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Re: [Qemu-devel] [dpdk-dev] [PATCH v4 00/10] VM Power Management
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [dpdk-dev] [PATCH v4 00/10] VM Power Management |
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Date: |
Fri, 12 Dec 2014 17:13:55 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
On 12/12/2014 17:10, Thomas Monjalon wrote:
> > Ok, this looks specific enough that an out-of-band solution within DPDK
> > sounds like the best approach. It seems unnecessary to involve the
> > hypervisor (neither KVM nor QEMU).
>
> Paolo, I don't understand why you don't imagine controlling frequency scaling
> of a pinned vCPU transparently?
Probably because I don't imagine controlling frequency scaling from the
application on bare metal, either. :) It seems to me that this is just
working around limitations of the kernel.
Paolo
> In my understanding, we currently cannot control frequency scaling without
> knowing wether we are in a VM or not.