From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:37520) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QaIhg-0001rD-UQ for qemu-devel@nongnu.org; Fri, 24 Jun 2011 22:34:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QaIhf-0005jr-SF for qemu-devel@nongnu.org; Fri, 24 Jun 2011 22:34:36 -0400 Received: from mta-1.ms.rz.rwth-aachen.de ([134.130.7.72]:41160) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QaIhf-0005jZ-H8 for qemu-devel@nongnu.org; Fri, 24 Jun 2011 22:34:35 -0400 MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=ISO-8859-1; format=flowed Received: from ironport-out-1.rz.rwth-aachen.de ([134.130.5.40]) by mta-1.ms.rz.RWTH-Aachen.de (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008)) with ESMTP id <0LNB00FMYR5KO2J0@mta-1.ms.rz.RWTH-Aachen.de> for qemu-devel@nongnu.org; Sat, 25 Jun 2011 04:34:32 +0200 (CEST) Received: from [172.23.23.148] ([unknown] [87.79.236.180]) by relay-auth-1.ms.rz.rwth-aachen.de (Sun Java(tm) System Messaging Server 7.0-3.01 64bit (built Dec 9 2008)) with ESMTPA id <0LNB008RLR5HF370@relay-auth-1.ms.rz.rwth-aachen.de> for qemu-devel@nongnu.org; Sat, 25 Jun 2011 04:34:32 +0200 (CEST) Message-id: <4E054935.4060406@rwth-aachen.de> Date: Sat, 25 Jun 2011 04:34:29 +0200 From: "felix.matenaar@rwth-aachen" Subject: [Qemu-devel] QEMU timing requirements List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Hello, I am currently implementing some heuristics using a patched qemu (i386-softmmu). Two of them take some time for each vm memory access. If I run them both, suddenly qemu segfaults while executing a BBL. Using just one of them never triggers this problem. Are there any known timing issues that could lead to the problem? Running Qemu with one cpu in one single process with a Windows XP guest OS. Regards, Felix