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authorAdrian Hunter <adrian.hunter@intel.com>2017-05-26 11:17:38 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-06-30 17:50:55 +0300
commit644e0840ad4615e032d67adec6ee60f821b669fe (patch)
tree88db8b2f914c735ac90fdafab4f4904689dbf4da
parent38b65b0891dc129dc0a5ce148a21c481e667b395 (diff)
downloadlinux-644e0840ad4615e032d67adec6ee60f821b669fe.tar.xz
perf auxtrace: Add CPU filter support
Decoding auxtrace data can take a long time. To avoid decoding unnecessarily, filter auxtrace data that is collected per-cpu before it is decoded. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-38-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/builtin-report.c1
-rw-r--r--tools/perf/builtin-script.c1
-rw-r--r--tools/perf/util/auxtrace.c10
-rw-r--r--tools/perf/util/auxtrace.h2
4 files changed, 14 insertions, 0 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 1174a426d090..79a33eb1a10d 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -557,6 +557,7 @@ static int __cmd_report(struct report *rep)
ui__error("failed to set cpu bitmap\n");
return ret;
}
+ session->itrace_synth_opts->cpu_bitmap = rep->cpu_bitmap;
}
if (rep->show_threads) {
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index b458a0cc3544..83cdc0a61fd6 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2992,6 +2992,7 @@ int cmd_script(int argc, const char **argv)
err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
if (err < 0)
goto out_delete;
+ itrace_synth_opts.cpu_bitmap = cpu_bitmap;
}
if (!no_callchain)
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index 651c01dfa5d3..5547457566a7 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -322,6 +322,13 @@ static int auxtrace_queues__add_event_buffer(struct auxtrace_queues *queues,
return auxtrace_queues__add_buffer(queues, idx, buffer);
}
+static bool filter_cpu(struct perf_session *session, int cpu)
+{
+ unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap;
+
+ return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap);
+}
+
int auxtrace_queues__add_event(struct auxtrace_queues *queues,
struct perf_session *session,
union perf_event *event, off_t data_offset,
@@ -331,6 +338,9 @@ int auxtrace_queues__add_event(struct auxtrace_queues *queues,
unsigned int idx;
int err;
+ if (filter_cpu(session, event->auxtrace.cpu))
+ return 0;
+
buffer = zalloc(sizeof(struct auxtrace_buffer));
if (!buffer)
return -ENOMEM;
diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h
index 68e0aa40b24a..33b5e6cdf38c 100644
--- a/tools/perf/util/auxtrace.h
+++ b/tools/perf/util/auxtrace.h
@@ -74,6 +74,7 @@ enum itrace_period_type {
* @period: 'instructions' events period
* @period_type: 'instructions' events period type
* @initial_skip: skip N events at the beginning.
+ * @cpu_bitmap: CPUs for which to synthesize events, or NULL for all
*/
struct itrace_synth_opts {
bool set;
@@ -96,6 +97,7 @@ struct itrace_synth_opts {
unsigned long long period;
enum itrace_period_type period_type;
unsigned long initial_skip;
+ unsigned long *cpu_bitmap;
};
/**