From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:49715) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TfW7L-0005Om-TI for qemu-devel@nongnu.org; Mon, 03 Dec 2012 08:31:33 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TfW7F-0002em-1t for qemu-devel@nongnu.org; Mon, 03 Dec 2012 08:31:27 -0500 Received: from mx1.redhat.com ([209.132.183.28]:26070) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TfW7E-0002ei-Qv for qemu-devel@nongnu.org; Mon, 03 Dec 2012 08:31:20 -0500 Message-ID: <50BCA9A4.9020800@redhat.com> Date: Mon, 03 Dec 2012 14:31:16 +0100 From: Kevin Wolf MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] slow HD performance in mingw List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Roy Tam Cc: qemu-devel Am 30.11.2012 16:36, schrieb Roy Tam: > 2012/11/30 Roy Tam : >> Hello all, >> >> I noticed that QEMU(both 1.2.1 and git head) acts very slow when >> accessing HD. I wonder if it is a fault in my build environment? >> > > and in same environment, I can see the speed decreases when version bumps: > http://roy.dnsd.me/qemu-0.15.1.png > http://roy.dnsd.me/qemu-1.0.50.png > http://roy.dnsd.me/qemu-1.0.91.png > http://roy.dnsd.me/qemu-1.2.91.png Can you bisect the exact commits at which each of these degradation steps happened? Kevin