diff options
| author | Shailabh Nagar <nagar@watson.ibm.com> | 2006-07-14 00:24:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-14 21:53:57 -0700 |
| commit | 25890454667b3295f67b3372352be90705f8667c (patch) | |
| tree | f66e24be59ced75853eb82709e3036e735aac21e /kernel/delayacct.c | |
| parent | a3baf649ca9ca0a96fba538f03b0f17c043b755c (diff) | |
| download | lwn-25890454667b3295f67b3372352be90705f8667c.tar.gz lwn-25890454667b3295f67b3372352be90705f8667c.zip | |
[PATCH] per-task-delay-accounting: /proc export of aggregated block I/O delays
Export I/O delays seen by a task through /proc/<tgid>/stats for use in top
etc.
Note that delays for I/O done for swapping in pages (swapin I/O) is clubbed
together with all other I/O here (this is not the case in the netlink
interface where the swapin I/O is kept distinct)
[akpm@osdl.org: printk warning fix]
Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com>
Signed-off-by: Balbir Singh <balbir@in.ibm.com>
Cc: Jes Sorensen <jes@sgi.com>
Cc: Peter Chubb <peterc@gelato.unsw.edu.au>
Cc: Erich Focht <efocht@ess.nec.de>
Cc: Levent Serinol <lserinol@gmail.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/delayacct.c')
| -rw-r--r-- | kernel/delayacct.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/delayacct.c b/kernel/delayacct.c index 1be274a462ca..f05392d64267 100644 --- a/kernel/delayacct.c +++ b/kernel/delayacct.c @@ -164,3 +164,15 @@ done: spin_unlock(&tsk->delays_lock); return 0; } + +__u64 __delayacct_blkio_ticks(struct task_struct *tsk) +{ + __u64 ret; + + spin_lock(&tsk->delays->lock); + ret = nsec_to_clock_t(tsk->delays->blkio_delay + + tsk->delays->swapin_delay); + spin_unlock(&tsk->delays->lock); + return ret; +} + |