linux-kernel - Re: [PATCH 0/3] optimize the queue idle judgment

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Date:   Tue, 20 Jul 2021 20:33:50 +0800
From:   "yukuai (C)" <yukuai3@...wei.com>
To:     <paolo.valente@...aro.org>, <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <yi.zhang@...wei.com>
Subject: Re: [PATCH 0/3] optimize the queue idle judgment

On 2021/07/14 17:45, Yu Kuai wrote:
> bfqq might plug I/O dispatch when it remains temporarily empty while
> being served, this will benefit for both sequence io bandwidth and relative
> sync io control.
> 
> This path set tries to extend the two special cases that idle is not
> needed, and can get better bandwidth.
> 
> 1) only one group is activated.
> 2) when more than one groups are activated, all queues are issuring
> requests with same size.
> 
> Yu Kuai (3):
>    block, bfq: do not idle if only one cgroup is activated
>    block, bfq: add support to record request size information
>    block, bfq: consider request size in bfq_asymmetric_scenario()
> 
>   block/bfq-iosched.c | 50 +++++++++++++++++++++++++++++++++++++--------
>   block/bfq-iosched.h | 16 +++++++++++++++
>   2 files changed, 57 insertions(+), 9 deletions(-)
> 

ping ...