2022-06-13 10:03:47

by Yang Jihong

[permalink] [raw]
Subject: [RFC 03/13] perf kwork: Add softirq record support

Record softirq events irq:softirq_raise, irq:softirq_entry &
irq:softirq_exit.

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 0.736 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
dummy:HG

Record softirq events:

# perf kwork -k softirq record -o perf_kwork.date -- sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.165 MB perf_kwork.date ]

# perf evlist -i perf_kwork.date
irq:softirq_raise
irq:softirq_entry
irq:softirq_exit
dummy:HG

Signed-off-by: Yang Jihong <[email protected]>
---
tools/perf/builtin-kwork.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index 822904b2597e..0da554e04f16 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -26,6 +26,7 @@

enum kwork_class_type {
KWORK_CLASS_IRQ,
+ KWORK_CLASS_SOFTIRQ,
KWORK_CLASS_MAX,
};

@@ -80,8 +81,21 @@ static struct kwork_class kwork_irq = {
.tp_handlers = irq_tp_handlers,
};

+const struct evsel_str_handler softirq_tp_handlers[] = {
+ { "irq:softirq_raise", NULL, },
+ { "irq:softirq_entry", NULL, },
+ { "irq:softirq_exit", NULL, },
+};
+
+static struct kwork_class kwork_softirq = {
+ .name = "softirq",
+ .nr_tracepoints = 3,
+ .tp_handlers = softirq_tp_handlers,
+};
+
static struct kwork_class *kwork_class_supported_list[KWORK_CLASS_MAX] = {
[KWORK_CLASS_IRQ] = &kwork_irq,
+ [KWORK_CLASS_SOFTIRQ] = &kwork_softirq,
};

static void setup_event_list(struct perf_kwork *kwork,
--
2.30.GIT