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authorShailabh Nagar <nagar@watson.ibm.com>2006-07-14 00:24:43 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-14 21:53:57 -0700
commit25890454667b3295f67b3372352be90705f8667c (patch)
treef66e24be59ced75853eb82709e3036e735aac21e /kernel/delayacct.c
parenta3baf649ca9ca0a96fba538f03b0f17c043b755c (diff)
downloadlinux-2.6.34-ux500-25890454667b3295f67b3372352be90705f8667c.tar.gz
[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.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index 1be274a462c..f05392d6426 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;
+}
+