linux-kernel - Re: [PATCH v2 0/3] Improve virtio-blk performance

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Message-ID: <CAJSP0QXOn-5Krm6hSMmm=zRYkG43k9F4Xe6P+ENMFtgMhTupFA@mail.gmail.com>
Date:	Mon, 18 Jun 2012 10:14:09 +0100
From:	Stefan Hajnoczi <stefanha@...il.com>
To:	Asias He <asias@...hat.com>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v2 0/3] Improve virtio-blk performance

On Mon, Jun 18, 2012 at 7:53 AM, Asias He <asias@...hat.com> wrote:
> Fio test shows it gives, 28%, 24%, 21%, 16% IOPS boost and 32%, 17%, 21%, 16%
> latency improvement for sequential read/write, random read/write respectively.

Sounds great.  What storage configuration did you use (single spinning
disk, SSD, storage array) and are these numbers for parallel I/O or
sequential I/O?

What changed since Minchan worked on this?  I remember he wasn't
satisfied that this was a clear win.  Your numbers are strong so
either you fixed something important or you are looking at different
benchmark configurations.

Stefan
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