From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263180AbVGABCA (ORCPT ); Thu, 30 Jun 2005 21:02:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263182AbVGABCA (ORCPT ); Thu, 30 Jun 2005 21:02:00 -0400 Received: from unused.mind.net ([69.9.134.98]:47582 "EHLO echo.lysdexia.org") by vger.kernel.org with ESMTP id S263180AbVGABB6 (ORCPT ); Thu, 30 Jun 2005 21:01:58 -0400 Date: Thu, 30 Jun 2005 18:00:40 -0700 (PDT) From: William Weston X-X-Sender: weston@echo.lysdexia.org cc: Karsten Wiese , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24 In-Reply-To: Message-ID: References: <200506281927.43959.annabellesgarden@yahoo.de> <200506301952.22022.annabellesgarden@yahoo.de> <20050630205029.GB1824@elte.hu> <200507010027.33079.annabellesgarden@yahoo.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 30 Jun 2005, William Weston wrote: > On Fri, 1 Jul 2005, Karsten Wiese wrote: > > --- linux-2.6.12-RT-50-35/arch/i386/kernel/mpparse.c 2005-06-30 16:38:00.000000000 +0200 > > +++ linux-2.6.12-RT/arch/i386/kernel/mpparse.c 2005-06-29 20:30:50.000000000 +0200 > > @@ -263,6 +263,7 @@ > > return; > > } > > mp_ioapics[nr_ioapics] = *m; > > + io_apic_base[nr_ioapics] = IO_APIC_BASE(nr_ioapics); > > nr_ioapics++; > > } > > > > @@ -914,6 +915,7 @@ > > mp_ioapics[idx].mpc_apicaddr = address; > > > > set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); > > + io_apic_base[idx] = IO_APIC_BASE(idx); > > mp_ioapics[idx].mpc_apicid = io_apic_get_unique_id(idx, id); > > mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx); > > Thanks, Karsten. This patch was needed to get my Xeon/HT (i865) to boot > -50-39. Next I'll see if IOAPIC_FAST will work. I'll keep you posted. After applying this patch to -50-39, IOAPIC_FAST now works on both the Xeon/HT and the non-HT Xeon boxes (i865 and i845 respectively). Wakeup latencies are looking better, especially on the Xeon/HT (max of 53us so far, as compared to 183us with -50-37 without IOAPIC_FAST). I'll test this out on the Athlon box (which hasn't done well with IOAPIC_FAST previously) when I get home. --ww