On Sun, 4 Oct 2015 01:02:42 +0900, Mitake Hitoshi wrote:
> 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
>
> Cc: TK Kato <tk.k...@wdc.com>
> Signed-off-by: Hitoshi Mitake <mitake.hito...@lab.ntt.co.jp>
Applied to the tracepoints branch. Thanks.
Ryusuke Konishi
> ---
> fs/nilfs2/mdt.c | 6 +++++
> include/trace/events/nilfs2.h | 54
> +++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 60 insertions(+)
>
> diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
> index dee34d9..1125f40 100644
> --- a/fs/nilfs2/mdt.c
> +++ b/fs/nilfs2/mdt.c
> @@ -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;
> diff --git a/include/trace/events/nilfs2.h b/include/trace/events/nilfs2.h
> index 1b65ba6..c780581 100644
> --- a/include/trace/events/nilfs2.h
> +++ b/include/trace/events/nilfs2.h
> @@ -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 */
> --
> 1.9.1
>
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