From mboxrd@z Thu Jan 1 00:00:00 1970 From: XliN Subject: Re: kvm (qemu) speed virtio Date: Wed, 05 Feb 2014 01:31:03 +0400 Message-ID: <52F15C17.3060700@gmail.com> References: <52F0F7C1.3010302@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: kvm@vger.kernel.org To: Marcus Return-path: Received: from mail-la0-f49.google.com ([209.85.215.49]:36704 "EHLO mail-la0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933630AbaBDVbH (ORCPT ); Tue, 4 Feb 2014 16:31:07 -0500 Received: by mail-la0-f49.google.com with SMTP id y1so6854902lam.22 for ; Tue, 04 Feb 2014 13:31:06 -0800 (PST) In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: 04.02.2014 20:32, Marcus =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > 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 bu= t > 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 wrote: >> Good day. Very little speed drives Virtio. Drivers are the latest gu= est 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/1471774/2b0baeae >> >> 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=20 the host system? =3D)