From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49554) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WH8RP-0008EW-Or for qemu-devel@nongnu.org; Sat, 22 Feb 2014 04:00:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WH8RH-0002nC-Ch for qemu-devel@nongnu.org; Sat, 22 Feb 2014 04:00:11 -0500 Received: from mail-ee0-x231.google.com ([2a00:1450:4013:c00::231]:41367) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WH8RH-0002k4-6b for qemu-devel@nongnu.org; Sat, 22 Feb 2014 04:00:03 -0500 Received: by mail-ee0-f49.google.com with SMTP id d17so2025764eek.22 for ; Sat, 22 Feb 2014 01:00:01 -0800 (PST) Sender: Paolo Bonzini Message-ID: <5308670E.7050301@redhat.com> Date: Sat, 22 Feb 2014 09:59:58 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <5306D74B.7070104@ddn.com> <15BFE5D4-F5BD-4C70-970F-7F94B2AF8360@alex.org.uk> <5307F614.3060204@ddn.com> In-Reply-To: <5307F614.3060204@ddn.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] CentOS 5.x intermittently fails to boot on QEMU 1.7.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Matt Lupfer , Alex Bligh Cc: QEMU Developers Il 22/02/2014 01:57, Matt Lupfer ha scritto: > Thanks for the response. The hpet_timer() callback calls timer_mod() > every 1 ms. That timerlist has no notify callback so it in turn calls > qemu_notify_event(). > > The guest kernel is only enabling the HPET timer and looking for > timer interrupts. FWIW, the HPET implementation is not very high precision (it has a large latency because it is implemented in userspace) and it is also very slow. I suggest running always with -no-hpet. Paolo