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Date: Fri, 19 Sep 2008 17:49:24 +0900
From: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
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To: Ryo Tsuruta <ryov@valinux.co.jp>
CC: linux-kernel@vger.kernel.org, dm-devel@redhat.com,
       containers@lists.linux-foundation.org,
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Subject: Re: dm-ioband + bio-cgroup benchmarks
References: <20080918.210418.226794540.ryov@valinux.co.jp>
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Hi Tsuruta-san,

Ryo Tsuruta wrote:
> Hi All,
> 
> I have got excellent results of dm-ioband, that controls the disk I/O
> bandwidth even when it accepts delayed write requests.
> 
> In this time, I ran some benchmarks with a high-end storage. The
> reason was to avoid a performance bottleneck due to mechanical factors
> such as seek time.
> 
> You can see the details of the benchmarks at:
> http://people.valinux.co.jp/~ryov/dm-ioband/hps/
> 

I took a look at your beautiful results!
When you have time, would you explain me how you succeeded to check the
time, bandwidth, especially when you did write() tests? Actually, I tried
similar tests and failed to check the bandwidth correctly. Did you insert
something in the kernel source?

Thanks,
Takuya Yoshikawa