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From: "Bob Chen" <175818323@163.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] cgroup blkio weight has no effect on qemu
Date: Wed, 20 Jan 2016 17:37:10 +0800 (CST)	[thread overview]
Message-ID: <1539619f.10c67.1525e651a53.Coremail.175818323@163.com> (raw)

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Hi folks,



Could you enlighten me how to achieve proportional IO sharing by using cgroup, instead of qemu's io-throttling?


My qemu config is like: -drive file=$DISKFILe,if=none,format=qcow2,cache=none,aio=native -device virtio-blk-pci...


Test command inside vm is like: dd if=/dev/vdc of=/dev/null iflag=direct


Cgroup blkio weight of the qemu process is properly configured as well.


But no matter how change the proportion, such as vm1=400 and vm2=100, I can only get the equal IO speed.


Wondering cgroup blkio.weight or blkio.weight_device has no effect on qemu?




PS. cache=writethrough aio=threads is also tested, the same results. 




- Bob





 

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             reply	other threads:[~2016-01-20  9:37 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-20  9:37 Bob Chen [this message]
  -- strict thread matches above, loose matches on Subject: below --
2016-01-20 10:41 [Qemu-devel] cgroup blkio weight has no effect on qemu 陈博
2016-01-20 14:52 ` Daniel P. Berrange
2016-01-20 10:15 Bob Chen
2016-01-20  9:55 Bob Chen
2016-01-20  9:51 Bob Chen
2016-01-20  9:43 陈博
2016-01-20  9:29 Bob Chen
2016-01-19  9:59 陈博

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