Messages in this thread Patch in this message | | | From | Christian Borntraeger <> | Subject | [patch 2/2] Let process accouting trust sched_clock. | Date | Thu, 23 Aug 2007 21:29:54 +0200 |
| |
Currently the scheduler does sanity checking on sched_clock and corrects the values. Remove some of these checks to make steal time influence the process time. This patch is probably nothing for upstream but with this patch the accouting for s390 seems to work regarding steal time, even without CONFIG_VIRT_CPU_TIME (as long as CONFIG_VIRT_TIMER is y).
--- kernel/sched.c | 6 ------ 1 file changed, 6 deletions(-)
Index: linux-2.6/kernel/sched.c =================================================================== --- linux-2.6.orig/kernel/sched.c +++ linux-2.6/kernel/sched.c @@ -3310,19 +3310,13 @@ void account_steal_time(struct task_stru void scheduler_tick(void) { int cpu = smp_processor_id(); struct rq *rq = cpu_rq(cpu); struct task_struct *curr = rq->curr; - u64 next_tick = rq->tick_timestamp + TICK_NSEC; spin_lock(&rq->lock); __update_rq_clock(rq); - /* - * Let rq->clock advance by at least TICK_NSEC: - */ - if (unlikely(rq->clock < next_tick)) - rq->clock = next_tick; rq->tick_timestamp = rq->clock; update_cpu_load(rq); if (curr != rq->idle) /* FIXME: needed? */ curr->sched_class->task_tick(rq, curr); spin_unlock(&rq->lock); - 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/
| |