kvm (qemu) speed virtio

kvm (qemu) speed virtio

[XliN]

Good day. Very little speed drives Virtio. Drivers are the latest guest 
on the system "Windows server 2008". Host system centos 6.5.

All that can be tried, but failed to increase the speed. And there I 
have a database running.

Screenshots test speed drives

http://itmages.ru/image/view/1471772/feec35c3 
<http://itmages.ru/image/view/1471772/feec35c3>
http://itmages.ru/image/view/1471774/2b0baeae 
<http://itmages.ru/image/view/1471774/2b0baeae>
http://itmages.ru/image/view/1471785/9fffb8f5 
<http://itmages.ru/image/view/1471785/9fffb8f5>

Thanks in advance. Apply nowhere else.

Re: kvm (qemu) speed virtio

[Marcus]

We may have seen this as well. Initial speed tests were actually
pretty good, but after running a few IO test it would actually cause
the physical disks that were dedicated to the windows vm host side to
be stuck at 100% util with no throughput for 30 seconds at a time
according to iostat. We were using noop scheduler on the disks. I
think it's something with your host, as we stopped seeing it when we
moved from stock CentOS 6.5 kernel to vanilla 3.10 kernel. Sorry I
don't have more info on the cause, we saw the issue for a few days but
were already upgrading due to the need for vxlan, so we didn't bother
investigating.

On Tue, Feb 4, 2014 at 7:22 AM, XliN <saikov.vb@gmail.com> wrote:
> Good day. Very little speed drives Virtio. Drivers are the latest guest on
> the system "Windows server 2008". Host system centos 6.5.
>
> All that can be tried, but failed to increase the speed. And there I have a
> database running.
>
> Screenshots test speed drives
>
> http://itmages.ru/image/view/1471772/feec35c3
> <http://itmages.ru/image/view/1471772/feec35c3>
> http://itmages.ru/image/view/1471774/2b0baeae
> <http://itmages.ru/image/view/1471774/2b0baeae>
> http://itmages.ru/image/view/1471785/9fffb8f5
> <http://itmages.ru/image/view/1471785/9fffb8f5>
>
> Thanks in advance. Apply nowhere else.
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: kvm (qemu) speed virtio

[XliN]

04.02.2014 20:32, Marcus пишет:
> We may have seen this as well. Initial speed tests were actually
> pretty good, but after running a few IO test it would actually cause
> the physical disks that were dedicated to the windows vm host side to
> be stuck at 100% util with no throughput for 30 seconds at a time
> according to iostat. We were using noop scheduler on the disks. I
> think it's something with your host, as we stopped seeing it when we
> moved from stock CentOS 6.5 kernel to vanilla 3.10 kernel. Sorry I
> don't have more info on the cause, we saw the issue for a few days but
> were already upgrading due to the need for vxlan, so we didn't bother
> investigating.
>
> On Tue, Feb 4, 2014 at 7:22 AM, XliN <saikov.vb@gmail.com> wrote:
>> Good day. Very little speed drives Virtio. Drivers are the latest guest on
>> the system "Windows server 2008". Host system centos 6.5.
>>
>> All that can be tried, but failed to increase the speed. And there I have a
>> database running.
>>
>> Screenshots test speed drives
>>
>> http://itmages.ru/image/view/1471772/feec35c3
>> <http://itmages.ru/image/view/1471772/feec35c3>
>> http://itmages.ru/image/view/1471774/2b0baeae
>> <http://itmages.ru/image/view/1471774/2b0baeae>
>> http://itmages.ru/image/view/1471785/9fffb8f5
>> <http://itmages.ru/image/view/1471785/9fffb8f5>
>>
>> Thanks in advance. Apply nowhere else.
>> --
>> To unsubscribe from this list: send the line "unsubscribe kvm" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
Offer a kernel upgrade to 3.10 on centos 6.5? Whether it will survive 
the host system? =)