perf kwork: Add workqueue report support

Implements workqueue report function.

Test cases:

  # perf kwork -k workqueue rep

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)gc_worker                   | 0001 |   1912.389 ms |       173 |     12.896 ms |      44002.050787 s |      44002.063683 s |
    (w)mix_interrupt_randomness    | 0000 |     24.308 ms |       285 |      3.349 ms |      44004.784908 s |      44004.788257 s |
    (w)e1000_watchdog              | 0002 |      5.332 ms |         5 |      2.059 ms |      44000.914366 s |      44000.916424 s |
    (w)vmstat_update               | 0005 |      0.989 ms |         2 |      0.953 ms |      43997.986991 s |      43997.987944 s |
    (w)vmstat_shepherd             | 0000 |      0.964 ms |         8 |      0.195 ms |      43997.986453 s |      43997.986648 s |
    (w)vmstat_update               | 0003 |      0.306 ms |         6 |      0.077 ms |      44004.689543 s |      44004.689620 s |
    (w)vmstat_update               | 0000 |      0.196 ms |         5 |      0.049 ms |      44005.713732 s |      44005.713781 s |
    (w)vmstat_update               | 0001 |      0.162 ms |         2 |      0.130 ms |      44000.192034 s |      44000.192164 s |
    (w)mix_interrupt_randomness    | 0002 |      0.114 ms |         5 |      0.037 ms |      44005.012625 s |      44005.012662 s |
    (w)vmstat_update               | 0002 |      0.084 ms |         2 |      0.043 ms |      44004.817702 s |      44004.817745 s |
    (w)vmstat_update               | 0006 |      0.067 ms |         2 |      0.041 ms |      43997.987214 s |      43997.987254 s |
    (w)neigh_periodic_work         | 0004 |      0.039 ms |         1 |      0.039 ms |      43999.929935 s |      43999.929974 s |
    (w)vmstat_update               | 0007 |      0.037 ms |         1 |      0.037 ms |      43997.988969 s |      43997.989006 s |
    (w)neigh_managed_work          | 0001 |      0.036 ms |         1 |      0.036 ms |      43997.665813 s |      43997.665849 s |
    (w)neigh_managed_work          | 0004 |      0.036 ms |         1 |      0.036 ms |      44002.953507 s |      44002.953543 s |
    (w)vmstat_update               | 0004 |      0.027 ms |         1 |      0.027 ms |      43997.913973 s |      43997.914000 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k workqueue rep -S

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)gc_worker                   | 0001 |   1912.389 ms |       173 |     12.896 ms |      44002.050787 s |      44002.063683 s |
    (w)mix_interrupt_randomness    | 0000 |     24.308 ms |       285 |      3.349 ms |      44004.784908 s |      44004.788257 s |
    (w)e1000_watchdog              | 0002 |      5.332 ms |         5 |      2.059 ms |      44000.914366 s |      44000.916424 s |
    (w)vmstat_update               | 0005 |      0.989 ms |         2 |      0.953 ms |      43997.986991 s |      43997.987944 s |
    (w)vmstat_shepherd             | 0000 |      0.964 ms |         8 |      0.195 ms |      43997.986453 s |      43997.986648 s |
    (w)vmstat_update               | 0003 |      0.306 ms |         6 |      0.077 ms |      44004.689543 s |      44004.689620 s |
    (w)vmstat_update               | 0000 |      0.196 ms |         5 |      0.049 ms |      44005.713732 s |      44005.713781 s |
    (w)vmstat_update               | 0001 |      0.162 ms |         2 |      0.130 ms |      44000.192034 s |      44000.192164 s |
    (w)mix_interrupt_randomness    | 0002 |      0.114 ms |         5 |      0.037 ms |      44005.012625 s |      44005.012662 s |
    (w)vmstat_update               | 0002 |      0.084 ms |         2 |      0.043 ms |      44004.817702 s |      44004.817745 s |
    (w)vmstat_update               | 0006 |      0.067 ms |         2 |      0.041 ms |      43997.987214 s |      43997.987254 s |
    (w)neigh_periodic_work         | 0004 |      0.039 ms |         1 |      0.039 ms |      43999.929935 s |      43999.929974 s |
    (w)vmstat_update               | 0007 |      0.037 ms |         1 |      0.037 ms |      43997.988969 s |      43997.989006 s |
    (w)neigh_managed_work          | 0001 |      0.036 ms |         1 |      0.036 ms |      43997.665813 s |      43997.665849 s |
    (w)neigh_managed_work          | 0004 |      0.036 ms |         1 |      0.036 ms |      44002.953507 s |      44002.953543 s |
    (w)vmstat_update               | 0004 |      0.027 ms |         1 |      0.027 ms |      43997.913973 s |      43997.914000 s |
   --------------------------------------------------------------------------------------------------------------------------------
    Total count            :       500
    Total runtime   (msec) :  1945.085 (0.192% load average)
    Total time span (msec) : 10155.026
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k workqueue rep -n vmstat_update

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)vmstat_update               | 0005 |      0.989 ms |         2 |      0.953 ms |      43997.986991 s |      43997.987944 s |
    (w)vmstat_update               | 0003 |      0.306 ms |         6 |      0.077 ms |      44004.689543 s |      44004.689620 s |
    (w)vmstat_update               | 0000 |      0.196 ms |         5 |      0.049 ms |      44005.713732 s |      44005.713781 s |
    (w)vmstat_update               | 0001 |      0.162 ms |         2 |      0.130 ms |      44000.192034 s |      44000.192164 s |
    (w)vmstat_update               | 0002 |      0.084 ms |         2 |      0.043 ms |      44004.817702 s |      44004.817745 s |
    (w)vmstat_update               | 0006 |      0.067 ms |         2 |      0.041 ms |      43997.987214 s |      43997.987254 s |
    (w)vmstat_update               | 0007 |      0.037 ms |         1 |      0.037 ms |      43997.988969 s |      43997.989006 s |
    (w)vmstat_update               | 0004 |      0.027 ms |         1 |      0.027 ms |      43997.913973 s |      43997.914000 s |
   --------------------------------------------------------------------------------------------------------------------------------

Committer testing:

  # perf kwork -k workqueue rep -C 1 | head -20

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)commit_work                 | 0001 |     25.896 ms |         2 |     13.200 ms |      26522.906700 s |      26522.919900 s |
    (w)commit_work                 | 0001 |     13.316 ms |         1 |     13.316 ms |      26522.573246 s |      26522.586562 s |
    (w)commit_work                 | 0001 |     13.177 ms |         1 |     13.177 ms |      26522.673406 s |      26522.686583 s |
    (w)commit_work                 | 0001 |     12.630 ms |         1 |     12.630 ms |      26522.123921 s |      26522.136551 s |
    (w)btrfs_work_helper           | 0001 |      3.544 ms |         1 |      3.544 ms |      26529.131296 s |      26529.134840 s |
    (w)btrfs_work_helper           | 0001 |      3.330 ms |         1 |      3.330 ms |      26529.137698 s |      26529.141028 s |
    (w)btrfs_work_helper           | 0001 |      2.855 ms |         1 |      2.855 ms |      26529.134842 s |      26529.137697 s |
    (w)btrfs_work_helper           | 0001 |      2.757 ms |         1 |      2.757 ms |      26529.124086 s |      26529.126843 s |
    (w)btrfs_work_helper           | 0001 |      2.182 ms |         1 |      2.182 ms |      26529.141030 s |      26529.143212 s |
    (w)btrfs_work_helper           | 0001 |      1.743 ms |         1 |      1.743 ms |      26520.415335 s |      26520.417078 s |
    (w)btrfs_work_helper           | 0001 |      1.499 ms |         1 |      1.499 ms |      26529.127774 s |      26529.129272 s |
    (w)btrfs_work_helper           | 0001 |      1.446 ms |         1 |      1.446 ms |      26529.129848 s |      26529.131294 s |
    (w)btrfs_work_helper           | 0001 |      1.373 ms |         1 |      1.373 ms |      26523.808270 s |      26523.809643 s |
    (w)wb_workfn                   | 0001 |      1.165 ms |         2 |      0.763 ms |      26527.071056 s |      26527.071819 s |
    (w)btrfs_work_helper           | 0001 |      0.926 ms |         1 |      0.926 ms |      26529.126846 s |      26529.127771 s |
    (w)btrfs_work_helper           | 0001 |      0.571 ms |         1 |      0.571 ms |      26529.129275 s |      26529.129846 s |
    (w)wb_workfn                   | 0001 |      0.525 ms |         1 |      0.525 ms |      26522.975151 s |      26522.975676 s |
  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-10-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 72 insertions, 2 deletions

diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index bdfeea3d07a3..e7be2b60e64c 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -657,17 +657,87 @@ static struct kwork_class kwork_softirq = {
 	.work_name      = softirq_work_name,
 };
 
+static struct kwork_class kwork_workqueue;
+static int process_workqueue_execute_start_event(struct perf_tool *tool,
+						 struct evsel *evsel,
+						 struct perf_sample *sample,
+						 struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->entry_event)
+		return kwork->tp_handler->entry_event(kwork, &kwork_workqueue,
+						    evsel, sample, machine);
+
+	return 0;
+}
+
+static int process_workqueue_execute_end_event(struct perf_tool *tool,
+					       struct evsel *evsel,
+					       struct perf_sample *sample,
+					       struct machine *machine)
+{
+	struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+	if (kwork->tp_handler->exit_event)
+		return kwork->tp_handler->exit_event(kwork, &kwork_workqueue,
+						   evsel, sample, machine);
+
+	return 0;
+}
+
 const struct evsel_str_handler workqueue_tp_handlers[] = {
 	{ "workqueue:workqueue_activate_work", NULL, },
-	{ "workqueue:workqueue_execute_start", NULL, },
-	{ "workqueue:workqueue_execute_end",   NULL, },
+	{ "workqueue:workqueue_execute_start", process_workqueue_execute_start_event, },
+	{ "workqueue:workqueue_execute_end",   process_workqueue_execute_end_event,   },
 };
 
+static int workqueue_class_init(struct kwork_class *class,
+				struct perf_session *session)
+{
+	if (perf_session__set_tracepoints_handlers(session,
+						   workqueue_tp_handlers)) {
+		pr_err("Failed to set workqueue tracepoints handlers\n");
+		return -1;
+	}
+
+	class->work_root = RB_ROOT_CACHED;
+	return 0;
+}
+
+static void workqueue_work_init(struct kwork_class *class,
+				struct kwork_work *work,
+				struct evsel *evsel,
+				struct perf_sample *sample,
+				struct machine *machine)
+{
+	char *modp = NULL;
+	unsigned long long function_addr = evsel__intval(evsel,
+							 sample, "function");
+
+	work->class = class;
+	work->cpu = sample->cpu;
+	work->id = evsel__intval(evsel, sample, "work");
+	work->name = function_addr == 0 ? NULL :
+		machine__resolve_kernel_addr(machine, &function_addr, &modp);
+}
+
+static void workqueue_work_name(struct kwork_work *work, char *buf, int len)
+{
+	if (work->name != NULL)
+		snprintf(buf, len, "(w)%s", work->name);
+	else
+		snprintf(buf, len, "(w)0x%" PRIx64, work->id);
+}
+
 static struct kwork_class kwork_workqueue = {
 	.name           = "workqueue",
 	.type           = KWORK_CLASS_WORKQUEUE,
 	.nr_tracepoints = 3,
 	.tp_handlers    = workqueue_tp_handlers,
+	.class_init     = workqueue_class_init,
+	.work_init      = workqueue_work_init,
+	.work_name      = workqueue_work_name,
 };
 
 static struct kwork_class *kwork_class_supported_list[KWORK_CLASS_MAX] = {