From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1FftFR-0007TJ-Ea for qemu-devel@nongnu.org; Tue, 16 May 2006 02:41:37 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1FftFQ-0007Sf-2Q for qemu-devel@nongnu.org; Tue, 16 May 2006 02:41:36 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1FftFP-0007SP-PZ for qemu-devel@nongnu.org; Tue, 16 May 2006 02:41:35 -0400 Received: from [211.5.2.83] (helo=nm01omta01f.dion.ne.jp) by monty-python.gnu.org with smtp (Exim 4.52) id 1FftHz-0006ET-Je for qemu-devel@nongnu.org; Tue, 16 May 2006 02:44:15 -0400 Message-ID: <000e01c678b3$cd372460$0464a8c0@athlon> From: "Kazu" References: <200605152203.00826.mr@ramendik.ru> <44695113.8040708@us.ibm.com> Subject: Re: [Qemu-devel] objective benchmark? Date: Tue, 16 May 2006 15:41:45 +0900 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit 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 Anthony Liguori wrote: > Mikhail Ramendik wrote: >> Hello, >> >> As I have reported before, it seems that on my host linux system kqemu does >> not work with guest win98se. >> >> Is there any benchmark that I could run in the guest, with and without kqemu, >> to check if this is so objectively? (Ideally I'd like two benchmarks - 16-bit >> and 32-bit code). >> > > The vast majority of guest benchmarking programs are going to give you > invalid results. The clock within QEMU (rdtsc and wall clock) are not > very reliable and this is going to skew the results. > If you set /proc/sys/dev/rtc/max-user-freq to 1024 and disable cpuspeed service that is related to SpeedStep/PowerNow! on a host OS, the clock in guest OS works fine. I checked it on i686/x86_64 Linux host. Regards, Kazu