From owner-freebsd-current@FreeBSD.ORG Thu May 5 20:04:42 2011 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 152F6106566B; Thu, 5 May 2011 20:04:42 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id DF5C58FC19; Thu, 5 May 2011 20:04:40 +0000 (UTC) Received: by fxm11 with SMTP id 11so2474348fxm.13 for ; Thu, 05 May 2011 13:04:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:sender:message-id:date:from:user-agent :mime-version:to:cc:subject:references:in-reply-to :x-enigmail-version:content-type:content-transfer-encoding; bh=A9jfSEzOir6DY2HnOzRZokNuel3gRlvftcefQsx4gn8=; b=LGOvip57uhMl1kUopw2Mk1BtBFUnFpzV9S27sc581Dp6vMrkRkY5pYjRyg2noOI2GP +4lelkZJ5StnnSZVHSIrCG0tsZwEzpFNGq51pVlXZux5lyjvdIhPIpEp6Vj642UJa71h VIHcD37/+grrWMSow7paJU9TojuIG01wCAnTc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:content-type :content-transfer-encoding; b=aynP5IxUlKRKwtTUB8hZFgc87hzI+oz0eVq8PKi0CovXXsX0RDQddSxDIOXwP4cvho lBU479rlHPsLduYciMgqYHqyfJaD3aB55SvJE1Rb6zo7yWmhUKDIvRUTAbFWcmNaZePy wqp9jTJFoq+jn2aY15zkyZhoXFOft6cK5UBX8= Received: by 10.223.85.195 with SMTP id p3mr222535fal.0.1304625879667; Thu, 05 May 2011 13:04:39 -0700 (PDT) Received: from mavbook2.mavhome.dp.ua (pc.mavhome.dp.ua [212.86.226.226]) by mx.google.com with ESMTPS id o17sm863540fal.1.2011.05.05.13.04.37 (version=SSLv3 cipher=OTHER); Thu, 05 May 2011 13:04:38 -0700 (PDT) Sender: Alexander Motin Message-ID: <4DC302B7.7090007@FreeBSD.org> Date: Thu, 05 May 2011 23:04:07 +0300 From: Alexander Motin User-Agent: Thunderbird 2.0.0.23 (X11/20091212) MIME-Version: 1.0 To: Julian Elischer References: <4DB620CB.50302@FreeBSD.org> <20110426103741.GA25031@freebsd.org> <4DB8AA4B.1070502@FreeBSD.org> <4DB8F833.7090604@FreeBSD.org> <4DB92143.5010108@freebsd.org> <4DB92215.2060501@FreeBSD.org> In-Reply-To: <4DB92215.2060501@FreeBSD.org> X-Enigmail-Version: 0.96.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Alexander Best , Doug Barton , current@freebsd.org, Steve Wills Subject: Re: responsiveness during IO tasks X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 May 2011 20:04:42 -0000 Alexander Motin wrote: > Julian Elischer wrote: >>> Doug Barton wrote: >>> No problem, just let's hunt things down. I'll wait for that larger post. >>> In meantime, if it is related to eventtimers, it would be good to >>> collect more detailed information. You could try to make timer run >>> during idle (kern.eventtimer.idletick). You could try to switch timer >>> from one-shot to periodic mode (kern.eventtimer.periodic). You could >>> also try to switch to another timer (kern.eventtimer.timer). >> kern.eventtimer.periodic needs to be disabled to run 9.x on xen >> (as of a few months ago) > > Yes, but it needs to be enabled (it is disabled by default). I remember > about it and going to experiment with it nearest time. Problem with Xen HVM freeze in one-shot mode workarounded by r221508. Also, looking on Xen 4.1 sources, seems like problem was already fixed from their side also. -- Alexander Motin