Re: [PATCH RESEND] Blk-throttle: reduce tail io latency when iops limit is enforced

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On 8/9/18 11:47 AM, Liu Bo wrote:
> When an application's iops has exceeded its cgroup's iops limit, surely it
> is throttled and kernel will set a timer for dispatching, thus IO latency
> includes the delay.
> 
> However, the dispatch delay which is calculated by the limit and the
> elapsed jiffies is suboptimal.  As the dispatch delay is only calculated
> once the application's iops is (iops limit + 1), it doesn't need to wait
> any longer than the remaining time of the current slice.

Applied, thanks.

-- 
Jens Axboe




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