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Commit 763be8c0 authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Greg Kroah-Hartman
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lttng instrumentation: tracepoint events 



Modifications to the in-kernel TRACE_EVENT are needed to generate the
compact event descriptions and the probe code LTTng generates. These
changes could apply to upstream TRACE_EVENT, but requires changing the
in-kernel API.

Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 69e1242e

drivers/staging/lttng/instrumentation/events/README

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Original line number Diff line number Diff line 
The workflow for updating patches from newer kernel:



Diff mainline/ and lttng-module/ directories.



Pull the new headers from mainline kernel to mainline/.

Copy them into lttng-modules.

Apply diff. Fix conflicts.

drivers/staging/lttng/instrumentation/events/lttng-module/block.h

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Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM block



#if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_BLOCK_H



#include <linux/blktrace_api.h>

#include <linux/blkdev.h>

#include <linux/tracepoint.h>

#include <linux/trace_seq.h>



#ifndef _TRACE_BLOCK_DEF_

#define _TRACE_BLOCK_DEF_



#define __blk_dump_cmd(cmd, len)	"<unknown>"



enum {

	RWBS_FLAG_WRITE		= (1 << 0),

	RWBS_FLAG_DISCARD	= (1 << 1),

	RWBS_FLAG_READ		= (1 << 2),

	RWBS_FLAG_RAHEAD	= (1 << 3),

	RWBS_FLAG_SYNC		= (1 << 4),

	RWBS_FLAG_META		= (1 << 5),

	RWBS_FLAG_SECURE	= (1 << 6),

};



#endif /* _TRACE_BLOCK_DEF_ */



#define __print_rwbs_flags(rwbs)		\

	__print_flags(rwbs, "",			\

		{ RWBS_FLAG_WRITE, "W" },	\

		{ RWBS_FLAG_DISCARD, "D" },	\

		{ RWBS_FLAG_READ, "R" },	\

		{ RWBS_FLAG_RAHEAD, "A" },	\

		{ RWBS_FLAG_SYNC, "S" },	\

		{ RWBS_FLAG_META, "M" },	\

		{ RWBS_FLAG_SECURE, "E" })



#define blk_fill_rwbs(rwbs, rw, bytes)					      \

		tp_assign(rwbs, ((rw) & WRITE ? RWBS_FLAG_WRITE :	      \

			( (rw) & REQ_DISCARD ? RWBS_FLAG_DISCARD :	      \

			( (bytes) ? RWBS_FLAG_READ :			      \

			( 0 ))))					      \

			| ((rw) & REQ_RAHEAD ? RWBS_FLAG_RAHEAD : 0)	      \

			| ((rw) & REQ_SYNC ? RWBS_FLAG_SYNC : 0)	      \

			| ((rw) & REQ_META ? RWBS_FLAG_META : 0)	      \

			| ((rw) & REQ_SECURE ? RWBS_FLAG_SECURE : 0))



DECLARE_EVENT_CLASS(block_rq_with_error,



	TP_PROTO(struct request_queue *q, struct request *rq),



	TP_ARGS(q, rq),



	TP_STRUCT__entry(

		__field(  dev_t,	dev			)

		__field(  sector_t,	sector			)

		__field(  unsigned int,	nr_sector		)

		__field(  int,		errors			)

		__field(  unsigned int,	rwbs			)

		__dynamic_array_hex( unsigned char,	cmd,

			(rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

				rq->cmd_len : 0)

	),



	TP_fast_assign(

		tp_assign(dev, rq->rq_disk ? disk_devt(rq->rq_disk) : 0)

		tp_assign(sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

					0 : blk_rq_pos(rq))

		tp_assign(nr_sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

					0 : blk_rq_sectors(rq))

		tp_assign(errors, rq->errors)

		blk_fill_rwbs(rwbs, rq->cmd_flags, blk_rq_bytes(rq))

		tp_memcpy_dyn(cmd, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

					rq->cmd : NULL);

	),



	TP_printk("%d,%d %s (%s) %llu + %u [%d]",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  __blk_dump_cmd(__get_dynamic_array(cmd),

				 __get_dynamic_array_len(cmd)),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector, __entry->errors)

)



/**

 * block_rq_abort - abort block operation request

 * @q: queue containing the block operation request

 * @rq: block IO operation request

 *

 * Called immediately after pending block IO operation request @rq in

 * queue @q is aborted. The fields in the operation request @rq

 * can be examined to determine which device and sectors the pending

 * operation would access.

 */

DEFINE_EVENT(block_rq_with_error, block_rq_abort,



	TP_PROTO(struct request_queue *q, struct request *rq),



	TP_ARGS(q, rq)

)



/**

 * block_rq_requeue - place block IO request back on a queue

 * @q: queue holding operation

 * @rq: block IO operation request

 *

 * The block operation request @rq is being placed back into queue

 * @q.  For some reason the request was not completed and needs to be

 * put back in the queue.

 */

DEFINE_EVENT(block_rq_with_error, block_rq_requeue,



	TP_PROTO(struct request_queue *q, struct request *rq),



	TP_ARGS(q, rq)

)



/**

 * block_rq_complete - block IO operation completed by device driver

 * @q: queue containing the block operation request

 * @rq: block operations request

 *

 * The block_rq_complete tracepoint event indicates that some portion

 * of operation request has been completed by the device driver.  If

 * the @rq->bio is %NULL, then there is absolutely no additional work to

 * do for the request. If @rq->bio is non-NULL then there is

 * additional work required to complete the request.

 */

DEFINE_EVENT(block_rq_with_error, block_rq_complete,



	TP_PROTO(struct request_queue *q, struct request *rq),



	TP_ARGS(q, rq)

)



DECLARE_EVENT_CLASS(block_rq,



	TP_PROTO(struct request_queue *q, struct request *rq),



	TP_ARGS(q, rq),



	TP_STRUCT__entry(

		__field(  dev_t,	dev			)

		__field(  sector_t,	sector			)

		__field(  unsigned int,	nr_sector		)

		__field(  unsigned int,	bytes			)

		__field(  unsigned int,	rwbs			)

		__array_text(  char,         comm,   TASK_COMM_LEN   )

		__dynamic_array_hex( unsigned char,	cmd,

			(rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

				rq->cmd_len : 0)

	),



	TP_fast_assign(

		tp_assign(dev, rq->rq_disk ? disk_devt(rq->rq_disk) : 0)

		tp_assign(sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

					0 : blk_rq_pos(rq))

		tp_assign(nr_sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

					0 : blk_rq_sectors(rq))

		tp_assign(bytes, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

					blk_rq_bytes(rq) : 0)

		blk_fill_rwbs(rwbs, rq->cmd_flags, blk_rq_bytes(rq))

		tp_memcpy_dyn(cmd, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?

					rq->cmd : NULL);

		tp_memcpy(comm, current->comm, TASK_COMM_LEN)

	),



	TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  __entry->bytes,

		  __blk_dump_cmd(__get_dynamic_array(cmd),

				 __get_dynamic_array_len(cmd)),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector, __entry->comm)

)



/**

 * block_rq_insert - insert block operation request into queue

 * @q: target queue

 * @rq: block IO operation request

 *

 * Called immediately before block operation request @rq is inserted

 * into queue @q.  The fields in the operation request @rq struct can

 * be examined to determine which device and sectors the pending

 * operation would access.

 */

DEFINE_EVENT(block_rq, block_rq_insert,



	TP_PROTO(struct request_queue *q, struct request *rq),



	TP_ARGS(q, rq)

)



/**

 * block_rq_issue - issue pending block IO request operation to device driver

 * @q: queue holding operation

 * @rq: block IO operation operation request

 *

 * Called when block operation request @rq from queue @q is sent to a

 * device driver for processing.

 */

DEFINE_EVENT(block_rq, block_rq_issue,



	TP_PROTO(struct request_queue *q, struct request *rq),



	TP_ARGS(q, rq)

)



/**

 * block_bio_bounce - used bounce buffer when processing block operation

 * @q: queue holding the block operation

 * @bio: block operation

 *

 * A bounce buffer was used to handle the block operation @bio in @q.

 * This occurs when hardware limitations prevent a direct transfer of

 * data between the @bio data memory area and the IO device.  Use of a

 * bounce buffer requires extra copying of data and decreases

 * performance.

 */

TRACE_EVENT(block_bio_bounce,



	TP_PROTO(struct request_queue *q, struct bio *bio),



	TP_ARGS(q, bio),



	TP_STRUCT__entry(

		__field( dev_t,		dev			)

		__field( sector_t,	sector			)

		__field( unsigned int,	nr_sector		)

		__field( unsigned int,	rwbs			)

		__array_text( char,		comm,	TASK_COMM_LEN	)

	),



	TP_fast_assign(

		tp_assign(dev, bio->bi_bdev ?

					  bio->bi_bdev->bd_dev : 0)

		tp_assign(sector, bio->bi_sector)

		tp_assign(nr_sector, bio->bi_size >> 9)

		blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)

		tp_memcpy(comm, current->comm, TASK_COMM_LEN)

	),



	TP_printk("%d,%d %s %llu + %u [%s]",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector, __entry->comm)

)



/**

 * block_bio_complete - completed all work on the block operation

 * @q: queue holding the block operation

 * @bio: block operation completed

 * @error: io error value

 *

 * This tracepoint indicates there is no further work to do on this

 * block IO operation @bio.

 */

TRACE_EVENT(block_bio_complete,



	TP_PROTO(struct request_queue *q, struct bio *bio, int error),



	TP_ARGS(q, bio, error),



	TP_STRUCT__entry(

		__field( dev_t,		dev		)

		__field( sector_t,	sector		)

		__field( unsigned,	nr_sector	)

		__field( int,		error		)

		__field( unsigned int,	rwbs		)

	),



	TP_fast_assign(

		tp_assign(dev, bio->bi_bdev->bd_dev)

		tp_assign(sector, bio->bi_sector)

		tp_assign(nr_sector, bio->bi_size >> 9)

		tp_assign(error, error)

		blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)

	),



	TP_printk("%d,%d %s %llu + %u [%d]",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector, __entry->error)

)



DECLARE_EVENT_CLASS(block_bio,



	TP_PROTO(struct request_queue *q, struct bio *bio),



	TP_ARGS(q, bio),



	TP_STRUCT__entry(

		__field( dev_t,		dev			)

		__field( sector_t,	sector			)

		__field( unsigned int,	nr_sector		)

		__field( unsigned int,	rwbs			)

		__array_text( char,		comm,	TASK_COMM_LEN	)

	),



	TP_fast_assign(

		tp_assign(dev, bio->bi_bdev->bd_dev)

		tp_assign(sector, bio->bi_sector)

		tp_assign(nr_sector, bio->bi_size >> 9)

		blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)

		tp_memcpy(comm, current->comm, TASK_COMM_LEN)

	),



	TP_printk("%d,%d %s %llu + %u [%s]",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector, __entry->comm)

)



/**

 * block_bio_backmerge - merging block operation to the end of an existing operation

 * @q: queue holding operation

 * @bio: new block operation to merge

 *

 * Merging block request @bio to the end of an existing block request

 * in queue @q.

 */

DEFINE_EVENT(block_bio, block_bio_backmerge,



	TP_PROTO(struct request_queue *q, struct bio *bio),



	TP_ARGS(q, bio)

)



/**

 * block_bio_frontmerge - merging block operation to the beginning of an existing operation

 * @q: queue holding operation

 * @bio: new block operation to merge

 *

 * Merging block IO operation @bio to the beginning of an existing block

 * operation in queue @q.

 */

DEFINE_EVENT(block_bio, block_bio_frontmerge,



	TP_PROTO(struct request_queue *q, struct bio *bio),



	TP_ARGS(q, bio)

)



/**

 * block_bio_queue - putting new block IO operation in queue

 * @q: queue holding operation

 * @bio: new block operation

 *

 * About to place the block IO operation @bio into queue @q.

 */

DEFINE_EVENT(block_bio, block_bio_queue,



	TP_PROTO(struct request_queue *q, struct bio *bio),



	TP_ARGS(q, bio)

)



DECLARE_EVENT_CLASS(block_get_rq,



	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),



	TP_ARGS(q, bio, rw),



	TP_STRUCT__entry(

		__field( dev_t,		dev			)

		__field( sector_t,	sector			)

		__field( unsigned int,	nr_sector		)

		__field( unsigned int,	rwbs			)

		__array_text( char,		comm,	TASK_COMM_LEN	)

        ),



	TP_fast_assign(

		tp_assign(dev, bio ? bio->bi_bdev->bd_dev : 0)

		tp_assign(sector, bio ? bio->bi_sector : 0)

		tp_assign(nr_sector, bio ? bio->bi_size >> 9 : 0)

		blk_fill_rwbs(rwbs, bio ? bio->bi_rw : 0,

			      bio ? bio->bi_size >> 9 : 0)

		tp_memcpy(comm, current->comm, TASK_COMM_LEN)

        ),



	TP_printk("%d,%d %s %llu + %u [%s]",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector, __entry->comm)

)



/**

 * block_getrq - get a free request entry in queue for block IO operations

 * @q: queue for operations

 * @bio: pending block IO operation

 * @rw: low bit indicates a read (%0) or a write (%1)

 *

 * A request struct for queue @q has been allocated to handle the

 * block IO operation @bio.

 */

DEFINE_EVENT(block_get_rq, block_getrq,



	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),



	TP_ARGS(q, bio, rw)

)



/**

 * block_sleeprq - waiting to get a free request entry in queue for block IO operation

 * @q: queue for operation

 * @bio: pending block IO operation

 * @rw: low bit indicates a read (%0) or a write (%1)

 *

 * In the case where a request struct cannot be provided for queue @q

 * the process needs to wait for an request struct to become

 * available.  This tracepoint event is generated each time the

 * process goes to sleep waiting for request struct become available.

 */

DEFINE_EVENT(block_get_rq, block_sleeprq,



	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),



	TP_ARGS(q, bio, rw)

)



/**

 * block_plug - keep operations requests in request queue

 * @q: request queue to plug

 *

 * Plug the request queue @q.  Do not allow block operation requests

 * to be sent to the device driver. Instead, accumulate requests in

 * the queue to improve throughput performance of the block device.

 */

TRACE_EVENT(block_plug,



	TP_PROTO(struct request_queue *q),



	TP_ARGS(q),



	TP_STRUCT__entry(

		__array_text( char,		comm,	TASK_COMM_LEN	)

	),



	TP_fast_assign(

		tp_memcpy(comm, current->comm, TASK_COMM_LEN)

	),



	TP_printk("[%s]", __entry->comm)

)



DECLARE_EVENT_CLASS(block_unplug,



	TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),



	TP_ARGS(q, depth, explicit),



	TP_STRUCT__entry(

		__field( int,		nr_rq			)

		__array_text( char,		comm,	TASK_COMM_LEN	)

	),



	TP_fast_assign(

		tp_assign(nr_rq, depth)

		tp_memcpy(comm, current->comm, TASK_COMM_LEN)

	),



	TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)

)



/**

 * block_unplug - release of operations requests in request queue

 * @q: request queue to unplug

 * @depth: number of requests just added to the queue

 * @explicit: whether this was an explicit unplug, or one from schedule()

 *

 * Unplug request queue @q because device driver is scheduled to work

 * on elements in the request queue.

 */

DEFINE_EVENT(block_unplug, block_unplug,



	TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),



	TP_ARGS(q, depth, explicit)

)



/**

 * block_split - split a single bio struct into two bio structs

 * @q: queue containing the bio

 * @bio: block operation being split

 * @new_sector: The starting sector for the new bio

 *

 * The bio request @bio in request queue @q needs to be split into two

 * bio requests. The newly created @bio request starts at

 * @new_sector. This split may be required due to hardware limitation

 * such as operation crossing device boundaries in a RAID system.

 */

TRACE_EVENT(block_split,



	TP_PROTO(struct request_queue *q, struct bio *bio,

		 unsigned int new_sector),



	TP_ARGS(q, bio, new_sector),



	TP_STRUCT__entry(

		__field( dev_t,		dev				)

		__field( sector_t,	sector				)

		__field( sector_t,	new_sector			)

		__field( unsigned int,	rwbs		)

		__array_text( char,		comm,		TASK_COMM_LEN	)

	),



	TP_fast_assign(

		tp_assign(dev, bio->bi_bdev->bd_dev)

		tp_assign(sector, bio->bi_sector)

		tp_assign(new_sector, new_sector)

		blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)

		tp_memcpy(comm, current->comm, TASK_COMM_LEN)

	),



	TP_printk("%d,%d %s %llu / %llu [%s]",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  (unsigned long long)__entry->sector,

		  (unsigned long long)__entry->new_sector,

		  __entry->comm)

)



/**

 * block_bio_remap - map request for a logical device to the raw device

 * @q: queue holding the operation

 * @bio: revised operation

 * @dev: device for the operation

 * @from: original sector for the operation

 *

 * An operation for a logical device has been mapped to the

 * raw block device.

 */

TRACE_EVENT(block_bio_remap,



	TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,

		 sector_t from),



	TP_ARGS(q, bio, dev, from),



	TP_STRUCT__entry(

		__field( dev_t,		dev		)

		__field( sector_t,	sector		)

		__field( unsigned int,	nr_sector	)

		__field( dev_t,		old_dev		)

		__field( sector_t,	old_sector	)

		__field( unsigned int,	rwbs		)

	),



	TP_fast_assign(

		tp_assign(dev, bio->bi_bdev->bd_dev)

		tp_assign(sector, bio->bi_sector)

		tp_assign(nr_sector, bio->bi_size >> 9)

		tp_assign(old_dev, dev)

		tp_assign(old_sector, from)

		blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)

	),



	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector,

		  MAJOR(__entry->old_dev), MINOR(__entry->old_dev),

		  (unsigned long long)__entry->old_sector)

)



/**

 * block_rq_remap - map request for a block operation request

 * @q: queue holding the operation

 * @rq: block IO operation request

 * @dev: device for the operation

 * @from: original sector for the operation

 *

 * The block operation request @rq in @q has been remapped.  The block

 * operation request @rq holds the current information and @from hold

 * the original sector.

 */

TRACE_EVENT(block_rq_remap,



	TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,

		 sector_t from),



	TP_ARGS(q, rq, dev, from),



	TP_STRUCT__entry(

		__field( dev_t,		dev		)

		__field( sector_t,	sector		)

		__field( unsigned int,	nr_sector	)

		__field( dev_t,		old_dev		)

		__field( sector_t,	old_sector	)

		__field( unsigned int,	rwbs		)

	),



	TP_fast_assign(

		tp_assign(dev, disk_devt(rq->rq_disk))

		tp_assign(sector, blk_rq_pos(rq))

		tp_assign(nr_sector, blk_rq_sectors(rq))

		tp_assign(old_dev, dev)

		tp_assign(old_sector, from)

		blk_fill_rwbs(rwbs, rq->cmd_flags, blk_rq_bytes(rq))

	),



	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  __print_rwbs_flags(__entry->rwbs),

		  (unsigned long long)__entry->sector,

		  __entry->nr_sector,

		  MAJOR(__entry->old_dev), MINOR(__entry->old_dev),

		  (unsigned long long)__entry->old_sector)

)



#undef __print_rwbs_flags

#undef blk_fill_rwbs



#endif /* _TRACE_BLOCK_H */



/* This part must be outside protection */

#include "../../../probes/define_trace.h"

drivers/staging/lttng/instrumentation/events/lttng-module/irq.h

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Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM irq



#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_IRQ_H



#include <linux/tracepoint.h>



#ifndef _TRACE_IRQ_DEF_

#define _TRACE_IRQ_DEF_



struct irqaction;

struct softirq_action;



#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }

#define show_softirq_name(val)				\

	__print_symbolic(val,				\

			 softirq_name(HI),		\

			 softirq_name(TIMER),		\

			 softirq_name(NET_TX),		\

			 softirq_name(NET_RX),		\

			 softirq_name(BLOCK),		\

			 softirq_name(BLOCK_IOPOLL),	\

			 softirq_name(TASKLET),		\

			 softirq_name(SCHED),		\

			 softirq_name(HRTIMER),		\

			 softirq_name(RCU))



#endif /* _TRACE_IRQ_DEF_ */



/**

 * irq_handler_entry - called immediately before the irq action handler

 * @irq: irq number

 * @action: pointer to struct irqaction

 *

 * The struct irqaction pointed to by @action contains various

 * information about the handler, including the device name,

 * @action->name, and the device id, @action->dev_id. When used in

 * conjunction with the irq_handler_exit tracepoint, we can figure

 * out irq handler latencies.

 */

TRACE_EVENT(irq_handler_entry,



	TP_PROTO(int irq, struct irqaction *action),



	TP_ARGS(irq, action),



	TP_STRUCT__entry(

		__field(	int,	irq		)

		__string(	name,	action->name	)

	),



	TP_fast_assign(

		tp_assign(irq, irq)

		tp_strcpy(name, action->name)

	),



	TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))

)



/**

 * irq_handler_exit - called immediately after the irq action handler returns

 * @irq: irq number

 * @action: pointer to struct irqaction

 * @ret: return value

 *

 * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding

 * @action->handler scuccessully handled this irq. Otherwise, the irq might be

 * a shared irq line, or the irq was not handled successfully. Can be used in

 * conjunction with the irq_handler_entry to understand irq handler latencies.

 */

TRACE_EVENT(irq_handler_exit,



	TP_PROTO(int irq, struct irqaction *action, int ret),



	TP_ARGS(irq, action, ret),



	TP_STRUCT__entry(

		__field(	int,	irq	)

		__field(	int,	ret	)

	),



	TP_fast_assign(

		tp_assign(irq, irq)

		tp_assign(ret, ret)

	),



	TP_printk("irq=%d ret=%s",

		  __entry->irq, __entry->ret ? "handled" : "unhandled")

)



DECLARE_EVENT_CLASS(softirq,



	TP_PROTO(unsigned int vec_nr),



	TP_ARGS(vec_nr),



	TP_STRUCT__entry(

		__field(	unsigned int,	vec	)

	),



	TP_fast_assign(

		tp_assign(vec, vec_nr)

	),



	TP_printk("vec=%u [action=%s]", __entry->vec,

		  show_softirq_name(__entry->vec))

)



/**

 * softirq_entry - called immediately before the softirq handler

 * @vec_nr:  softirq vector number

 *

 * When used in combination with the softirq_exit tracepoint

 * we can determine the softirq handler runtine.

 */

DEFINE_EVENT(softirq, softirq_entry,



	TP_PROTO(unsigned int vec_nr),



	TP_ARGS(vec_nr)

)



/**

 * softirq_exit - called immediately after the softirq handler returns

 * @vec_nr:  softirq vector number

 *

 * When used in combination with the softirq_entry tracepoint

 * we can determine the softirq handler runtine.

 */

DEFINE_EVENT(softirq, softirq_exit,



	TP_PROTO(unsigned int vec_nr),



	TP_ARGS(vec_nr)

)



/**

 * softirq_raise - called immediately when a softirq is raised

 * @vec_nr:  softirq vector number

 *

 * When used in combination with the softirq_entry tracepoint

 * we can determine the softirq raise to run latency.

 */

DEFINE_EVENT(softirq, softirq_raise,



	TP_PROTO(unsigned int vec_nr),



	TP_ARGS(vec_nr)

)



#endif /*  _TRACE_IRQ_H */



/* This part must be outside protection */

#include "../../../probes/define_trace.h"

drivers/staging/lttng/instrumentation/events/lttng-module/kvm.h

0 → 100644
+312 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/staging/lttng/instrumentation/events/lttng-module/lttng.h

0 → 100644
+34 −0
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM lttng



#if !defined(_TRACE_LTTNG_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_LTTNG_H



#include <linux/tracepoint.h>



TRACE_EVENT(lttng_metadata,



	TP_PROTO(const char *str),



	TP_ARGS(str),



	/*

	 * Not exactly a string: more a sequence of bytes (dynamic

	 * array) without the length. This is a dummy anyway: we only

	 * use this declaration to generate an event metadata entry.

	 */

	TP_STRUCT__entry(

		__string(	str,		str	)

	),



	TP_fast_assign(

		tp_strcpy(str, str)

	),



	TP_printk("")

)



#endif /*  _TRACE_LTTNG_H */



/* This part must be outside protection */

#include "../../../probes/define_trace.h"