SCHED_ISO tasks should have their cpu accounting be a proportion of ticks that would normally be available for SCHED_NORMAL tasks.
Add ticks consumed by rt_tasks to the iso_ticks variable and comments.
Signed-off-by: Con Kolivas <[EMAIL PROTECTED]>
Index: linux-2.6.11-rc1-mm2/kernel/sched.c =================================================================== --- linux-2.6.11-rc1-mm2.orig/kernel/sched.c 2005-01-22 09:36:27.000000000 +1100 +++ linux-2.6.11-rc1-mm2/kernel/sched.c 2005-01-22 09:36:49.000000000 +1100 @@ -2499,7 +2499,13 @@ void scheduler_tick(void) task_t *p = current; rq->timestamp_last_tick = sched_clock(); - if (iso_task(p) && !rq->iso_refractory) + /* + * The iso_ticks accounting is incremented only when a SCHED_ISO task + * is running in soft rt mode. Running rt_tasks are also accounted + * to make the iso_cpu a proportion of cpu available for SCHED_NORMAL + * tasks only. + */ + if (rt_task(p) || (iso_task(p) && !rq->iso_refractory)) inc_iso_ticks(rq, p); else dec_iso_ticks(rq, p);
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