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[PATCH] sched: remove lb_stopbalance counter

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Remove scheduler stats lb_stopbalance counter.  This counter can be
calculated by: lb_balanced - lb_nobusyg - lb_nobusyq.  There is no need to
create gazillion counters while we can derive the value.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Chen, Kenneth W 2006-12-10 02:20:35 -08:00 committed by Linus Torvalds
parent 783609c6cb
commit 06066714f6
2 changed files with 4 additions and 8 deletions
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1
include/linux/sched.h
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@ -707,7 +707,6 @@ struct sched_domain {
unsigned long lb_hot_gained[MAX_IDLE_TYPES];
unsigned long lb_nobusyg[MAX_IDLE_TYPES];
unsigned long lb_nobusyq[MAX_IDLE_TYPES];
unsigned long lb_stopbalance[MAX_IDLE_TYPES];
/* Active load balancing */
unsigned long alb_cnt;

11
kernel/sched.c
View file

@ -428,7 +428,7 @@ static inline void task_rq_unlock(struct rq *rq, unsigned long *flags)
* bump this up when changing the output format or the meaning of an existing
* format, so that tools can adapt (or abort)
*/
#define SCHEDSTAT_VERSION 13
#define SCHEDSTAT_VERSION 14
static int show_schedstat(struct seq_file *seq, void *v)
{
@ -466,7 +466,7 @@ static int show_schedstat(struct seq_file *seq, void *v)
seq_printf(seq, "domain%d %s", dcnt++, mask_str);
for (itype = SCHED_IDLE; itype < MAX_IDLE_TYPES;
itype++) {
seq_printf(seq, " %lu %lu %lu %lu %lu %lu %lu %lu %lu",
seq_printf(seq, " %lu %lu %lu %lu %lu %lu %lu %lu",
sd->lb_cnt[itype],
sd->lb_balanced[itype],
sd->lb_failed[itype],
@ -474,8 +474,7 @@ static int show_schedstat(struct seq_file *seq, void *v)
sd->lb_gained[itype],
sd->lb_hot_gained[itype],
sd->lb_nobusyq[itype],
sd->lb_nobusyg[itype],
sd->lb_stopbalance[itype]);
sd->lb_nobusyg[itype]);
}
seq_printf(seq, " %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
sd->alb_cnt, sd->alb_failed, sd->alb_pushed,
@ -2596,10 +2595,8 @@ static int load_balance(int this_cpu, struct rq *this_rq,
group = find_busiest_group(sd, this_cpu, &imbalance, idle, &sd_idle,
&cpus, balance);
if (*balance == 0) {
schedstat_inc(sd, lb_stopbalance[idle]);
if (*balance == 0)
goto out_balanced;
}
if (!group) {
schedstat_inc(sd, lb_nobusyg[idle]);