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[PATCH] per-task-delay-accounting: cpu delay collection via schedstats

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Make the task-related schedstats functions callable by delay accounting even
if schedstats collection isn't turned on.  This removes the dependency of
delay accounting on schedstats.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
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>
This commit is contained in:
Chandra Seetharaman 2006-07-14 00:24:38 -07:00 • committed by Linus Torvalds
parent 0ff922452d
commit 52f17b6c2b
2 changed files with 66 additions and 25 deletions
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20
include/linux/sched.h
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@ -537,7 +537,7 @@ extern struct user_struct root_user;
struct backing_dev_info;
struct reclaim_state;
#ifdef CONFIG_SCHEDSTATS
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
struct sched_info {
/* cumulative counters */
unsigned long cpu_time, /* time spent on the cpu */
@ -548,9 +548,11 @@ struct sched_info {
unsigned long last_arrival, /* when we last ran on a cpu */
last_queued; /* when we were last queued to run */
};
#endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */
#ifdef CONFIG_SCHEDSTATS
extern struct file_operations proc_schedstat_operations;
#endif
#endif /* CONFIG_SCHEDSTATS */
#ifdef CONFIG_TASK_DELAY_ACCT
struct task_delay_info {
@ -580,7 +582,19 @@ struct task_delay_info {
u32 swapin_count; /* total count of the number of swapin block */
/* io operations performed */
};
#endif /* CONFIG_TASK_DELAY_ACCT */
static inline int sched_info_on(void)
{
#ifdef CONFIG_SCHEDSTATS
return 1;
#elif defined(CONFIG_TASK_DELAY_ACCT)
extern int delayacct_on;
return delayacct_on;
#else
return 0;
#endif
}
enum idle_type
{
@ -777,7 +791,7 @@ struct task_struct {
cpumask_t cpus_allowed;
unsigned int time_slice, first_time_slice;
#ifdef CONFIG_SCHEDSTATS
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
struct sched_info sched_info;
#endif