lkml.org 
[lkml]   [2019]   [Dec]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 8/9] perf top: Add --all-cgroups option
Date
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 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 dc80044bc46f..1aaa1b34feca 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1244,6 +1244,8 @@ 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,
@@ -1251,6 +1253,11 @@ 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);
@@ -1539,6 +1546,8 @@ 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()
};
--
2.24.1.735.g03f4e72817-goog
\
 
 \ /
  Last update: 2019-12-20 05:34    [W:0.167 / U:5.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site