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Re: [Qemu-devel] any known virtio-net regressions in Qemu 2.7?
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From: |
Stefan Priebe - Profihost AG |
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Subject: |
Re: [Qemu-devel] any known virtio-net regressions in Qemu 2.7? |
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Date: |
Mon, 19 Dec 2016 19:37:30 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 |
Am 19.12.2016 um 12:03 schrieb Stefan Hajnoczi:
> On Fri, Dec 16, 2016 at 10:00:36PM +0100, Stefan Priebe - Profihost AG wrote:
>>
>> Am 15.12.2016 um 07:46 schrieb Alexandre DERUMIER:
>>> does rollbacking the kernel to previous version fix the problem ?
>>
>> The culprit is the used tuned agent from Redhat
>> (https://github.com/redhat-performance/tuned). The used profile
>> virtual-host results in these problems. Stopping tuned or using another
>> profile like throughput-performance everything is fine again.
>
> Interesting discovery. Have you filed a bug report about it?
As we're not using RHEL, nor CentOS i didn't expect this to make sense
;-) I just believed that something in the kernel changed.
Greets,
Stefan
>> after upgrading a cluster OS, Qemu, ... i'm experiencing slow and
>> volatile network speeds inside my VMs.
>>
>> Currently I've no idea what causes this but it's related to the host
>> upgrades. Before i was running Qemu 2.6.2.
>>
>> I'm using virtio for the network cards.
>
> Stefan
>