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 44d89fb9c788e45e162f67ddd4aee70c5562b17a..cfea87c6f38e531963a24c94d0a6b05b174b8936 100644 (file)
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -262,6 +262,11 @@ Default is to monitor all CPUS.
        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 fbbb0da43abbad579f354ac909a6ffccec14b5ce..31d78d874fc7b567b3ee652b1a82b7b0a808e922 100644 (file)
--- 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;