From owner-freebsd-stable@FreeBSD.ORG Sat Jun 12 00:00:54 2010 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 9C858106564A for ; Sat, 12 Jun 2010 00:00:54 +0000 (UTC) (envelope-from jeff.dowsley@mac.com) Received: from asmtpout021.mac.com (asmtpout021.mac.com [17.148.16.96]) by mx1.freebsd.org (Postfix) with ESMTP id 7DBC28FC15 for ; Sat, 12 Jun 2010 00:00:54 +0000 (UTC) MIME-version: 1.0 Received: from [192.168.1.101] (110-175-193-74.static.tpgi.com.au [110.175.193.74]) by asmtp021.mac.com (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTPSA id <0L3V00H3VK1E9N70@asmtp021.mac.com> for freebsd-stable@freebsd.org; Fri, 11 Jun 2010 17:00:54 -0700 (PDT) X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1004200000 definitions=main-1006110172 X-Proofpoint-Virus-Version: vendor=fsecure engine=1.12.8161:2.4.5,1.2.40,4.0.166 definitions=2010-06-11_03:2010-02-06, 2010-06-11, 2010-06-11 signatures=0 In-reply-to: References: <20100610230300.GA51804@stack.nl> Message-id: <53C5B962-676B-4787-9C84-49F70884A3A1@mac.com> From: Jeff Dowsley Date: Sat, 12 Jun 2010 10:01:08 +1000 To: freebsd-stable@freebsd.org X-Mailer: Apple Mail (2.753.1) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Content-Transfer-Encoding: 7BIT X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Re: "calcru: runtime went backwards" messages 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: Sat, 12 Jun 2010 00:00:54 -0000 You're not alone. Noticed the calcru messages after a rebuild in May on a Compaq PIII, but assumed it wasn't doing any harm, and that it would eventually be fixed. JeffD _____________________________ M 0427565791 jeff.dowsley@mac.com On 11/06/2010, at 4:03 PM, Jansen Gotis wrote: > On Fri, Jun 11, 2010 at 7:03 AM, Jilles Tjoelker > wrote: >> On Fri, Jun 11, 2010 at 12:35:05AM +0800, Jansen Gotis wrote: >>> Hi, for the past couple of months since moving to RELENG_8 I've been >>> receiving "calcru: runtime went backwards" messages on the console. >> > >> >> This may well be a manifestation of a brokenness (which should not be >> unknown) in how FreeBSD stores CPU time utilization. The time is >> maintained in "CPU ticks" (CPU clock cycles), so if the clock >> frequency >> changes, the values of existing processes will be wrong (a jump when >> converted to seconds). When calcru detects this, it generates >> messages >> like the above. If this analysis is right, the messages can be >> ignored, >> but indicate that CPU time statistics may be inaccurate. >> > > You're probably right, the messages can be ignored. I don't see any > issues > other than the messages being printed on the console; I don't > experience > freezing, etc. It just struck me as weird because searching the - > current and > -stable mailing lists does not show anyone else having the issue as > recently > as I have. > > Just some more info to add which I forgot about last time...setting > kern.hz to > 100 did not help. > > Thanks for the reply. > > > Best regards, > Jansen > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable- > unsubscribe@freebsd.org"