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block: Add ioprio to block_rq tracepoint

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Sometimes we need to track the processing order of requests with
ioprio set. So the ioprio of request can be useful information.

Example：

block_rq_insert: 8,0 RA 16384 () 6500840 + 32 be,0,6 [binder:815_3]
block_rq_issue: 8,0 RA 16384 () 6500840 + 32 be,0,6 [binder:815_3]
block_rq_complete: 8,0 RA () 6500840 + 32 be,0,6 [0]

Signed-off-by: Dongliang Cui <dongliang.cui@unisoc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240614074936.113659-1-dongliang.cui@unisoc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dongliang Cui 2024-06-14 15:49:36 +08:00 committed by Jens Axboe
parent d19b46340b
commit aa6ff4eb7c
1 changed files with 32 additions and 9 deletions
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41
include/trace/events/block.h
View File

@ -9,9 +9,17 @@
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
#include <linux/tracepoint.h>
#include <uapi/linux/ioprio.h>
#define RWBS_LEN 8
#define IOPRIO_CLASS_STRINGS \
{ IOPRIO_CLASS_NONE, "none" }, \
{ IOPRIO_CLASS_RT, "rt" }, \
{ IOPRIO_CLASS_BE, "be" }, \
{ IOPRIO_CLASS_IDLE, "idle" }, \
{ IOPRIO_CLASS_INVALID, "invalid"}
#ifdef CONFIG_BUFFER_HEAD
DECLARE_EVENT_CLASS(block_buffer,
@ -82,6 +90,7 @@ TRACE_EVENT(block_rq_requeue,
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__field( unsigned short, ioprio )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@ -90,16 +99,20 @@ TRACE_EVENT(block_rq_requeue,
__entry->dev = rq->q->disk ? disk_devt(rq->q->disk) : 0;
__entry->sector = blk_rq_trace_sector(rq);
__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
__entry->ioprio = rq->ioprio;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
__get_str(cmd)[0] = '\0';
),
TP_printk("%d,%d %s (%s) %llu + %u [%d]",
TP_printk("%d,%d %s (%s) %llu + %u %s,%u,%u [%d]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
__entry->nr_sector, 0)
(unsigned long long)__entry->sector, __entry->nr_sector,
__print_symbolic(IOPRIO_PRIO_CLASS(__entry->ioprio),
IOPRIO_CLASS_STRINGS),
IOPRIO_PRIO_HINT(__entry->ioprio),
IOPRIO_PRIO_LEVEL(__entry->ioprio), 0)
);
DECLARE_EVENT_CLASS(block_rq_completion,
@ -113,6 +126,7 @@ DECLARE_EVENT_CLASS(block_rq_completion,
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__field( int , error )
__field( unsigned short, ioprio )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@ -122,16 +136,20 @@ DECLARE_EVENT_CLASS(block_rq_completion,
__entry->sector = blk_rq_pos(rq);
__entry->nr_sector = nr_bytes >> 9;
__entry->error = blk_status_to_errno(error);
__entry->ioprio = rq->ioprio;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
__get_str(cmd)[0] = '\0';
),
TP_printk("%d,%d %s (%s) %llu + %u [%d]",
TP_printk("%d,%d %s (%s) %llu + %u %s,%u,%u [%d]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->error)
(unsigned long long)__entry->sector, __entry->nr_sector,
__print_symbolic(IOPRIO_PRIO_CLASS(__entry->ioprio),
IOPRIO_CLASS_STRINGS),
IOPRIO_PRIO_HINT(__entry->ioprio),
IOPRIO_PRIO_LEVEL(__entry->ioprio), __entry->error)
);
/**
@ -180,6 +198,7 @@ DECLARE_EVENT_CLASS(block_rq,
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__field( unsigned int, bytes )
__field( unsigned short, ioprio )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
__dynamic_array( char, cmd, 1 )
@ -190,17 +209,21 @@ DECLARE_EVENT_CLASS(block_rq,
__entry->sector = blk_rq_trace_sector(rq);
__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
__entry->bytes = blk_rq_bytes(rq);
__entry->ioprio = rq->ioprio;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
__get_str(cmd)[0] = '\0';
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
TP_printk("%d,%d %s %u (%s) %llu + %u %s,%u,%u [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __entry->bytes, __get_str(cmd),
(unsigned long long)__entry->sector,
__entry->nr_sector, __entry->comm)
(unsigned long long)__entry->sector, __entry->nr_sector,
__print_symbolic(IOPRIO_PRIO_CLASS(__entry->ioprio),
IOPRIO_CLASS_STRINGS),
IOPRIO_PRIO_HINT(__entry->ioprio),
IOPRIO_PRIO_LEVEL(__entry->ioprio), __entry->comm)
);
/**