From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933615Ab2LGLeE (ORCPT ); Fri, 7 Dec 2012 06:34:04 -0500 Received: from smtp1-g21.free.fr ([212.27.42.1]:36110 "EHLO smtp1-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932274Ab2LGLeC (ORCPT ); Fri, 7 Dec 2012 06:34:02 -0500 Message-ID: <50C1D423.6000400@free.fr> Date: Fri, 07 Dec 2012 12:33:55 +0100 From: Daniel Lezcano User-Agent: Mozilla/5.0 (X11; Linux i686; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: Linux Kernel Mailing List Subject: local timers vs APIC question Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi All, I have a question about the timers on the intel platform. While looking at the /proc/interrupts on different hosts, I see for an intel i7 or intel Xeon 5345, the IO-APIC-edge timer is rarely used and the local timers are widely used but on Core 2 Duo T9500, the APIC timer is more used than the local timers. Why there is such difference ? Does anyone have a hint to investigate why that happens ? Thanks in advance -- Daniel