perf top: Add --namespaces option
Since 'perf record' already have this option, let's have it for 'perf top'
as well.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Link: http://lkml.kernel.org/r/20190522053250.207156-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 44d89fb..cfea87c 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -262,6 +262,11 @@
The number of threads to run when synthesizing events for existing processes.
By default, the number of threads equals to the number of online CPUs.
+--namespaces::
+ Record events of type PERF_RECORD_NAMESPACES and display it with the
+ 'cgroup_id' sort key.
+
+
INTERACTIVE PROMPTING KEYS
--------------------------
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index fbbb0da..31d78d8 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1208,6 +1208,9 @@ static int __cmd_top(struct perf_top *top)
init_process_thread(top);
+ if (opts->record_namespaces)
+ top->tool.namespace_events = true;
+
ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,
&top->session->machines.host,
&top->record_opts);
@@ -1500,6 +1503,8 @@ int cmd_top(int argc, const char **argv)
OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
"number of thread to run event synthesize"),
+ OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
+ "Record namespaces events"),
OPT_END()
};
struct perf_evlist *sb_evlist = NULL;