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nilfs2: add tracepoints for analyzing reading and writing metadata files 

This patch adds tracepoints for analyzing requests of reading and writing
metadata files.  The tracepoints cover every in-place mdt files (cpfile,
sufile, and datfile).

Example of tracing mdt_insert_new_block():
              cp-14635 [000] ...1 30598.199309: nilfs2_mdt_insert_new_block: inode = ffff88022a8d0178 ino = 3 block = 155
              cp-14635 [000] ...1 30598.199520: nilfs2_mdt_insert_new_block: inode = ffff88022a8d0178 ino = 3 block = 5
              cp-14635 [000] ...1 30598.200828: nilfs2_mdt_insert_new_block: inode = ffff88022a8d0178 ino = 3 block = 253

Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: TK Kato <TK.Kato@wdc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hitoshi Mitake 2015-11-06 16:32:08 -08:00 committed by Linus Torvalds
parent 83eec5e6dd
commit a9cd207c23
2 changed files with 60 additions and 0 deletions
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6
fs/nilfs2/mdt.c
View File

@ -33,6 +33,7 @@
#include "page.h"
#include "mdt.h"
#include <trace/events/nilfs2.h>
#define NILFS_MDT_MAX_RA_BLOCKS (16 - 1)
@ -68,6 +69,9 @@ nilfs_mdt_insert_new_block(struct inode *inode, unsigned long block,
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
nilfs_mdt_mark_dirty(inode);
trace_nilfs2_mdt_insert_new_block(inode, inode->i_ino, block);
return 0;
}
@ -158,6 +162,8 @@ nilfs_mdt_submit_block(struct inode *inode, unsigned long blkoff,
get_bh(bh);
submit_bh(mode, bh);
ret = 0;
trace_nilfs2_mdt_submit_block(inode, inode->i_ino, blkoff, mode);
out:
get_bh(bh);
*out_bh = bh;

54
include/trace/events/nilfs2.h
View File

@ -162,6 +162,60 @@ TRACE_EVENT(nilfs2_segment_usage_freed,
__entry->segnum)
);
TRACE_EVENT(nilfs2_mdt_insert_new_block,
TP_PROTO(struct inode *inode,
unsigned long ino,
unsigned long block),
TP_ARGS(inode, ino, block),
TP_STRUCT__entry(
__field(struct inode *, inode)
__field(unsigned long, ino)
__field(unsigned long, block)
),
TP_fast_assign(
__entry->inode = inode;
__entry->ino = ino;
__entry->block = block;
),
TP_printk("inode = %p ino = %lu block = %lu",
__entry->inode,
__entry->ino,
__entry->block)
);
TRACE_EVENT(nilfs2_mdt_submit_block,
TP_PROTO(struct inode *inode,
unsigned long ino,
unsigned long blkoff,
int mode),
TP_ARGS(inode, ino, blkoff, mode),
TP_STRUCT__entry(
__field(struct inode *, inode)
__field(unsigned long, ino)
__field(unsigned long, blkoff)
__field(int, mode)
),
TP_fast_assign(
__entry->inode = inode;
__entry->ino = ino;
__entry->blkoff = blkoff;
__entry->mode = mode;
),
TP_printk("inode = %p ino = %lu blkoff = %lu mode = %x",
__entry->inode,
__entry->ino,
__entry->blkoff,
__entry->mode)
);
#endif /* _TRACE_NILFS2_H */
/* This part must be outside protection */