linux – CFQ io调度程序的空闲调度类的“定义宽限期”有多长？

发布时间：2020-12-13 16:52:07 所属栏目：Linux 来源：网络整理

导读：ionice手册页说 A program running with idle io priority will only get disk time when no other program has asked for disk io for a defined grace period. 这个“宽限期”在哪里定义？它是可见的/可调的(也许通过/ sys)？解决方法宽限期为250毫秒. h

ionice手册页说

A program running with idle io priority will only get disk time
when no other program has asked for disk io for a defined grace period.

这个“宽限期”在哪里定义？它是可见的/可调的(也许通过/ sys)？

解决方法

宽限期为250毫秒.

http://lkml.indiana.edu/hypermail/linux/kernel/0412.2/1099.html

There is an idle scheduling class,which only runs when nothing else
is using the disk. A grace period is defined for which idle has to
wait before getting disk access when other io has run. This defaults
to 250ms currently.

您没有提供操作系统版本或发行版(是的,它确实有所作为),但RHEL / CentOS 5 6的可调参数为defined here,为/ sys / block / [device] / queue / iosched /中的fifo_expire_async(其中) [device]是sda,sdb,cciss0等.

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!