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>
.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] = {
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