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io_uring: add completion trace event

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We currently don't have a completion event trace, add one of those. And
to better be able to match up submissions and completions, add user_data
to the submission trace as well.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2019-11-03 06:52:50 -07:00
parent 364b05fd06
commit 51c3ff62ca
2 changed files with 49 additions and 11 deletions
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6
fs/io_uring.c
View file

@ -592,6 +592,8 @@ static void io_cqring_fill_event(struct io_ring_ctx *ctx, u64 ki_user_data,
{
struct io_uring_cqe *cqe;
trace_io_uring_complete(ctx, ki_user_data, res);
/*
* If we can't get a cq entry, userspace overflowed the
* submission (by quite a lot). Increment the overflow count in
@ -2733,7 +2735,7 @@ out:
s.has_user = *mm != NULL;
s.in_async = true;
s.needs_fixed_file = true;
trace_io_uring_submit_sqe(ctx, true, true);
trace_io_uring_submit_sqe(ctx, s.sqe->user_data, true, true);
io_submit_sqe(ctx, &s, statep, &link);
submitted++;
}
@ -2913,7 +2915,7 @@ out:
s.needs_fixed_file = false;
s.ring_fd = ring_fd;
submit++;
trace_io_uring_submit_sqe(ctx, true, false);
trace_io_uring_submit_sqe(ctx, s.sqe->user_data, true, false);
io_submit_sqe(ctx, &s, statep, &link);
}

54
include/trace/events/io_uring.h
View file

@ -284,10 +284,43 @@ TRACE_EVENT(io_uring_fail_link,
TP_printk("request %p, link %p", __entry->req, __entry->link)
);
/**
* io_uring_complete - called when completing an SQE
*
* @ctx: pointer to a ring context structure
* @user_data: user data associated with the request
* @res: result of the request
*
*/
TRACE_EVENT(io_uring_complete,
TP_PROTO(void *ctx, u64 user_data, long res),
TP_ARGS(ctx, user_data, res),
TP_STRUCT__entry (
__field( void *, ctx )
__field( u64, user_data )
__field( long, res )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->user_data = user_data;
__entry->res = res;
),
TP_printk("ring %p, user_data 0x%llx, result %ld",
__entry->ctx, (unsigned long long)__entry->user_data,
__entry->res)
);
/**
* io_uring_submit_sqe - called before submitting one SQE
*
* @ctx: pointer to a ring context structure
* @ctx: pointer to a ring context structure
* @user_data: user data associated with the request
* @force_nonblock: whether a context blocking or not
* @sq_thread: true if sq_thread has submitted this SQE
*
@ -296,24 +329,27 @@ TRACE_EVENT(io_uring_fail_link,
*/
TRACE_EVENT(io_uring_submit_sqe,
TP_PROTO(void *ctx, bool force_nonblock, bool sq_thread),
TP_PROTO(void *ctx, u64 user_data, bool force_nonblock, bool sq_thread),
TP_ARGS(ctx, force_nonblock, sq_thread),
TP_ARGS(ctx, user_data, force_nonblock, sq_thread),
TP_STRUCT__entry (
__field( void *, ctx )
__field( void *, ctx )
__field( u64, user_data )
__field( bool, force_nonblock )
__field( bool, sq_thread )
__field( bool, sq_thread )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->ctx = ctx;
__entry->user_data = user_data;
__entry->force_nonblock = force_nonblock;
__entry->sq_thread = sq_thread;
__entry->sq_thread = sq_thread;
),
TP_printk("ring %p, non block %d, sq_thread %d",
__entry->ctx, __entry->force_nonblock, __entry->sq_thread)
TP_printk("ring %p, user data 0x%llx, non block %d, sq_thread %d",
__entry->ctx, (unsigned long long) __entry->user_data,
__entry->force_nonblock, __entry->sq_thread)
);
#endif /* _TRACE_IO_URING_H */