From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1GSUl5-0006DC-L7 for qemu-devel@nongnu.org; Wed, 27 Sep 2006 04:27:11 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1GSUl3-0006Ak-In for qemu-devel@nongnu.org; Wed, 27 Sep 2006 04:27:10 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1GSUl3-0006AO-D6 for qemu-devel@nongnu.org; Wed, 27 Sep 2006 04:27:09 -0400 Received: from [199.232.41.67] (helo=mx20.gnu.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1GSUps-0003Pc-7c for qemu-devel@nongnu.org; Wed, 27 Sep 2006 04:32:08 -0400 Received: from [64.233.166.178] (helo=py-out-1112.google.com) by mx20.gnu.org with esmtp (Exim 4.52) id 1GSUl2-0004Kl-Lb for qemu-devel@nongnu.org; Wed, 27 Sep 2006 04:27:08 -0400 Received: by py-out-1112.google.com with SMTP id x31so171812pye for ; Wed, 27 Sep 2006 01:27:07 -0700 (PDT) Message-ID: <56d259a00609270127x1d825a5eo481057d8123cf16d@mail.gmail.com> Date: Wed, 27 Sep 2006 09:27:07 +0100 From: "Martin Guy" Subject: Re: [Qemu-devel] A question about QEMU performance In-Reply-To: <29036817.1159299723859.JavaMail.root@eastrmwml06.mgt.cox.net> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <29036817.1159299723859.JavaMail.root@eastrmwml06.mgt.cox.net> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: sol10x86@cox.net, qemu-devel@nongnu.org > > If I run qemu for i386 without kqemu it uses soft-mmu, so it operates as > > another architetture as ppc or mips right? > > So... are the performace of qemu the same if I use i386 or mips or something > > change deeply? > > Example: if I run the same program on i386 emulation without kqemu or on > > mips are the performance circa the same? > > Would you expect qemu to perform the same on an AMD 4600X2 as > a 400 Mhz MIPS? There are some statistics at freaknet.org/martin/QEMU for various types of x86 processor, but giving only BogoMIPS, which are way overrated. I presume this is cos QEMU translates the kernel speed test loop once then runs it as x86 code, while "real" tasks need to be translated all the time. The only concrete figures I have are from when I timed the running of bash's configure script, which causes a lot of program execution as well as compiling and running lots of short test programs. The results are in cluster.aleph1.co.uk/~martin/qemu.html (please ignore the other garbage on that page!) M