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How to change vCPU and pCPU mapping at runtime?

asked 2013-11-12 19:21:13 -0600

Flurion gravatar image

updated 2013-11-20 14:23:40 -0600

smaffulli gravatar image

Is it possible to change the mapping of vCPUs to pCPUs in OpenStack at runtime. For example, suppose I have a CPU socket with 4 cores (A, B, C, D) and four vCPUs (V1, V2, V3, V4). Also suppose in the beginning the mapping is as follows:

V1 -> A

V2 -> B

V3 -> C

V4 -> D

Would it be possible to change this mapping at runtime to something like this?

V1 -> B

V2 -> A

V3 -> C

V4 -> D

My goal is to do what I explained in my question and I am looking for a solution that does that. Since it is an academic research, I want to be able to that in code. Any idea on which hypervisors (preferably free and opensource ones) would help me solve this problem?

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what hypervisor are you using?

fifieldt gravatar imagefifieldt ( 2013-11-13 19:26:18 -0600 )edit

I actually don know. My goal is to do what I explained in my question and I am looking for a solution that does that. Since it is an academic research, I want to be able to that in code.

Flurion gravatar imageFlurion ( 2013-11-13 23:32:21 -0600 )edit

Any idea on which hypervisors (preferably free and opensource ones) support it? Thanks.

Flurion gravatar imageFlurion ( 2013-11-14 00:06:45 -0600 )edit

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answered 2013-11-13 23:49:22 -0600

fifieldt gravatar image

OK, well your first step is to support a hypervisor that supports this. OpenStack merely exposes what is possible in the hypervisor.

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Asked: 2013-11-12 19:21:13 -0600

Seen: 291 times

Last updated: Nov 20 '13