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|
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM io_uring
#if !defined(_TRACE_IO_URING_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_IO_URING_H
#include <linux/tracepoint.h>
struct io_wq_work;
/**
* io_uring_create - called after a new io_uring context was prepared
*
* @fd: corresponding file descriptor
* @ctx: pointer to a ring context structure
* @sq_entries: actual SQ size
* @cq_entries: actual CQ size
* @flags: SQ ring flags, provided to io_uring_setup(2)
*
* Allows to trace io_uring creation and provide pointer to a context, that can
* be used later to find correlated events.
*/
TRACE_EVENT(io_uring_create,
TP_PROTO(int fd, void *ctx, u32 sq_entries, u32 cq_entries, u32 flags),
TP_ARGS(fd, ctx, sq_entries, cq_entries, flags),
TP_STRUCT__entry (
__field( int, fd )
__field( void *, ctx )
__field( u32, sq_entries )
__field( u32, cq_entries )
__field( u32, flags )
),
TP_fast_assign(
__entry->fd = fd;
__entry->ctx = ctx;
__entry->sq_entries = sq_entries;
__entry->cq_entries = cq_entries;
__entry->flags = flags;
),
TP_printk("ring %p, fd %d sq size %d, cq size %d, flags %d",
__entry->ctx, __entry->fd, __entry->sq_entries,
__entry->cq_entries, __entry->flags)
);
/**
* io_uring_register - called after a buffer/file/eventfd was succesfully
* registered for a ring
*
* @ctx: pointer to a ring context structure
* @opcode: describes which operation to perform
* @nr_user_files: number of registered files
* @nr_user_bufs: number of registered buffers
* @cq_ev_fd: whether eventfs registered or not
* @ret: return code
*
* Allows to trace fixed files/buffers/eventfds, that could be registered to
* avoid an overhead of getting references to them for every operation. This
* event, together with io_uring_file_get, can provide a full picture of how
* much overhead one can reduce via fixing.
*/
TRACE_EVENT(io_uring_register,
TP_PROTO(void *ctx, unsigned opcode, unsigned nr_files,
unsigned nr_bufs, bool eventfd, long ret),
TP_ARGS(ctx, opcode, nr_files, nr_bufs, eventfd, ret),
TP_STRUCT__entry (
__field( void *, ctx )
__field( unsigned, opcode )
__field( unsigned, nr_files )
__field( unsigned, nr_bufs )
__field( bool, eventfd )
__field( long, ret )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->opcode = opcode;
__entry->nr_files = nr_files;
__entry->nr_bufs = nr_bufs;
__entry->eventfd = eventfd;
__entry->ret = ret;
),
TP_printk("ring %p, opcode %d, nr_user_files %d, nr_user_bufs %d, "
"eventfd %d, ret %ld",
__entry->ctx, __entry->opcode, __entry->nr_files,
__entry->nr_bufs, __entry->eventfd, __entry->ret)
);
/**
* io_uring_file_get - called before getting references to an SQE file
*
* @ctx: pointer to a ring context structure
* @fd: SQE file descriptor
*
* Allows to trace out how often an SQE file reference is obtained, which can
* help figuring out if it makes sense to use fixed files, or check that fixed
* files are used correctly.
*/
TRACE_EVENT(io_uring_file_get,
TP_PROTO(void *ctx, int fd),
TP_ARGS(ctx, fd),
TP_STRUCT__entry (
__field( void *, ctx )
__field( int, fd )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->fd = fd;
),
TP_printk("ring %p, fd %d", __entry->ctx, __entry->fd)
);
/**
* io_uring_queue_async_work - called before submitting a new async work
*
* @ctx: pointer to a ring context structure
* @hashed: type of workqueue, hashed or normal
* @req: pointer to a submitted request
* @work: pointer to a submitted io_wq_work
*
* Allows to trace asynchronous work submission.
*/
TRACE_EVENT(io_uring_queue_async_work,
TP_PROTO(void *ctx, int rw, void * req, struct io_wq_work *work,
unsigned int flags),
TP_ARGS(ctx, rw, req, work, flags),
TP_STRUCT__entry (
__field( void *, ctx )
__field( int, rw )
__field( void *, req )
__field( struct io_wq_work *, work )
__field( unsigned int, flags )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->rw = rw;
__entry->req = req;
__entry->work = work;
__entry->flags = flags;
),
TP_printk("ring %p, request %p, flags %d, %s queue, work %p",
__entry->ctx, __entry->req, __entry->flags,
__entry->rw ? "hashed" : "normal", __entry->work)
);
/**
* io_uring_defer_list - called before the io_uring work added into defer_list
*
* @ctx: pointer to a ring context structure
* @req: pointer to a deferred request
* @shadow: whether request is shadow or not
*
* Allows to track deferred requests, to get an insight about what requests are
* not started immediately.
*/
TRACE_EVENT(io_uring_defer,
TP_PROTO(void *ctx, void *req, bool shadow),
TP_ARGS(ctx, req, shadow),
TP_STRUCT__entry (
__field( void *, ctx )
__field( void *, req )
__field( bool, shadow )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->req = req;
__entry->shadow = shadow;
),
TP_printk("ring %p, request %p%s", __entry->ctx, __entry->req,
__entry->shadow ? ", shadow": "")
);
/**
* io_uring_link - called before the io_uring request added into link_list of
* another request
*
* @ctx: pointer to a ring context structure
* @req: pointer to a linked request
* @target_req: pointer to a previous request, that would contain @req
*
* Allows to track linked requests, to understand dependencies between requests
* and how does it influence their execution flow.
*/
TRACE_EVENT(io_uring_link,
TP_PROTO(void *ctx, void *req, void *target_req),
TP_ARGS(ctx, req, target_req),
TP_STRUCT__entry (
__field( void *, ctx )
__field( void *, req )
__field( void *, target_req )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->req = req;
__entry->target_req = target_req;
),
TP_printk("ring %p, request %p linked after %p",
__entry->ctx, __entry->req, __entry->target_req)
);
/**
* io_uring_cqring_wait - called before start waiting for an available CQE
*
* @ctx: pointer to a ring context structure
* @min_events: minimal number of events to wait for
*
* Allows to track waiting for CQE, so that we can e.g. troubleshoot
* situations, when an application wants to wait for an event, that never
* comes.
*/
TRACE_EVENT(io_uring_cqring_wait,
TP_PROTO(void *ctx, int min_events),
TP_ARGS(ctx, min_events),
TP_STRUCT__entry (
__field( void *, ctx )
__field( int, min_events )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->min_events = min_events;
),
TP_printk("ring %p, min_events %d", __entry->ctx, __entry->min_events)
);
/**
* io_uring_fail_link - called before failing a linked request
*
* @req: request, which links were cancelled
* @link: cancelled link
*
* Allows to track linked requests cancellation, to see not only that some work
* was cancelled, but also which request was the reason.
*/
TRACE_EVENT(io_uring_fail_link,
TP_PROTO(void *req, void *link),
TP_ARGS(req, link),
TP_STRUCT__entry (
__field( void *, req )
__field( void *, link )
),
TP_fast_assign(
__entry->req = req;
__entry->link = 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
* @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
*
* Allows to track SQE submitting, to understand what was the source of it, SQ
* thread or io_uring_enter call.
*/
TRACE_EVENT(io_uring_submit_sqe,
TP_PROTO(void *ctx, u64 user_data, bool force_nonblock, bool sq_thread),
TP_ARGS(ctx, user_data, force_nonblock, sq_thread),
TP_STRUCT__entry (
__field( void *, ctx )
__field( u64, user_data )
__field( bool, force_nonblock )
__field( bool, sq_thread )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->user_data = user_data;
__entry->force_nonblock = force_nonblock;
__entry->sq_thread = sq_thread
|