From owner-freebsd-stable@FreeBSD.ORG Thu Jan 19 20:23:58 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0B893106564A; Thu, 19 Jan 2012 20:23:58 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-ey0-f182.google.com (mail-ey0-f182.google.com [209.85.215.182]) by mx1.freebsd.org (Postfix) with ESMTP id 6AE668FC12; Thu, 19 Jan 2012 20:23:56 +0000 (UTC) Received: by eaai10 with SMTP id i10so138964eaa.13 for ; Thu, 19 Jan 2012 12:23:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=YZuuYPgIXeXgRgIU9b8mXgZG1//88kEuTIrSXgcXPxE=; b=Phus3bn92nwSwJfKP2k/n6ES33SNRLSnwmKAoDtOJqvlSXzbIaXA6lVvnKOln7eBB6 xm0rWwMFnMi5L9OockVGvcUFLuYOC9PH7K07B7KbpLuukZhhNT5t1oj1U2J/r8wj15eS oBsvl+Cj8EIoVopQlfKaxl5py/KqBCn+7Msiw= Received: by 10.213.16.83 with SMTP id n19mr6223256eba.137.1327004636182; Thu, 19 Jan 2012 12:23:56 -0800 (PST) Received: from mavbook2.mavhome.dp.ua (pc.mavhome.dp.ua. [212.86.226.226]) by mx.google.com with ESMTPS id n17sm2047493eei.3.2012.01.19.12.23.54 (version=SSLv3 cipher=OTHER); Thu, 19 Jan 2012 12:23:55 -0800 (PST) Sender: Alexander Motin Message-ID: <4F187BD9.9010200@FreeBSD.org> Date: Thu, 19 Jan 2012 22:23:53 +0200 From: Alexander Motin User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:9.0) Gecko/20111227 Thunderbird/9.0 MIME-Version: 1.0 To: Andriy Gapon References: <4F181FE7.30904@karolyi.hu> <4F18506C.4050604@FreeBSD.org> <4F187706.90201@FreeBSD.org> In-Reply-To: <4F187706.90201@FreeBSD.org> Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 8bit Cc: =?ISO-8859-2?Q?L=E1szl=F3_K=E1rolyi?= , freebsd-stable@FreeBSD.org Subject: Re: Strange 'hangs' with RELENG_9 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Jan 2012 20:23:58 -0000 On 01/19/12 22:03, Andriy Gapon wrote: > on 19/01/2012 21:24 László Károlyi said the following: >> On 2012.01.19., at 18:18, Andriy Gapon wrote: >> >>> Please provide output of the following sysctls: >>> sysctl kern.eventtimer >>> sysctl kern.timecounter >> >> >> [root@sys ~]# sysctl kern.eventtimer >> kern.eventtimer.choice: HPET(450) HPET1(450) HPET2(450) LAPIC(400) i8254(100) RTC(0) >> kern.eventtimer.et.LAPIC.flags: 15 >> kern.eventtimer.et.LAPIC.frequency: 0 >> kern.eventtimer.et.LAPIC.quality: 400 >> kern.eventtimer.et.i8254.flags: 1 >> kern.eventtimer.et.i8254.frequency: 1193182 >> kern.eventtimer.et.i8254.quality: 100 >> kern.eventtimer.et.HPET.flags: 3 >> kern.eventtimer.et.HPET.frequency: 14318180 >> kern.eventtimer.et.HPET.quality: 450 >> kern.eventtimer.et.HPET1.flags: 3 >> kern.eventtimer.et.HPET1.frequency: 14318180 >> kern.eventtimer.et.HPET1.quality: 450 >> kern.eventtimer.et.HPET2.flags: 3 >> kern.eventtimer.et.HPET2.frequency: 14318180 >> kern.eventtimer.et.HPET2.quality: 450 >> kern.eventtimer.et.RTC.flags: 17 >> kern.eventtimer.et.RTC.frequency: 32768 >> kern.eventtimer.et.RTC.quality: 0 >> kern.eventtimer.periodic: 0 >> kern.eventtimer.timer: HPET >> kern.eventtimer.idletick: 0 >> kern.eventtimer.singlemul: 2 >> [root@sys ~]# sysctl kern.timecounter >> kern.timecounter.tick: 1 >> kern.timecounter.choice: TSC-low(800) HPET(950) i8254(0) ACPI-fast(900) dummy(-1000000) >> kern.timecounter.hardware: HPET >> kern.timecounter.stepwarnings: 0 >> kern.timecounter.tc.ACPI-fast.mask: 4294967295 >> kern.timecounter.tc.ACPI-fast.counter: 3649705857 >> kern.timecounter.tc.ACPI-fast.frequency: 3579545 >> kern.timecounter.tc.ACPI-fast.quality: 900 >> kern.timecounter.tc.i8254.mask: 65535 >> kern.timecounter.tc.i8254.counter: 27536 >> kern.timecounter.tc.i8254.frequency: 1193182 >> kern.timecounter.tc.i8254.quality: 0 >> kern.timecounter.tc.HPET.mask: 4294967295 >> kern.timecounter.tc.HPET.counter: 1224089625 >> kern.timecounter.tc.HPET.frequency: 14318180 >> kern.timecounter.tc.HPET.quality: 950 >> kern.timecounter.tc.TSC-low.mask: 4294967295 >> kern.timecounter.tc.TSC-low.counter: 1655163352 >> kern.timecounter.tc.TSC-low.frequency: 11772185 >> kern.timecounter.tc.TSC-low.quality: 800 >> kern.timecounter.smp_tsc: 1 >> kern.timecounter.invariant_tsc: 1 > > I wonder whether there could be an interference between HPET being used as > timecounter and HPET being used as an event timer. > Alexander, what do you think? I don't expect interference between them. HPET timecounter just reads same hardware counter that is also read by comparators for eventtimer interrupts generation. Theoretically they could interfere if that timer was stopped during comparators programming, but it is not. > László, can you please try changing kern.timecounter.hardware to TSC-low or > ACPI-fast? -- Alexander Motin