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From: Ryo Tsuruta <ryov@valinux.co.jp>
To: haotian.zhang@windriver.com
Cc: zumeng.chen@windriver.com, bruce.ashfield@windriver.com,
	linux-kernel@vger.kernel.org, dm-devel@redhat.com,
	containers@lists.linux-foundation.org,
	virtualization@lists.linux-foundation.org,
	xen-devel@lists.xensource.com, fernando@oss.ntt.co.jp
Subject: Re: [PATCH 0/2] dm-ioband: I/O bandwidth controller v1.8.0: Introduction
Date: Thu, 23 Oct 2008 20:28:51 +0900 (JST)	[thread overview]
Message-ID: <20081023.202851.112594221.ryov@valinux.co.jp> (raw)
In-Reply-To: <1224756158.8286.36.camel@pek-hzhang-d1>

Hi Haotian,

> The results are almost the same. I can not see any change of Direct I/O
> performance for this bio-cgroup kernel feature with dm-ioband support!
> 
> Does the methord to caculate throughout should be the Rate of xdd.linux
> output? 
> Dose my testing approach should be correct? If not, please help me point
> out.

Could you try to run the xdd programs simultaneously?
dm-ioband controls bandwidth while I/O requests are issued
simultaneously from processes which belong to different cgroup.
If I/O requests are only issued from processes which belong to one
cgroup, the processes can use the whole bandwidth.

The following URL is an example of how bandwidth is shared to I/O
load change.
http://people.valinux.co.jp/~ryov/dm-ioband/benchmark/partition1.html

Thanks,
Ryo Tsuruta

  reply	other threads:[~2008-10-23 11:29 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-17  7:09 Ryo Tsuruta
2008-10-17  7:10 ` [PATCH 1/2] dm-ioband: I/O bandwidth controller v1.8.0: Source code and patch Ryo Tsuruta
2008-10-17  7:11   ` [PATCH 2/2] dm-ioband: I/O bandwidth controller v1.8.0: Document Ryo Tsuruta
2008-10-20  8:40 ` [PATCH 0/2] dm-ioband: I/O bandwidth controller v1.8.0: Introduction Dong-Jae Kang
2008-10-20  9:01   ` Ryo Tsuruta
2008-10-20 10:13     ` Dong-Jae Kang
2008-10-20 12:48       ` Ryo Tsuruta
2008-10-21  2:00         ` KAMEZAWA Hiroyuki
2008-10-21 11:10 ` Chen Zumeng
2008-10-22  7:55   ` Chen Zumeng
2008-10-22  8:05     ` Ryo Tsuruta
2008-10-22  8:12       ` Chen Zumeng
2008-10-23 10:02       ` haotian
2008-10-23 11:28         ` Ryo Tsuruta [this message]
2008-10-22 10:38   ` Ryo Tsuruta

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