linux-kernel - Re: [PATCH 00/26] AIO performance improvements/cleanups, v2

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Message-ID: <50CC7840.4090403@fusionio.com>
Date:	Sat, 15 Dec 2012 14:16:48 +0100
From:	Jens Axboe <jaxboe@...ionio.com>
To:	Kent Overstreet <koverstreet@...gle.com>
CC:	Jack Wang <jack.wang.usish@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-aio@...ck.org" <linux-aio@...ck.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"zab@...hat.com" <zab@...hat.com>,
	"bcrl@...ck.org" <bcrl@...ck.org>,
	"jmoyer@...hat.com" <jmoyer@...hat.com>,
	"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 00/26] AIO performance improvements/cleanups, v2

On 2012-12-15 11:36, Kent Overstreet wrote:
>> Knock yourself out - I already took a quick look at it, and conversion
>> should be pretty simple. It's the mtip32xx driver, it's in the kernel. I
>> would suggest getting rid of the ->async_callback() (since it's always
>> bio_endio()) since that'll make it cleaner.
> 
> Just pushed my conversion - it's untested, but it's pretty
> straightforward.

You forgot a batch_complete_init(). With that, it works. Single device
is ~1050K now, so still slower than jaio without batching (which was
~1220K).  But it's an improvement over kaio-dio, which was roughly ~930K
IOPS.

-- 
Jens Axboe

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