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Commit c56f16da authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: add tracepoint for f2fs_gc 



This patch adds tracepoint for f2fs_gc.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 7f2b4e8e

fs/f2fs/gc.c

+36 −14
Original line number Diff line number Diff line
@@ -919,7 +919,7 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi, 
	struct blk_plug plug;

	unsigned int segno = start_segno;

	unsigned int end_segno = start_segno + sbi->segs_per_sec;

	int sec_freed = 0;

	int seg_freed = 0;

	unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ?

						SUM_TYPE_DATA : SUM_TYPE_NODE;
@@ -965,6 +965,10 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi, 
								gc_type);



		stat_inc_seg_count(sbi, type, gc_type);



		if (gc_type == FG_GC &&

				get_valid_blocks(sbi, segno, false) == 0)

			seg_freed++;

next:

		f2fs_put_page(sum_page, 0);

	}
@@ -975,21 +979,17 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi, 


	blk_finish_plug(&plug);



	if (gc_type == FG_GC &&

		get_valid_blocks(sbi, start_segno, true) == 0)

		sec_freed = 1;



	stat_inc_call_count(sbi->stat_info);



	return sec_freed;

	return seg_freed;

}



int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,

			bool background, unsigned int segno)

{

	int gc_type = sync ? FG_GC : BG_GC;

	int sec_freed = 0;

	int ret;

	int sec_freed = 0, seg_freed = 0, total_freed = 0;

	int ret = 0;

	struct cp_control cpc;

	unsigned int init_segno = segno;

	struct gc_inode_list gc_list = {
@@ -997,6 +997,15 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, 
		.iroot = RADIX_TREE_INIT(GFP_NOFS),

	};



	trace_f2fs_gc_begin(sbi->sb, sync, background,

				get_pages(sbi, F2FS_DIRTY_NODES),

				get_pages(sbi, F2FS_DIRTY_DENTS),

				get_pages(sbi, F2FS_DIRTY_IMETA),

				free_sections(sbi),

				free_segments(sbi),

				reserved_segments(sbi),

				prefree_segments(sbi));



	cpc.reason = __get_cp_reason(sbi);

gc_more:

	if (unlikely(!(sbi->sb->s_flags & MS_ACTIVE))) {
@@ -1023,17 +1032,20 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, 
			gc_type = FG_GC;

	}



	ret = -EINVAL;

	/* f2fs_balance_fs doesn't need to do BG_GC in critical path. */

	if (gc_type == BG_GC && !background)

	if (gc_type == BG_GC && !background) {

		ret = -EINVAL;

		goto stop;

	if (!__get_victim(sbi, &segno, gc_type))

	}

	if (!__get_victim(sbi, &segno, gc_type)) {

		ret = -ENODATA;

		goto stop;

	ret = 0;

	}



	if (do_garbage_collect(sbi, segno, &gc_list, gc_type) &&

			gc_type == FG_GC)

	seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type);

	if (gc_type == FG_GC && seg_freed == sbi->segs_per_sec)

		sec_freed++;

	total_freed += seg_freed;



	if (gc_type == FG_GC)

		sbi->cur_victim_sec = NULL_SEGNO;
@@ -1050,6 +1062,16 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, 
stop:

	SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0;

	SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno;



	trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed,

				get_pages(sbi, F2FS_DIRTY_NODES),

				get_pages(sbi, F2FS_DIRTY_DENTS),

				get_pages(sbi, F2FS_DIRTY_IMETA),

				free_sections(sbi),

				free_segments(sbi),

				reserved_segments(sbi),

				prefree_segments(sbi));



	mutex_unlock(&sbi->gc_mutex);



	put_gc_inode(&gc_list);

include/trace/events/f2fs.h

+107 −0
Original line number Diff line number Diff line
@@ -569,6 +569,113 @@ TRACE_EVENT(f2fs_background_gc, 
		__entry->free)

);



TRACE_EVENT(f2fs_gc_begin,



	TP_PROTO(struct super_block *sb, bool sync, bool background,

			long long dirty_nodes, long long dirty_dents,

			long long dirty_imeta, unsigned int free_sec,

			unsigned int free_seg, int reserved_seg,

			unsigned int prefree_seg),



	TP_ARGS(sb, sync, background, dirty_nodes, dirty_dents, dirty_imeta,

		free_sec, free_seg, reserved_seg, prefree_seg),



	TP_STRUCT__entry(

		__field(dev_t,		dev)

		__field(bool,		sync)

		__field(bool,		background)

		__field(long long,	dirty_nodes)

		__field(long long,	dirty_dents)

		__field(long long,	dirty_imeta)

		__field(unsigned int,	free_sec)

		__field(unsigned int,	free_seg)

		__field(int,		reserved_seg)

		__field(unsigned int,	prefree_seg)

	),



	TP_fast_assign(

		__entry->dev		= sb->s_dev;

		__entry->sync		= sync;

		__entry->background	= background;

		__entry->dirty_nodes	= dirty_nodes;

		__entry->dirty_dents	= dirty_dents;

		__entry->dirty_imeta	= dirty_imeta;

		__entry->free_sec	= free_sec;

		__entry->free_seg	= free_seg;

		__entry->reserved_seg	= reserved_seg;

		__entry->prefree_seg	= prefree_seg;

	),



	TP_printk("dev = (%d,%d), sync = %d, background = %d, nodes = %lld, "

		"dents = %lld, imeta = %lld, free_sec:%u, free_seg:%u, "

		"rsv_seg:%d, prefree_seg:%u",

		show_dev(__entry->dev),

		__entry->sync,

		__entry->background,

		__entry->dirty_nodes,

		__entry->dirty_dents,

		__entry->dirty_imeta,

		__entry->free_sec,

		__entry->free_seg,

		__entry->reserved_seg,

		__entry->prefree_seg)

);



TRACE_EVENT(f2fs_gc_end,



	TP_PROTO(struct super_block *sb, int ret, int seg_freed,

			int sec_freed, long long dirty_nodes,

			long long dirty_dents, long long dirty_imeta,

			unsigned int free_sec, unsigned int free_seg,

			int reserved_seg, unsigned int prefree_seg),



	TP_ARGS(sb, ret, seg_freed, sec_freed, dirty_nodes, dirty_dents,

		dirty_imeta, free_sec, free_seg, reserved_seg, prefree_seg),



	TP_STRUCT__entry(

		__field(dev_t,		dev)

		__field(int,		ret)

		__field(int,		seg_freed)

		__field(int,		sec_freed)

		__field(long long,	dirty_nodes)

		__field(long long,	dirty_dents)

		__field(long long,	dirty_imeta)

		__field(unsigned int,	free_sec)

		__field(unsigned int,	free_seg)

		__field(int,		reserved_seg)

		__field(unsigned int,	prefree_seg)

	),



	TP_fast_assign(

		__entry->dev		= sb->s_dev;

		__entry->ret		= ret;

		__entry->seg_freed	= seg_freed;

		__entry->sec_freed	= sec_freed;

		__entry->dirty_nodes	= dirty_nodes;

		__entry->dirty_dents	= dirty_dents;

		__entry->dirty_imeta	= dirty_imeta;

		__entry->free_sec	= free_sec;

		__entry->free_seg	= free_seg;

		__entry->reserved_seg	= reserved_seg;

		__entry->prefree_seg	= prefree_seg;

	),



	TP_printk("dev = (%d,%d), ret = %d, seg_freed = %d, sec_freed = %d, "

		"nodes = %lld, dents = %lld, imeta = %lld, free_sec:%u, "

		"free_seg:%u, rsv_seg:%d, prefree_seg:%u",

		show_dev(__entry->dev),

		__entry->ret,

		__entry->seg_freed,

		__entry->sec_freed,

		__entry->dirty_nodes,

		__entry->dirty_dents,

		__entry->dirty_imeta,

		__entry->free_sec,

		__entry->free_seg,

		__entry->reserved_seg,

		__entry->prefree_seg)

);



TRACE_EVENT(f2fs_get_victim,



	TP_PROTO(struct super_block *sb, int type, int gc_type,