From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Jyi0p-0003ZC-6t for qemu-devel@nongnu.org; Wed, 21 May 2008 02:41:23 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Jyi0m-0003WE-SF for qemu-devel@nongnu.org; Wed, 21 May 2008 02:41:22 -0400 Received: from [199.232.76.173] (port=43973 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Jyi0m-0003W3-Kp for qemu-devel@nongnu.org; Wed, 21 May 2008 02:41:20 -0400 Received: from rv-out-0708.google.com ([209.85.198.251]:40234) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1Jyi0m-0000dU-5i for qemu-devel@nongnu.org; Wed, 21 May 2008 02:41:20 -0400 Received: by rv-out-0708.google.com with SMTP id f25so2014745rvb.22 for ; Tue, 20 May 2008 23:41:19 -0700 (PDT) Message-ID: <761ea48b0805202341y3b598311t24444d8020a1e25a@mail.gmail.com> Date: Wed, 21 May 2008 08:41:18 +0200 From: "Laurent Desnogues" Subject: Re: [Qemu-devel] Performance Monitoring In-Reply-To: <200805202306.45277.paul@codesourcery.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <3000d2e90805201156g30050a68ve9187e3b94341e99@mail.gmail.com> <200805202306.45277.paul@codesourcery.com> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org On 5/21/08, Paul Brook wrote: > > get full CPU opcode statistics (how many times > > every opcode was executed). ... > You probably already know this, but I'd be surprised if the statistics you get > have much/any correlation with real world performance on modern hardware. The OP wants to count instruction opcodes, not cycles or other timing dependent statistics. Is there something that prevents exact counting of that? Laurent