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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-10-05 18:32:34 (GMT) |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-10-09 23:20:57 (GMT) |
| commit | 5c2674347466d5c2d5169214e95f4ad6dc09e9b6 (patch) | |
| tree | d717afd7e8668ee46f3d887c25a447130f920ae6 | |
| parent | 6aefd93b01379bf0b62f8b38dcf7a21397893833 (diff) | |
| download | linux-5c2674347466d5c2d5169214e95f4ad6dc09e9b6.tar.xz | |
f2fs: add a tracepoint for background gc
This patch introduces a tracepoint to monitor background gc behaviors.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/gc.c | 3 | ||||
| -rw-r--r-- | include/trace/events/f2fs.h | 28 |
2 files changed, 31 insertions, 0 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index e627c19..e7cec86 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -77,6 +77,9 @@ static int gc_thread_func(void *data) stat_inc_bggc_count(sbi); + trace_f2fs_background_gc(sbi->sb, wait_ms, + prefree_segments(sbi), free_segments(sbi)); + /* if return value is not zero, no victim was selected */ if (f2fs_gc(sbi, test_opt(sbi, FORCE_FG_GC))) wait_ms = gc_th->no_gc_sleep_time; diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index 6aa63d9..7de751d 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -514,6 +514,34 @@ TRACE_EVENT(f2fs_map_blocks, __entry->ret) ); +TRACE_EVENT(f2fs_background_gc, + + TP_PROTO(struct super_block *sb, long wait_ms, + unsigned int prefree, unsigned int free), + + TP_ARGS(sb, wait_ms, prefree, free), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(long, wait_ms) + __field(unsigned int, prefree) + __field(unsigned int, free) + ), + + TP_fast_assign( + __entry->dev = sb->s_dev; + __entry->wait_ms = wait_ms; + __entry->prefree = prefree; + __entry->free = free; + ), + + TP_printk("dev = (%d,%d), wait_ms = %ld, prefree = %u, free = %u", + show_dev(__entry), + __entry->wait_ms, + __entry->prefree, + __entry->free) +); + TRACE_EVENT(f2fs_get_victim, TP_PROTO(struct super_block *sb, int type, int gc_type, |