Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754939AbXEHNPo (ORCPT ); Tue, 8 May 2007 09:15:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S966235AbXEHNPm (ORCPT ); Tue, 8 May 2007 09:15:42 -0400 Received: from mga02.intel.com ([134.134.136.20]:8745 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754246AbXEHNPl convert rfc822-to-8bit (ORCPT ); Tue, 8 May 2007 09:15:41 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.14,505,1170662400"; d="scan'208";a="240693492" X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-Class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Subject: RE: [PATCH] x86-64 highres/dyntick support Date: Tue, 8 May 2007 06:15:38 -0700 Message-ID: <653FFBB4508B9042B5D43DC9E18836F55DF147@scsmsx415.amr.corp.intel.com> In-Reply-To: <20070508095130.GY3505@sequoia.sous-sol.org> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [PATCH] x86-64 highres/dyntick support thread-index: AceRVnp9mgh9k/FsTDWjqUbumgbdAgAHFDxQ From: "Pallipadi, Venkatesh" To: "Chris Wright" , "Thomas Gleixner" CC: "LKML" , "john stultz" , "Ingo Molnar" , "Arjan van de Ven" , "Steven Rostedt" , "Andi Kleen" , "Andrew Morton" X-OriginalArrivalTime: 08 May 2007 13:15:38.0568 (UTC) FILETIME=[F88DA480:01C79172] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1408 Lines: 41 >-----Original Message----- >From: Chris Wright [mailto:chrisw@sous-sol.org] >Sent: Tuesday, May 08, 2007 2:52 AM >To: Thomas Gleixner >Cc: Chris Wright; LKML; Pallipadi, Venkatesh; john stultz; >Ingo Molnar; Arjan van de Ven; Steven Rostedt; Andi Kleen; >Andrew Morton >Subject: Re: [PATCH] x86-64 highres/dyntick support > >* Thomas Gleixner (tglx@linutronix.de) wrote: >> On Tue, 2007-05-08 at 02:39 -0700, Chris Wright wrote: >> >> > OK, looks very similar all things considered. One thing I >didn't do >> > was fix lapic timer calibration (was hoping you'd do that >part, and you >> > did ;-) I've noticed that something has changed and I'm >seeing irq0 >> > handled on cpu3 (4 cpu system), where it used to be on >cpu0 as expected. >> >> Strange, irq balancing ? > >That's what I was wondering, although i have same setup for 32-bit >and it behaves as expected with cpu0 taking hpet or pit on irq0 >and lapic timer picked up on the other 3 cpus. > Yes. Looks like irq balancing issue. On i386 I see irq has flag IRQF_NOBALANCING, but x86-64 does not have this flag. Can you add that and check whether that makes any difference. Thanks, Venki - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/