From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dor Laor Subject: Re: rtl8139 stop working under high load Date: Sat, 12 Jul 2008 15:36:05 +0300 Message-ID: <4878A535.8020102@qumranet.com> References: <48777F62.4070104@lfarkas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Farkas Levente Return-path: Received: from il.qumranet.com ([212.179.150.194]:14409 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752916AbYGLMhk (ORCPT ); Sat, 12 Jul 2008 08:37:40 -0400 In-Reply-To: <48777F62.4070104@lfarkas.org> Sender: kvm-owner@vger.kernel.org List-ID: Farkas Levente wrote: > hi, > i'm just switch to the use rtl8139 network emulator in kvm-70 for the > guests, but under high load it's simple stop working. a reboot or even a > service network restart > solve the problem, but imho there should have to be some bug in the > qemu's rtl8139 code. and there is not any kind of error in any log > (neither the host's nor the guest's). > this not happened with e1000. but with e1000 the network sometimes > seems to breathing (sometimes slow down and then speed up again). > do currently which is the preferred network network device in qemu/kvm? > thanks. > I think rtl8139 is the most stable, and afterwards virtio and e1000 (which both perform much better too). Maybe it's irq problem. Can you run the same test with -no-kvm-irqchip ?