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io_uring: trace local task work run

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Add tracing for io_run_local_task_work

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220830125013.570060-8-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dylan Yudaken 2022-08-30 05:50:13 -07:00 committed by Jens Axboe
parent 21a091b970
commit f75d5036d0
2 changed files with 32 additions and 0 deletions
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29
include/trace/events/io_uring.h
View File

@ -655,6 +655,35 @@ TRACE_EVENT(io_uring_short_write,
__entry->wanted, __entry->got)
);
/*
* io_uring_local_work_run - ran ring local task work
*
* @tctx: pointer to a io_uring_ctx
* @count: how many functions it ran
* @loops: how many loops it ran
*
*/
TRACE_EVENT(io_uring_local_work_run,
TP_PROTO(void *ctx, int count, unsigned int loops),
TP_ARGS(ctx, count, loops),
TP_STRUCT__entry (
__field(void *, ctx )
__field(int, count )
__field(unsigned int, loops )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->count = count;
__entry->loops = loops;
),
TP_printk("ring %p, count %d, loops %u", __entry->ctx, __entry->count, __entry->loops)
);
#endif /* _TRACE_IO_URING_H */
/* This part must be outside protection */

3
io_uring/io_uring.c
View File

@ -1168,6 +1168,7 @@ int io_run_local_work(struct io_ring_ctx *ctx)
struct llist_node fake;
struct llist_node *current_final = NULL;
int ret;
unsigned int loops = 1;
if (unlikely(ctx->submitter_task != current)) {
/* maybe this is before any submissions */
@ -1197,6 +1198,7 @@ again:
node = io_llist_cmpxchg(&ctx->work_llist, &fake, NULL);
if (node != &fake) {
loops++;
current_final = &fake;
node = io_llist_xchg(&ctx->work_llist, &fake);
goto again;
@ -1206,6 +1208,7 @@ again:
io_submit_flush_completions(ctx);
mutex_unlock(&ctx->uring_lock);
}
trace_io_uring_local_work_run(ctx, ret, loops);
return ret;
}