From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erik Rull Subject: Re: XP smp using a lot of CPU Date: Tue, 19 May 2009 19:35:19 +0200 Message-ID: <4A12EDD7.1010002@rdsoftware.de> References: <1242175298.15140.12.camel@iron.psg.net> <4A0B2C57.10900@rdsoftware.de> <4A10832C.7030308@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from moutng.kundenserver.de ([212.227.126.171]:54878 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751701AbZESRfW (ORCPT ); Tue, 19 May 2009 13:35:22 -0400 In-Reply-To: <4A10832C.7030308@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Hi Avi, here is the cpuinfo - what do you mean with "workload"? The CPU isage is around 33%. processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU T5600 @ 1.83GHz stepping : 2 cpu MHz : 1833.554 cache size : 2048 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no 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 nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 3667.98 clflush size : 64 processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU T5600 @ 1.83GHz stepping : 2 cpu MHz : 1833.554 cache size : 2048 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no 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 nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 3666.43 clflush size : 64 Best regards, Erik Avi Kivity wrote: > Erik Rull wrote: >> Hi all, >> >> very very interesting. >> >> I have a similar problem but the other way round. >> If my XP runs up tp 100% CPU usage "top" on the linux host reports >> "only" 33% cpu usage. I would expect around 50% because I only provide >> one core for the guest. I already increased the process priority of >> qemu and the io priority, nothing helped. The rest of the CPU is >> nearly idle, no excessive disk access this time :-) >> >> Any Idea what this could be? > > What workload is the guest running? > > What is your host cpu type (/proc/cpuinfo)? > > >