The --all-cgroups option is to enable cgroup profiling support. It
tells kernel to record CGROUP events in the ring buffer so that perf
report can identify task/cgroup association later.
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
tools/perf/Documentation/perf-top.txt | 4 ++++
tools/perf/builtin-top.c | 9 +++++++++
2 files changed, 13 insertions(+)
diff --git a/tools/perf/Documentation/perf-top.txt
b/tools/perf/Documentation/perf-top.txt
index 5596129a71cf..c75507f50071 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -266,6 +266,10 @@ Default is to monitor all CPUS.
Record events of type PERF_RECORD_NAMESPACES and display it with the
'cgroup_id' sort key.
+--cgroup::
+ Record events of type PERF_RECORD_CGROUP and display it with the
+ 'cgroup' sort key.
+
--switch-on EVENT_NAME::
Only consider events after this event is found.
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 5970723cd55a..f07b43c12461 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1242,6 +1242,8 @@ static int __cmd_top(struct perf_top *top)
if (opts->record_namespaces)
top->tool.namespace_events = true;
+ if (opts->record_cgroup)
+ top->tool.cgroup_events = true;
ret = perf_event__synthesize_bpf_events(top->session,
perf_event__process,
&top->session->machines.host,
@@ -1249,6 +1251,11 @@ static int __cmd_top(struct perf_top *top)
if (ret < 0)
pr_debug("Couldn't synthesize BPF events: Pre-existing BPF
programs won't have symbols resolved.\n");
+ ret = perf_event__synthesize_cgroups(&top->tool, perf_event__process,
+ &top->session->machines.host);
+ if (ret < 0)
+ pr_debug("Couldn't synthesize cgroup events.\n");
+
machine__synthesize_threads(&top->session->machines.host, &opts->target,
top->evlist->core.threads, false,
top->nr_threads_synthesize);
@@ -1537,6 +1544,8 @@ int cmd_top(int argc, const char **argv)
"number of thread to run event synthesize"),
OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
"Record namespaces events"),
+ OPT_BOOLEAN(0, "all-cgroups", &opts->record_cgroup,
+ "Record cgroup events"),
OPTS_EVSWITCH(&top.evswitch),
OPT_END()
};
--
2.23.0.187.g17f5b7556c-goog
