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Subject[RESEND PATCH v1 2/2] trace: events: block: Add tag in block trace events
Date
Print the request tag along with other information in block trace events
when tracing request , and unplug type (Sync / Async).

Signed-off-by: Bean Huo <beanhuo@micron.com>
---
include/trace/events/block.h | 36 +++++++++++++++++++++++++-----------
1 file changed, 25 insertions(+), 11 deletions(-)

diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index 81b43f5..f8c0b9e 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -81,6 +81,7 @@ TRACE_EVENT(block_rq_requeue,
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
+ __field( int, tag )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@@ -89,16 +90,17 @@ TRACE_EVENT(block_rq_requeue,
__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
__entry->sector = blk_rq_trace_sector(rq);
__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
+ __entry->tag = rq->tag;

blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
__get_str(cmd)[0] = '\0';
),

- TP_printk("%d,%d %s (%s) %llu + %u [%d]",
+ TP_printk("%d,%d %s (%s) %llu + %u tag=%d [%d]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
- __entry->nr_sector, 0)
+ __entry->nr_sector, __entry->tag, 0)
);

/**
@@ -124,6 +126,7 @@ TRACE_EVENT(block_rq_complete,
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__field( int, error )
+ __field( int, tag )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@@ -133,16 +136,17 @@ TRACE_EVENT(block_rq_complete,
__entry->sector = blk_rq_pos(rq);
__entry->nr_sector = nr_bytes >> 9;
__entry->error = error;
+ __entry->tag = rq->tag;

blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, nr_bytes);
__get_str(cmd)[0] = '\0';
),

- TP_printk("%d,%d %s (%s) %llu + %u [%d]",
+ TP_printk("%d,%d %s (%s) %llu + %u tag=%d [%d]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
- __entry->nr_sector, __entry->error)
+ __entry->nr_sector, __entry->tag, __entry->error)
);

DECLARE_EVENT_CLASS(block_rq,
@@ -156,6 +160,7 @@ DECLARE_EVENT_CLASS(block_rq,
__field( sector_t, sector )
__field( unsigned int, nr_sector )
__field( unsigned int, bytes )
+ __field( int, tag )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
__dynamic_array( char, cmd, 1 )
@@ -166,17 +171,18 @@ 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->tag = rq->tag;

blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
__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 tag=%d [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __entry->bytes, __get_str(cmd),
(unsigned long long)__entry->sector,
- __entry->nr_sector, __entry->comm)
+ __entry->nr_sector, __entry->tag, __entry->comm)
);

/**
@@ -297,6 +303,7 @@ DECLARE_EVENT_CLASS(block_bio_merge,
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
+ __field( int, tag )
__array( char, rwbs, RWBS_LEN )
__array( char, comm, TASK_COMM_LEN )
),
@@ -305,14 +312,15 @@ DECLARE_EVENT_CLASS(block_bio_merge,
__entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio_sectors(bio);
+ __entry->tag = rq->tag;
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),

- TP_printk("%d,%d %s %llu + %u [%s]",
+ TP_printk("%d,%d %s %llu + %u tag=%d [%s]",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector,
- __entry->nr_sector, __entry->comm)
+ __entry->nr_sector, __entry->tag, __entry->comm)
);

/**
@@ -478,15 +486,18 @@ DECLARE_EVENT_CLASS(block_unplug,

TP_STRUCT__entry(
__field( int, nr_rq )
+ __field( bool, explicit )
__array( char, comm, TASK_COMM_LEN )
),

TP_fast_assign(
__entry->nr_rq = depth;
+ __entry->explicit = explicit;
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),

- TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
+ TP_printk("[%s] %d %s", __entry->comm, __entry->nr_rq,
+ __entry->explicit ? "Sync" : "Async")
);

/**
@@ -611,6 +622,7 @@ TRACE_EVENT(block_rq_remap,
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
+ __field( int, tag )
__field( dev_t, old_dev )
__field( sector_t, old_sector )
__field( unsigned int, nr_bios )
@@ -621,18 +633,20 @@ TRACE_EVENT(block_rq_remap,
__entry->dev = disk_devt(rq->rq_disk);
__entry->sector = blk_rq_pos(rq);
__entry->nr_sector = blk_rq_sectors(rq);
+ __entry->tag = rq->tag;
__entry->old_dev = dev;
__entry->old_sector = from;
__entry->nr_bios = blk_rq_count_bios(rq);
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
),

- TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u",
+ TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u, tag=%d",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector,
__entry->nr_sector,
MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
- (unsigned long long)__entry->old_sector, __entry->nr_bios)
+ (unsigned long long)__entry->old_sector, __entry->nr_bios,
+ __entry->tag)
);

#endif /* _TRACE_BLOCK_H */
--
2.7.4
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