默认情况下sysctl_sched_wakeup_granularity为1 msec * (1 + ilog(ncpus)),比如4核机器默认值为3ms。 Linux v5.13之前的版本可以通过echo X > /proc/sys/kernel/sched_wakeup_granularity或者sudo sysctl kernel.sched_wakeup_granularity_ns=X进行修改。 Linux v5.13以后参数被移动到了/sys/kernel/debug/sched/...
默认情况下sysctl_sched_wakeup_granularity为1 msec * (1 + ilog(ncpus)),比如4核机器默认值为3ms。 Linux v5.13之前的版本可以通过echo X > /proc/sys/kernel/sched_wakeup_granularity或者sudo sysctl kernel.sched_wakeup_granularity_ns=X进行修改。 Linux v5.13以后参数被移动到了/sys/kernel/debug/sched/...
} 【2】wakeup_preempt_entity()函数根据sysctl_sched_wakeup_granularity加权平均值和虚拟虚拟运行时间确定是否触发唤醒任务p抢占当前任务curr,伪代码如下: staticintwakeup_preempt_entity(structsched_entity *curr,structsched_entity *se) {//计算当前任务与被唤醒任务虚拟时间差值s64 gran, vdiff = curr->vrunti...
patch很小,优化效果不明确,但是很有意思; [PATCH 0/2] sched/fair: Enhance sync wakeup for short duration tasksfalse sharing是个一直避不开的问题,在patch中,介绍了false sharing可以通过perf c2c方式,…
在下文中一共展示了sched_clock_idle_wakeup_event函数的13个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。 示例1: acpi_idle_enter_simple ▲点赞 7▼ /** * acpi_idle_enter_simple - enters an ACPI state without BM ...
sched: do not wakeup-preempt with SCHED_BATCH tasks do not wakeup-preempt with SCHED_BATCH tasks, their preemption is batched too, driven by the tick. Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]> --- kernel/sched_fair.c | 6 +++++ 1 files changed, 6 insertions(+), 0 deletions...
> cfs_rq->min_vruntime, based on pre-EEVDF behavior, last seen at: > > af4cf40470c2 sched/fair: Add cfs_rq::avg_vruntime > > If there was no such benefit for woken up tasks. Then the scenario I observed > is just conincidentally worse with EEVDF, which can happen when exch...
reactive c1ock synchronization for wire1ess sensor networks with asynchronous wakeup schedu1ingMost of the existing clock synchronization algorithms for wireless sensor networks can be viewed as proactive clock synchronization since they require nodes to periodically synchronize their clock to a reference ...
+ p->sched_class->task_wake_up(rq, p); +#endif out: task_rq_unlock(rq, &flags); @@ -1748,7 +1751,10 @@ void fastcall wake_up_new_task(struct task_struct *p, unsigned long clone_flags) inc_nr_running(p, rq); } check_preempt_curr(rq, p); - wakeup_balance_rt(rq, p);...