From: Jens Axboe <axboe@kernel.dk>
To: Ming Lei <ming.lei@redhat.com>
Cc: linux-block@vger.kernel.org,
Kashyap Desai <kashyap.desai@broadcom.com>,
Laurence Oberman <loberman@redhat.com>,
Omar Sandoval <osandov@fb.com>, Christoph Hellwig <hch@lst.de>,
Bart Van Assche <bart.vanassche@wdc.com>,
Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH V5] blk-mq: dequeue request one by one from sw queue iff hctx is busy
Date: Tue, 3 Jul 2018 09:04:06 -0600 [thread overview]
Message-ID: <b208e0a1-0a41-654e-aad8-fb4a7df2967a@kernel.dk> (raw)
In-Reply-To: <20180703145845.18140-1-ming.lei@redhat.com>
On 7/3/18 8:58 AM, Ming Lei wrote:
> It won't be efficient to dequeue request one by one from sw queue,
> but we have to do that when queue is busy for better merge performance.
>
> This patch takes the Exponential Weighted Moving Average(EWMA) to figure
> out if queue is busy, then only dequeue request one by one from sw queue
> when queue is busy.
Applied, thanks.
--
Jens Axboe
prev parent reply other threads:[~2018-07-03 15:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-03 14:58 [PATCH V5] blk-mq: dequeue request one by one from sw queue iff hctx is busy Ming Lei
2018-07-03 15:04 ` Jens Axboe [this message]
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