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xen-devel
[Xen-devel] Re: [PATCH 0/2] dm-ioband: I/O bandwidth controller v1.8.0:
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To: |
haotian.zhang@xxxxxxxxxxxxx |
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Subject: |
[Xen-devel] Re: [PATCH 0/2] dm-ioband: I/O bandwidth controller v1.8.0: Introduction |
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From: |
Ryo Tsuruta <ryov@xxxxxxxxxxxxx> |
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Date: |
Thu, 23 Oct 2008 20:28:51 +0900 (JST) |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, containers@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxx, fernando@xxxxxxxxxxxxx, bruce.ashfield@xxxxxxxxxxxxx, zumeng.chen@xxxxxxxxxxxxx |
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Thu, 23 Oct 2008 04:29:14 -0700 |
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<1224756158.8286.36.camel@pek-hzhang-d1> |
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<48FEDC63.308@xxxxxxxxxxxxx> <20081022.170536.193712541.ryov@xxxxxxxxxxxxx> <1224756158.8286.36.camel@pek-hzhang-d1> |
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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
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