From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37700) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn1Ta-00089D-Eu for qemu-devel@nongnu.org; Tue, 28 Apr 2015 05:06:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Yn1TX-00070d-79 for qemu-devel@nongnu.org; Tue, 28 Apr 2015 05:06:46 -0400 Received: from mail-wi0-x230.google.com ([2a00:1450:400c:c05::230]:34246) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn1TX-00070W-1C for qemu-devel@nongnu.org; Tue, 28 Apr 2015 05:06:43 -0400 Received: by wicmx19 with SMTP id mx19so102928678wic.1 for ; Tue, 28 Apr 2015 02:06:42 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <553F4D9D.4040901@redhat.com> Date: Tue, 28 Apr 2015 11:06:37 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1421428797-23697-1-git-send-email-fred.konrad@greensocs.com> <87wq22bvmd.fsf@linaro.org> <551532CF.600@greensocs.com> <0ACA9B57-1DC6-4C75-8FA4-DEAA701B1E94@greensocs.com> <5527F444.7060808@greensocs.com> <55379366.9070304@greensocs.com> <20150427170655.GA32698@flamenco> In-Reply-To: <20150427170655.GA32698@flamenco> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [RFC 00/10] MultiThread TCG. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Emilio G. Cota" , Frederic Konrad Cc: mttcg@greensocs.com, Peter Maydell , Jan Kiszka , Mark Burton , Alexander Graf , QEMU Developers , =?windows-1252?Q?Alex_Benn=E9e?= On 27/04/2015 19:06, Emilio G. Cota wrote: > Note that I'm running with -smp 1. My guess is that the iothread > is starved, since patch 472f4003 "Drop global lock during TCG code execution" > removes from the iothread the ability to kick CPU threads. In theory that shouldn't be necessary anymore. The CPU thread should only hold the global lock for very small periods of time, similar to KVM. Can you post a backtrace? Paolo