[Patch v1 09/10] perf record: add support for mem access profiling

Stephane Eranian
2012-10-29T15:16:27Z

Add the -l option to perf record to enable sampling
access cost sampling.

Data address sampling is obtained via the -d option.

Signed-off-by: Stephane Eranian <eranian@google.com>
---
tools/perf/builtin-record.c | 2 ++
tools/perf/perf.h | 1 +
tools/perf/util/evsel.c | 6 ++++++
3 files changed, 9 insertions(+)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 53c9892..cafe5d9 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1040,6 +1040,8 @@ const struct option record_options[] = {
OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
"branch filter mask", "branch stack filter modes",
parse_branch_stack),
+ OPT_BOOLEAN('l', "cost", &record.opts.cost,
+ "event cost"),
OPT_END()
};

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index c50985e..ea2db82 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -236,6 +236,7 @@ struct perf_record_opts {
bool sample_id_all_missing;
bool exclude_guest_missing;
bool period;
+ bool cost;
unsigned int freq;
unsigned int mmap_pages;
unsigned int user_freq;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index c82a271..6f84fbc 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -474,6 +474,12 @@ void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts,
attr->sample_type |= PERF_SAMPLE_CPU;
}

+ if (opts->cost)
+ attr->sample_type |= PERF_SAMPLE_COST;
+
+ if (opts->sample_address)
+ attr->sample_type |= PERF_SAMPLE_DSRC;
+
if (opts->no_delay) {
attr->watermark = 0;
attr->wakeup_events = 1;
--
1.7.9.5