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bcache: print number of keys in trace_bcache_journal_write 

Sometimes flush journal may be very frequent, so it's useful to dump
number of keys every time write journal.

Signed-off-by: Guoju Fang <fangguoju@gmail.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
Guoju Fang 2018-12-13 22:53:57 +08:00 committed by Jens Axboe
parent cc38ca7ed5
commit e78bd0d26f
2 changed files with 25 additions and 4 deletions
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2
drivers/md/bcache/journal.c
View File

@ -663,7 +663,7 @@ static void journal_write_unlocked(struct closure *cl)
REQ_SYNC|REQ_META|REQ_PREFLUSH|REQ_FUA);
bch_bio_map(bio, w->data);
trace_bcache_journal_write(bio);
trace_bcache_journal_write(bio, w->data->keys);
bio_list_add(&list, bio);
SET_PTR_OFFSET(k, i, PTR_OFFSET(k, i) + sectors);

27
include/trace/events/bcache.h
View File

@ -221,9 +221,30 @@ DEFINE_EVENT(cache_set, bcache_journal_entry_full,
TP_ARGS(c)
);
DEFINE_EVENT(bcache_bio, bcache_journal_write,
TP_PROTO(struct bio *bio),
TP_ARGS(bio)
TRACE_EVENT(bcache_journal_write,
TP_PROTO(struct bio *bio, u32 keys),
TP_ARGS(bio, keys),
TP_STRUCT__entry(
__field(dev_t, dev )
__field(sector_t, sector )
__field(unsigned int, nr_sector )
__array(char, rwbs, 6 )
__field(u32, nr_keys )
),
TP_fast_assign(
__entry->dev = bio_dev(bio);
__entry->sector = bio->bi_iter.bi_sector;
__entry->nr_sector = bio->bi_iter.bi_size >> 9;
__entry->nr_keys = keys;
blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
),
TP_printk("%d,%d %s %llu + %u keys %u",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
(unsigned long long)__entry->sector, __entry->nr_sector,
__entry->nr_keys)
);
/* Btree */