Merge tag 'perf-urgent-for-mingo-5.7-20200403' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgentperf-urgent-2020-04-05

Pull perf/urgent fixes and improvements from Arnaldo Carvalho de Melo:

perf python:

  Arnaldo Carvalho de Melo:

  - Fix clang detection to strip out options passed in $CC.

build:

  He Zhe:

  - Normalize gcc parameter when generating arch errno table, fixing
    the build by removing options from $(CC).

  Sam Lunt:

  - Support Python 3.8+ in Makefile.

perf report/top:

  Arnaldo Carvalho de Melo:

  - Fix title line formatting.

perf script:

  Andreas Gerstmayr:

  - Fix SEGFAULT when using DWARF mode.

  - Fix invalid read of directory entry after closedir(), found with valgrind.

  Hagen Paul Pfeifer:

  - Introduce --deltatime option.

  Stephane Eranian:

  - Allow --symbol to accept hexadecimal addresses.

  Ian Rogers:

  - Add -S/--symbols documentation

  Namhyung Kim:

  - Add --show-cgroup-events option.

perf python:

  Arnaldo Carvalho de Melo:

  - Include rwsem.c in the python binding, needed by the cgroups improvements.

build-test:

  Arnaldo Carvalho de Melo:

  - Honour JOBS to override detection of number of cores

perf top:

  Jin Yao:

  - Support --group-sort-idx to change the sort order

  - perf top: Support hotkey to change sort order

perf pmu-events x86:

  Jin Yao:

  - Use CPU_CLK_UNHALTED.THREAD in Kernel_Utilization metric

perf symbols arm64:

  Kemeng Shi:

  - Fix arm64 gap between kernel start and module end

kernel perf subsystem:

  Namhyung Kim:

  - Add PERF_RECORD_CGROUP event and Add PERF_SAMPLE_CGROUP feature,
    to allow cgroup tracking, saving a link between cgroup path and
    its id number.

perf cgroup:

  Namhyung Kim:

  - Maintain cgroup hierarchy.

perf report:

  Namhyung Kim:

  - Add 'cgroup' sort key.

perf record:

  Namhyung Kim:

  - Support synthesizing cgroup events for pre-existing cgroups.

  - Add --all-cgroups option

Documentation:

  Tony Jones:

  - Update docs regarding kernel/user space unwinding.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4c301466101b..1ab349abe904 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1397,6 +1397,11 @@ static int record__synthesize(struct record *rec, bool tail)
 	if (err < 0)
 		pr_warning("Couldn't synthesize bpf events.\n");
 
+	err = perf_event__synthesize_cgroups(tool, process_synthesized_event,
+					     machine);
+	if (err < 0)
+		pr_warning("Couldn't synthesize cgroup events.\n");
+
 	err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->core.threads,
 					    process_synthesized_event, opts->sample_address,
 					    1);
@@ -1428,6 +1433,15 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 	if (rec->opts.record_namespaces)
 		tool->namespace_events = true;
 
+	if (rec->opts.record_cgroup) {
+#ifdef HAVE_FILE_HANDLE
+		tool->cgroup_events = true;
+#else
+		pr_err("cgroup tracking is not supported\n");
+		return -1;
+#endif
+	}
+
 	if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) {
 		signal(SIGUSR2, snapshot_sig_handler);
 		if (rec->opts.auxtrace_snapshot_mode)
@@ -2358,6 +2372,8 @@ static struct option __record_options[] = {
 			"per thread proc mmap processing timeout in ms"),
 	OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces,
 		    "Record namespaces events"),
+	OPT_BOOLEAN(0, "all-cgroups", &record.opts.record_cgroup,
+		    "Record cgroup events"),
 	OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
 		    "Record context switch events"),
 	OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,