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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>
This commit is contained in:
Jaegeuk Kim 2015-10-05 11:32:34 -07:00
parent 6aefd93b01
commit 5c26743474
2 changed files with 31 additions and 0 deletions
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3
fs/f2fs/gc.c
View File

@ -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;

28
include/trace/events/f2fs.h
View File

@ -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,