Re: [Qemu-discuss] qemu-system_x86_64 CPU pinning

[Rapelly, Varun]

Hi Ravi,

 

Yet to test the patch. Will let you know the result.

 

From: Bhattiprolu RaviKumar [mailto:address@hidden
Sent: Tuesday, February 02, 2016 12:42 PM
To: alex3kov <address@hidden>
Cc: Rapelly, Varun <address@hidden>; address@hidden
Subject: Re: [Qemu-discuss] qemu-system_x86_64 CPU pinning

 

Alex, Varun,

  Did the patch work for you? If you have done any improvements, can you please share the same?

regards,

Ravi

 

On Thu, Jan 21, 2016 at 10:18 PM, Bhattiprolu RaviKumar <address@hidden> wrote:

All,

  Attached is the patch over qemu-2.4.1. I have tested this on Centos7.1 with CentOS VMs using KVM. I am not sure how it effects other platforms.

It adds a new parameter "-vcpu" to command line. The usage example is " -vcpu 0,affinity=20" (pin VCPU 0 to CPU ID 20). Please see if it helps you.

regards,

Ravi

 

On Thu, Jan 21, 2016 at 3:56 PM, alex3kov <address@hidden> wrote:

I'm interested in that as well. Would you mind proposing your patch upstream?

 

 

---- On Thu, 21 Jan 2016 13:09:28 +0400 Bhattiprolu RaviKumar <address@hidden>wrote ----

 

Varun,

    I also have a similar requirement. I had patched the code over qemu 2.4.1 to add extra options to pin a VCPU to a physical CPU. I am not sure why this option is not there in qemu. (or I am not aware). If you use the taskset all the VCPU threads are getting same mask.

 

If you are interested, I can post the patch above qemu 2.4.1

regards,

Ravi