Commit 5c267434 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: add a tracepoint for background gc 



This patch introduces a tracepoint to monitor background gc behaviors.

Reviewed-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 6aefd93b

fs/f2fs/gc.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

include/trace/events/f2fs.h

+28 −0
Original line number Diff line number Diff line
@@ -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,