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| From: | Rik van Riel |
| Subject: | [Qemu-devel] Re: [PATCH] qemu-kvm: response to SIGUSR1 to start/stop a VCPU (v2) |
| Date: | Wed, 01 Dec 2010 12:26:36 -0500 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.8) Gecko/20100806 Fedora/3.1.2-1.fc13 Lightning/1.0b2pre Thunderbird/3.1.2 |
On 12/01/2010 12:22 PM, Peter Zijlstra wrote:
On Wed, 2010-12-01 at 09:17 -0800, Chris Wright wrote:Directed yield and fairness don't mix well either. You can end up feeding the other tasks more time than you'll ever get back.If the directed yield is always to another task in your cgroup then inter-guest scheduling fairness should be maintained. Yes, but not the inter-vcpu fairness.
The pause loop exiting & directed yield patches I am working on preserve inter-vcpu fairness by round robining among the vcpus inside one KVM guest. -- All rights reversed
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