Commit 8e46b3ed authored by Namjae Jeon's avatar Namjae Jeon Committed by Jaegeuk Kim
Browse files

f2fs: add tracepoints for GC threads 



Add tracepoints for tracing the garbage collector
threads in f2fs with status of collection & type.

Signed-off-by: default avatarNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: default avatarPankaj Kumar <pankaj.km@samsung.com>
Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
[Jaegeuk: modify slightly to show information]
Signed-off-by: default avatarJaegeuk Kim <jaegeuk.kim@samsung.com>
parent 848753aa

fs/f2fs/gc.c

+5 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include "node.h"

#include "segment.h"

#include "gc.h"

#include <trace/events/f2fs.h>



static struct kmem_cache *winode_slab;
@@ -301,6 +302,10 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi, 
				set_bit(secno, dirty_i->victim_secmap);

		}

		*result = (p.min_segno / p.ofs_unit) * p.ofs_unit;



		trace_f2fs_get_victim(sbi->sb, type, gc_type, &p,

				sbi->cur_victim_sec,

				prefree_segments(sbi), free_segments(sbi));

	}

	mutex_unlock(&dirty_i->seglist_lock);

include/trace/events/f2fs.h

+75 −0
Original line number Diff line number Diff line
@@ -18,6 +18,33 @@ 
		{ WRITE_FLUSH,	"WRITE_FLUSH" },			\

		{ WRITE_FUA, 	"WRITE_FUA" })



#define show_data_type(type)						\

	__print_symbolic(type,						\

		{ CURSEG_HOT_DATA, 	"Hot DATA" },			\

		{ CURSEG_WARM_DATA, 	"Warm DATA" },			\

		{ CURSEG_COLD_DATA, 	"Cold DATA" },			\

		{ CURSEG_HOT_NODE, 	"Hot NODE" },			\

		{ CURSEG_WARM_NODE, 	"Warm NODE" },			\

		{ CURSEG_COLD_NODE, 	"Cold NODE" },			\

		{ NO_CHECK_TYPE, 	"No TYPE" })



#define show_gc_type(type)						\

	__print_symbolic(type,						\

		{ FG_GC,	"Foreground GC" },			\

		{ BG_GC,	"Background GC" })



#define show_alloc_mode(type)						\

	__print_symbolic(type,						\

		{ LFS,	"LFS-mode" },					\

		{ SSR,	"SSR-mode" })



#define show_victim_policy(type)					\

	__print_symbolic(type,						\

		{ GC_GREEDY,	"Greedy" },				\

		{ GC_CB,	"Cost-Benefit" })



struct victim_sel_policy;



DECLARE_EVENT_CLASS(f2fs__inode,



	TP_PROTO(struct inode *inode),
@@ -439,6 +466,54 @@ TRACE_EVENT(f2fs_get_data_block, 
		__entry->ret)

);



TRACE_EVENT(f2fs_get_victim,



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

			struct victim_sel_policy *p, unsigned int pre_victim,

			unsigned int prefree, unsigned int free),



	TP_ARGS(sb, type, gc_type, p, pre_victim, prefree, free),



	TP_STRUCT__entry(

		__field(dev_t,	dev)

		__field(int,	type)

		__field(int,	gc_type)

		__field(int,	alloc_mode)

		__field(int,	gc_mode)

		__field(unsigned int,	victim)

		__field(unsigned int,	ofs_unit)

		__field(unsigned int,	pre_victim)

		__field(unsigned int,	prefree)

		__field(unsigned int,	free)

	),



	TP_fast_assign(

		__entry->dev		= sb->s_dev;

		__entry->type		= type;

		__entry->gc_type	= gc_type;

		__entry->alloc_mode	= p->alloc_mode;

		__entry->gc_mode	= p->gc_mode;

		__entry->victim		= p->min_segno;

		__entry->ofs_unit	= p->ofs_unit;

		__entry->pre_victim	= pre_victim;

		__entry->prefree	= prefree;

		__entry->free		= free;

	),



	TP_printk("dev = (%d,%d), type = %s, policy = (%s, %s, %s), victim = %u "

		"ofs_unit = %u, pre_victim_secno = %d, prefree = %u, free = %u",

		show_dev(__entry),

		show_data_type(__entry->type),

		show_gc_type(__entry->gc_type),

		show_alloc_mode(__entry->alloc_mode),

		show_victim_policy(__entry->gc_mode),

		__entry->victim,

		__entry->ofs_unit,

		(int)__entry->pre_victim,

		__entry->prefree,

		__entry->free)

);



#endif /* _TRACE_F2FS_H */



 /* This part must be outside protection */