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Commit a9cd207c authored by Hitoshi Mitake's avatar Hitoshi Mitake Committed by Linus Torvalds
Browse files

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: default avatarHitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: default avatarRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: TK Kato <TK.Kato@wdc.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 83eec5e6

fs/nilfs2/mdt.c

+6 −0
Original line number Diff line number Diff line
@@ -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;

include/trace/events/nilfs2.h

+54 −0
Original line number Diff line number Diff line
@@ -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 */