Add tracepoints to zone write plugging plug and unplug events.
Examples for these events are:
kworker/u10:4-393 [001] d..1. 282.991660: disk_zone_wplug_add_bio: 8,0 zone 16, BIO 8388608 + 128
kworker/0:1H-58 [ [000] d..1. 283.083294: blk_zone_wplug_bio: 8,0 zone 15, BIO 7864320 + 128
Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
---
block/blk-zoned.c | 5 ++++
include/trace/events/block.h | 44 ++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 48f75f58d05e..5c409c118135 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -822,6 +822,8 @@ static inline void disk_zone_wplug_add_bio(struct gendisk *disk,
* at the tail of the list to preserve the sequential write order.
*/
bio_list_add(&zwplug->bio_list, bio);
+ trace_disk_zone_wplug_add_bio(zwplug->disk->queue, zwplug->zone_no,
+ bio->bi_iter.bi_sector, bio_sectors(bio));
zwplug->flags |= BLK_ZONE_WPLUG_PLUGGED;
@@ -1317,6 +1319,9 @@ static void blk_zone_wplug_bio_work(struct work_struct *work)
goto put_zwplug;
}
+ trace_blk_zone_wplug_bio(zwplug->disk->queue, zwplug->zone_no,
+ bio->bi_iter.bi_sector, bio_sectors(bio));
+
if (!blk_zone_wplug_prepare_bio(zwplug, bio)) {
blk_zone_wplug_bio_io_error(zwplug, bio);
goto again;
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index ff7698efdfde..3e582d5e3a57 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -633,6 +633,50 @@ TRACE_EVENT(blkdev_zone_mgmt,
(unsigned long long)__entry->sector,
__entry->nr_sectors)
);
+
+DECLARE_EVENT_CLASS(block_zwplug,
+
+ TP_PROTO(struct request_queue *q, unsigned int zno, sector_t sector,
+ unsigned int nr_sectors),
+
+ TP_ARGS(q, zno, sector, nr_sectors),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( unsigned int, zno )
+ __field( sector_t, sector )
+ __field( unsigned int, nr_sectors )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = disk_devt(q->disk);
+ __entry->zno = zno;
+ __entry->sector = sector;
+ __entry->nr_sectors = nr_sectors;
+ ),
+
+ TP_printk("%d,%d zone %u, BIO %llu + %u",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->zno,
+ (unsigned long long)__entry->sector,
+ __entry->nr_sectors)
+);
+
+DEFINE_EVENT(block_zwplug, disk_zone_wplug_add_bio,
+
+ TP_PROTO(struct request_queue *q, unsigned int zno, sector_t sector,
+ unsigned int nr_sectors),
+
+ TP_ARGS(q, zno, sector, nr_sectors)
+);
+
+DEFINE_EVENT(block_zwplug, blk_zone_wplug_bio,
+
+ TP_PROTO(struct request_queue *q, unsigned int zno, sector_t sector,
+ unsigned int nr_sectors),
+
+ TP_ARGS(q, zno, sector, nr_sectors)
+);
+
#endif /* _TRACE_BLOCK_H */
/* This part must be outside protection */
--
2.50.0
