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Re: [Qemu-discuss] Latency degradation on VM due to several QEMU process

From: Alex
Subject: Re: [Qemu-discuss] Latency degradation on VM due to several QEMU processes on the host.
Date: Sun, 19 Jun 2016 15:40:08 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1

Take a look at Qemu's realtime feature, might be what you need.



/--Regards, Alex/

On 19/06/16 14:38, Yan Fridland wrote:

Can you please comment on the overhead QEMU brings in terms of latency
and CPU utilization?

I am running a highly latency sensitive application on my VMs and I see
some degradation in performance when running 2 QEMU processes on a
single core, or even when I run 1 QEMU process on a single core without
a dedicated affinity and RT priority to the QEMU process.

Can I make the QEMU lighter to be able to run 2,3 or more QEMUs on a
single core? Is it matter of XML configuration / affinity / priority or
anything else?

Thank you,


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