From 8e46b3ed11b750a740fec0a313ad9118059fc37b Mon Sep 17 00:00:00 2001
From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Date: Tue, 23 Apr 2013 16:42:53 +0900
Subject: [PATCH 4/7] f2fs: add tracepoints for GC threads
Cc: linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx,
linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx
Add tracepoints for tracing the garbage collector
threads in f2fs with status of collection & type.
Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Pankaj Kumar <pankaj.km@xxxxxxxxxxx>
Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
[Jaegeuk: modify slightly to show information]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx>
---
fs/f2fs/gc.c | 5 +++
include/trace/events/f2fs.h | 75
+++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 80 insertions(+)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 37b05e1..1ca3324 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -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 @@ got_it:
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);
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 924e69a..6f7cf7a 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -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 */
--
1.8.1.3.566.gaa39828
--
Jaegeuk Kim
Samsung
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