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Subject[RFC v2 04/17] perf kwork: Add workqueue kwork record support
Date
Record workqueue events workqueue:workqueue_activate_work,
workqueue:workqueue_execute_start & workqueue:workqueue_execute_end

Tese cases:
Record all events:

# perf kwork record -o perf_kwork.date -- sleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 0.857 MB perf_kwork.date ]
#
# perf evlist -i perf_kwork.date
irq:irq_handler_entry
irq:irq_handler_exit
irq:softirq_raise
irq:softirq_entry
irq:softirq_exit
workqueue:workqueue_activate_work
workqueue:workqueue_execute_start
workqueue:workqueue_execute_end
dummy:HG
# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events

Record workqueue events:

# perf kwork -k workqueue record -o perf_kwork.date -- sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.081 MB perf_kwork.date ]
#
# perf evlist -i perf_kwork.date
workqueue:workqueue_activate_work
workqueue:workqueue_execute_start
workqueue:workqueue_execute_end
dummy:HG
# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
---
tools/perf/Documentation/perf-kwork.txt | 2 +-
tools/perf/builtin-kwork.c | 16 +++++++++++++++-
tools/perf/util/kwork.h | 1 +
3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Documentation/perf-kwork.txt b/tools/perf/Documentation/perf-kwork.txt
index abfdeca2ad39..c5b52f61da99 100644
--- a/tools/perf/Documentation/perf-kwork.txt
+++ b/tools/perf/Documentation/perf-kwork.txt
@@ -32,7 +32,7 @@ OPTIONS

-k::
--kwork::
- List of kwork to profile (irq, softirq, etc)
+ List of kwork to profile (irq, softirq, workqueue, etc)

-v::
--verbose::
diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index 2c492c8fd019..8086236b7513 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -50,9 +50,23 @@ static struct kwork_class kwork_softirq = {
.tp_handlers = softirq_tp_handlers,
};

+const struct evsel_str_handler workqueue_tp_handlers[] = {
+ { "workqueue:workqueue_activate_work", NULL, },
+ { "workqueue:workqueue_execute_start", NULL, },
+ { "workqueue:workqueue_execute_end", NULL, },
+};
+
+static struct kwork_class kwork_workqueue = {
+ .name = "workqueue",
+ .type = KWORK_CLASS_WORKQUEUE,
+ .nr_tracepoints = 3,
+ .tp_handlers = workqueue_tp_handlers,
+};
+
static struct kwork_class *kwork_class_supported_list[KWORK_CLASS_MAX] = {
[KWORK_CLASS_IRQ] = &kwork_irq,
[KWORK_CLASS_SOFTIRQ] = &kwork_softirq,
+ [KWORK_CLASS_WORKQUEUE] = &kwork_workqueue,
};

static void setup_event_list(struct perf_kwork *kwork,
@@ -159,7 +173,7 @@ int cmd_kwork(int argc, const char **argv)
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_STRING('k', "kwork", &kwork.event_list_str, "kwork",
- "list of kwork to profile (irq, softirq, etc)"),
+ "list of kwork to profile (irq, softirq, workqueue, etc)"),
OPT_BOOLEAN('f', "force", &kwork.force, "don't complain, do it"),
OPT_END()
};
diff --git a/tools/perf/util/kwork.h b/tools/perf/util/kwork.h
index 669a81626cb4..03203c4deb34 100644
--- a/tools/perf/util/kwork.h
+++ b/tools/perf/util/kwork.h
@@ -15,6 +15,7 @@
enum kwork_class_type {
KWORK_CLASS_IRQ,
KWORK_CLASS_SOFTIRQ,
+ KWORK_CLASS_WORKQUEUE,
KWORK_CLASS_MAX,
};

--
2.30.GIT
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