Messages in this thread Patch in this message | | | From | Con Kolivas <> | Subject | [PATCH][2/4] sched: add discrete weighted cpu load function | Date | Mon, 13 Mar 2006 19:06:11 +1100 |
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When the type of weighting is known to be zero we can use a simpler version of source_load with a weighted_cpuload() function. Export that function to allow relative weighted cpu load to be used by other subsystems if desired.
Signed-off-by: Con Kolivas <kernel@kolivas.org>
--- include/linux/sched.h | 1 + kernel/sched.c | 10 ++++++++-- 2 files changed, 9 insertions(+), 2 deletions(-)
Index: linux-2.6.16-rc6-mm1/include/linux/sched.h =================================================================== --- linux-2.6.16-rc6-mm1.orig/include/linux/sched.h 2006-03-13 13:25:31.000000000 +1100 +++ linux-2.6.16-rc6-mm1/include/linux/sched.h 2006-03-13 18:29:34.000000000 +1100 @@ -102,6 +102,7 @@ extern int nr_processes(void); extern unsigned long nr_running(void); extern unsigned long nr_uninterruptible(void); extern unsigned long nr_iowait(void); +extern unsigned long weighted_cpuload(const int cpu); #include <linux/time.h> #include <linux/param.h> Index: linux-2.6.16-rc6-mm1/kernel/sched.c =================================================================== --- linux-2.6.16-rc6-mm1.orig/kernel/sched.c 2006-03-13 13:25:39.000000000 +1100 +++ linux-2.6.16-rc6-mm1/kernel/sched.c 2006-03-13 17:05:26.000000000 +1100 @@ -914,6 +914,12 @@ inline int task_curr(const task_t *p) return cpu_curr(task_cpu(p)) == p; } +/* Used instead of source_load when we know the type == 0 */ +unsigned long weighted_cpuload(const int cpu) +{ + return (cpu_rq(cpu)->raw_weighted_load); +} + #ifdef CONFIG_SMP typedef struct { struct list_head list; @@ -1114,7 +1120,7 @@ find_idlest_cpu(struct sched_group *grou cpus_and(tmp, group->cpumask, p->cpus_allowed); for_each_cpu_mask(i, tmp) { - load = source_load(i, 0); + load = weighted_cpuload(i); if (load < min_load || (load == min_load && i == this_cpu)) { min_load = load; @@ -2186,7 +2192,7 @@ static runqueue_t *find_busiest_queue(st int i; for_each_cpu_mask(i, group->cpumask) { - load = source_load(i, 0); + load = weighted_cpuload(i); if (load > max_load) { max_load = load; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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