {
+ if (done)
+ break;
ret = poll(event_array, nr_poll, 100);
+ }
}

/*
@@ -629,6 +640,10 @@ static const struct option options[] = {
"do call-graph (stack chain/backtrace) recording"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
+ OPT_BOOLEAN('s', "stat", &inherit_stat,
+ "per thread counts"),
+ OPT_BOOLEAN('n', "no-samples", &no_samples,
+ "don't sample"),
OPT_END()
};