Hi, Ryo Tsuruta I tested dm-ioband( the latest release, ver 1.7.0 ) IO controller, but I had a strange result from it. I have something wrong in test process? The test process and results are in attached file. Can you check my testing result and give me a helpful advices and comments? As you can show in attached file, I tested 4 cases in dm-ioband with tiobench() IO testing tool like as below - 1) 3 cgroups with different weight in same ioband device(ioband1) : Buffered IO - 2) 3 cgroups with different weight in same ioband device(ioband1) : Direct IO - 3) 3 cgroups with different weight in each ioband divice(ioband1, 2, 3) : Buffered IO - 4) 3 cgroups with different weight in each ioband divice(ioband1, 2, 3) : Direct IO But, IO bandwidth was not nearly controlled by dm-ioband You can refer the testing tool, tiobench, in http://sourceforge.net/projects/tiobench/ Originally, tiobench don't support the direct IO mode testing, so I added the O_DIRECT option to tiobench source code and recompile it to test the Direct IO cases Thanks, Dong-Jae, Kang --------------------------------------------------------------------- 2008/10/3 Ryo Tsuruta <ryov@xxxxxxxxxxxxx>: > Hi everyone, > > This is the dm-ioband version 1.7.0 release. > > Dm-ioband is an I/O bandwidth controller implemented as a device-mapper > driver, which gives specified bandwidth to each job running on the same > physical device. > > - Can be applied to the kernel 2.6.27-rc5-mm1. > - Changes from 1.6.0 (posted on Sep 24, 2008): > - Fix a problem that processes issuing I/Os are permanently blocked > when I/O requests to reclaim pages are consecutively issued. > > You can apply the latest bio-cgroup patch to this dm-ioband version. > The bio-cgroup provides a BIO tracking mechanism with dm-ioband. > Please see the following site for more information: > Block I/O tracking > http://people.valinux.co.jp/~ryov/bio-cgroup/ > > Thanks, > Ryo Tsuruta > _______________________________________________ > Containers mailing list > Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx > https://lists.linux-foundation.org/mailman/listinfo/containers >
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