kobayashi.kk at ncos
Jun 5, 2008, 4:32 PM
Views: 189
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[PATCH 2/3 v2] per-task-delay-accounting: update taskstats for memory reclaim delay
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Add members for memory reclaim delay to taskstats,
and accumulate them in __delayacct_add_tsk() .
Signed-off-by: Keika Kobayashi <kobayashi.kk[at]ncos.nec.co.jp>
---
include/linux/taskstats.h | 4 ++++
kernel/delayacct.c | 3 +++
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/include/linux/taskstats.h b/include/linux/taskstats.h
index 5d69c07..87aae21 100644
--- a/include/linux/taskstats.h
+++ b/include/linux/taskstats.h
@@ -81,6 +81,10 @@ struct taskstats {
__u64 swapin_count;
__u64 swapin_delay_total;
+ /* Delay waiting for memory reclaim */
+ __u64 freepages_count;
+ __u64 freepages_delay_total;
+
/* cpu "wall-clock" running time
* On some architectures, value will adjust for cpu time stolen
* from the kernel in involuntary waits due to virtualization.
diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index 84b6782..b3179da 100644
--- a/kernel/delayacct.c
+++ b/kernel/delayacct.c
@@ -145,8 +145,11 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk)
d->blkio_delay_total = (tmp < d->blkio_delay_total) ? 0 : tmp;
tmp = d->swapin_delay_total + tsk->delays->swapin_delay;
d->swapin_delay_total = (tmp < d->swapin_delay_total) ? 0 : tmp;
+ tmp = d->freepages_delay_total + tsk->delays->freepages_delay;
+ d->freepages_delay_total = (tmp < d->freepages_delay_total) ? 0 : tmp;
d->blkio_count += tsk->delays->blkio_count;
d->swapin_count += tsk->delays->swapin_count;
+ d->freepages_count += tsk->delays->freepages_count;
spin_unlock_irqrestore(&tsk->delays->lock, flags);
done:
--
1.5.0.6
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[PATCH 2/3 v2] per-task-delay-accounting: update taskstats for memory reclaim delay
