From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: AW: AW: AW: AW: KVM performance Date: Tue, 14 Apr 2009 11:47:50 +0300 Message-ID: <49E44DB6.3010701@redhat.com> References: <133D9897FB9C5E4E9DF2779DC91E947C518348@SLFSNX.rcs.alcatel-research.de> <49D9EB48.4030709@redhat.com> <133D9897FB9C5E4E9DF2779DC91E947C51834A@SLFSNX.rcs.alcatel-research.de> <49DA2F54.8090109@redhat.com> <133D9897FB9C5E4E9DF2779DC91E947C51834E@SLFSNX.rcs.alcatel-research.de> <49DB8E8A.1090908@redhat.com> <133D9897FB9C5E4E9DF2779DC91E947C518350@SLFSNX.rcs.alcatel-research.de> <133D9897FB9C5E4E9DF2779DC91E947C518355@SLFSNX.rcs.alcatel-research.de> <49E0C30B.1000209@redhat.com> <133D9897FB9C5E4E9DF2779DC91E947C518356@SLFSNX.rcs.alcatel-research.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: "BRAUN, Stefanie" Return-path: Received: from mx2.redhat.com ([66.187.237.31]:43865 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750746AbZDNIrb (ORCPT ); Tue, 14 Apr 2009 04:47:31 -0400 In-Reply-To: <133D9897FB9C5E4E9DF2779DC91E947C518356@SLFSNX.rcs.alcatel-research.de> Sender: kvm-owner@vger.kernel.org List-ID: BRAUN, Stefanie wrote: > Hello, > the host runs on a Dual-Core AMD Opteron Processor. > Does there exist a similar AMD parameter? > You can add individual host cpu features by using '-cpu qemu64,+feature', where feature is taken from the host /proc/cpuinfo. Do you know which cpu features the program can take advantage of? Also please try replacing the constant 0x0007040600070406ULL in kernel/x86/svm.c with 0x0606060606060606ULL and see what happens (don't forget to reload the modules). -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.