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[PATCH] per-task-delay-accounting: delay accounting usage of taskstats interface

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Usage of taskstats interface by delay accounting.

Signed-off-by: Shailabh Nagar <nagar@us.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>
This commit is contained in:
Shailabh Nagar 2006-07-14 00:24:41 -07:00 • committed by Linus Torvalds
parent c757249af1
commit 6f44993fe1
7 changed files with 144 additions and 7 deletions
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15
include/linux/delayacct.h
View file

@ -18,6 +18,7 @@
#define _LINUX_DELAYACCT_H
#include <linux/sched.h>
#include <linux/taskstats_kern.h>
/*
* Per-task flags relevant to delay accounting
@ -35,6 +36,7 @@ extern void __delayacct_tsk_init(struct task_struct *);
extern void __delayacct_tsk_exit(struct task_struct *);
extern void __delayacct_blkio_start(void);
extern void __delayacct_blkio_end(void);
extern int __delayacct_add_tsk(struct taskstats *, struct task_struct *);
static inline void delayacct_set_flag(int flag)
{
@ -74,6 +76,16 @@ static inline void delayacct_blkio_end(void)
__delayacct_blkio_end();
}
static inline int delayacct_add_tsk(struct taskstats *d,
struct task_struct *tsk)
{
if (likely(!delayacct_on))
return -EINVAL;
if (!tsk->delays)
return 0;
return __delayacct_add_tsk(d, tsk);
}
#else
static inline void delayacct_set_flag(int flag)
{}
@ -89,6 +101,9 @@ static inline void delayacct_blkio_start(void)
{}
static inline void delayacct_blkio_end(void)
{}
static inline int delayacct_add_tsk(struct taskstats *d,
struct task_struct *tsk)
{ return 0; }
#endif /* CONFIG_TASK_DELAY_ACCT */
#endif