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io_uring: Add to traces the req pointer when available

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The req pointer uniquely identify a specific request.
Having it in traces can provide valuable insights that is not possible
to have if the calling process is reusing the same user_data value.

Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Olivier Langlois <olivier@trillion01.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Olivier Langlois
2021-06-16 06:41:46 -06:00
committed by Jens Axboe
parent 2335f6f5dd
commit 236daeae36
2 changed files with 59 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/trace/events/io_uring.h
+53 -18
View File
@@ -323,8 +323,10 @@ TRACE_EVENT(io_uring_complete,
* io_uring_submit_sqe - called before submitting one SQE
*
* @ctx: pointer to a ring context structure
* @req: pointer to a submitted request
* @opcode: opcode of request
* @user_data: user data associated with the request
* @flags request flags
* @force_nonblock: whether a context blocking or not
* @sq_thread: true if sq_thread has submitted this SQE
*
@@ -333,41 +335,60 @@ TRACE_EVENT(io_uring_complete,
*/
TRACE_EVENT(io_uring_submit_sqe,
TP_PROTO(void *ctx, u8 opcode, u64 user_data, bool force_nonblock,
bool sq_thread),
TP_PROTO(void *ctx, void *req, u8 opcode, u64 user_data, u32 flags,
bool force_nonblock, bool sq_thread),
TP_ARGS(ctx, opcode, user_data, force_nonblock, sq_thread),
TP_ARGS(ctx, req, opcode, user_data, flags, force_nonblock, sq_thread),
TP_STRUCT__entry (
__field( void *, ctx )
__field( void *, req )
__field( u8, opcode )
__field( u64, user_data )
__field( u32, flags )
__field( bool, force_nonblock )
__field( bool, sq_thread )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->req = req;
__entry->opcode = opcode;
__entry->user_data = user_data;
__entry->flags = flags;
__entry->force_nonblock = force_nonblock;
__entry->sq_thread = sq_thread;
),
TP_printk("ring %p, op %d, data 0x%llx, non block %d, sq_thread %d",
__entry->ctx, __entry->opcode,
(unsigned long long) __entry->user_data,
__entry->force_nonblock, __entry->sq_thread)
TP_printk("ring %p, req %p, op %d, data 0x%llx, flags %u, "
"non block %d, sq_thread %d", __entry->ctx, __entry->req,
__entry->opcode, (unsigned long long)__entry->user_data,
__entry->flags, __entry->force_nonblock, __entry->sq_thread)
);
/*
* io_uring_poll_arm - called after arming a poll wait if successful
*
* @ctx: pointer to a ring context structure
* @req: pointer to the armed request
* @opcode: opcode of request
* @user_data: user data associated with the request
* @mask: request poll events mask
* @events: registered events of interest
*
* Allows to track which fds are waiting for and what are the events of
* interest.
*/
TRACE_EVENT(io_uring_poll_arm,
TP_PROTO(void *ctx, u8 opcode, u64 user_data, int mask, int events),
TP_PROTO(void *ctx, void *req, u8 opcode, u64 user_data,
int mask, int events),
TP_ARGS(ctx, opcode, user_data, mask, events),
TP_ARGS(ctx, req, opcode, user_data, mask, events),
TP_STRUCT__entry (
__field( void *, ctx )
__field( void *, req )
__field( u8, opcode )
__field( u64, user_data )
__field( int, mask )
@@ -376,16 +397,17 @@ TRACE_EVENT(io_uring_poll_arm,
TP_fast_assign(
__entry->ctx = ctx;
__entry->req = req;
__entry->opcode = opcode;
__entry->user_data = user_data;
__entry->mask = mask;
__entry->events = events;
),
TP_printk("ring %p, op %d, data 0x%llx, mask 0x%x, events 0x%x",
__entry->ctx, __entry->opcode,
(unsigned long long) __entry->user_data,
__entry->mask, __entry->events)
TP_printk("ring %p, req %p, op %d, data 0x%llx, mask 0x%x, events 0x%x",
__entry->ctx, __entry->req, __entry->opcode,
(unsigned long long) __entry->user_data,
__entry->mask, __entry->events)
);
TRACE_EVENT(io_uring_poll_wake,
@@ -440,27 +462,40 @@ TRACE_EVENT(io_uring_task_add,
__entry->mask)
);
/*
* io_uring_task_run - called when task_work_run() executes the poll events
* notification callbacks
*
* @ctx: pointer to a ring context structure
* @req: pointer to the armed request
* @opcode: opcode of request
* @user_data: user data associated with the request
*
* Allows to track when notified poll events are processed
*/
TRACE_EVENT(io_uring_task_run,
TP_PROTO(void *ctx, u8 opcode, u64 user_data),
TP_PROTO(void *ctx, void *req, u8 opcode, u64 user_data),
TP_ARGS(ctx, opcode, user_data),
TP_ARGS(ctx, req, opcode, user_data),
TP_STRUCT__entry (
__field( void *, ctx )
__field( void *, req )
__field( u8, opcode )
__field( u64, user_data )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->req = req;
__entry->opcode = opcode;
__entry->user_data = user_data;
),
TP_printk("ring %p, op %d, data 0x%llx",
__entry->ctx, __entry->opcode,
(unsigned long long) __entry->user_data)
TP_printk("ring %p, req %p, op %d, data 0x%llx",
__entry->ctx, __entry->req, __entry->opcode,
(unsigned long long) __entry->user_data)
);
#endif /* _TRACE_IO_URING_H */