From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: Re: strange guest slowness after some time Date: Tue, 31 Mar 2009 10:50:24 +0200 Message-ID: <49D1D950.7040809@wpkg.org> References: <49B29705.6000904@wpkg.org> <49B4E7A6.3090601@redhat.com> <49B4EDC9.9020504@wpkg.org> <49B4EE8F.7050001@redhat.com> <49BD007C.9030809@wpkg.org> <49BF7FB6.9080503@wpkg.org> <49BF8686.5050707@redhat.com> <49BF88BE.7040805@wpkg.org> <49BFC276.1080600@gmx.net> <49BFC53D.3020809@wpkg.org> <49BFD752.9050706@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: avi@redhat.com, kvm@vger.kernel.org, Rusty Russell , Anthony Liguori , "David S. Ahern" To: Felix Leimbach Return-path: Received: from mx03.syneticon.net ([78.111.66.105]:39752 "EHLO mx03.syneticon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751009AbZCaIud (ORCPT ); Tue, 31 Mar 2009 04:50:33 -0400 In-Reply-To: <49BFD752.9050706@gmx.net> Sender: kvm-owner@vger.kernel.org List-ID: Felix Leimbach schrieb: > Tomasz Chmielewski wrote: >> Felix Leimbach schrieb: >>> Out of 3 e1000 guests none has ever been hit. >>> >>> Observed with kvm-83 and kvm-84 with the host running in-kernel KVM >>> code (linux 2.6.25.7) >> Could you add a (unused) e1000 interface to your virtio guests? >> As this issue happens rarely for me, maybe you could help to reproduce >> it as well (i.e. if network gets slow on virtio interface, give e1000 >> a IP address, and try if network is also slow on e1000 on the very >> same guest). > Will do and report >> >> BTW, what CPU do you have? > One dual core Opteron 2212 > Note: I will upgrade to two Shanghai Quad-Cores in 2 weeks and test with > those as well. I have this "slowness" on an Intel CPU as well, after about 10 days of guest uptime (using virtio net): processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU 3050 @ 2.13GHz stepping : 6 cpu MHz : 2133.410 cache size : 2048 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4266.87 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: -- Tomasz Chmielewski http://wpkg.org