Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 8/9] perf top: Add --all-cgroups option | Date | Wed, 25 Mar 2020 21:45:35 +0900 |
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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 <namhyung@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 324b6b53c86b..ddab103af8c7 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -272,6 +272,10 @@ Default is to monitor all CPUS. Record events of type PERF_RECORD_NAMESPACES and display it with the 'cgroup_id' sort key. +--all-cgroups:: + 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 d2539b793f9d..56b2dd0db88e 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1246,6 +1246,8 @@ 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, @@ -1253,6 +1255,11 @@ 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); @@ -1545,6 +1552,8 @@ 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() }; -- 2.25.1.696.g5e7596f4ac-goog
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