From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46592) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z5zc1-0007fm-5j for qemu-devel@nongnu.org; Fri, 19 Jun 2015 12:57:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Z5zbx-0005bs-SE for qemu-devel@nongnu.org; Fri, 19 Jun 2015 12:57:53 -0400 Received: from mail-wg0-x232.google.com ([2a00:1450:400c:c00::232]:35707) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z5zbx-0005bA-MH for qemu-devel@nongnu.org; Fri, 19 Jun 2015 12:57:49 -0400 Received: by wgbhy7 with SMTP id hy7so94495887wgb.2 for ; Fri, 19 Jun 2015 09:57:48 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <55844A0A.2070401@redhat.com> Date: Fri, 19 Jun 2015 18:57:46 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <557B0B21.2030009@hs-rm.de> In-Reply-To: <557B0B21.2030009@hs-rm.de> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] QEMU ARM SMP: IPI delivery delayed until next main loop event // how to improve IPI latency? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: =?UTF-8?B?QWxleCBaw7xwa2U=?= , qemu-devel@nongnu.org On 12/06/2015 18:38, Alex Züpke wrote: > CPU #0 CPU #1 > ====== ====== > ... other stuff ... WFI (wait for interrupt, like x86 "HLT") > send SGI in MPCore > polls for completeness >