Date: Sat, 22 Feb 2014 18:16:03 +0100 From: Matthias Apitz <guru@unixarea.de> To: Kostas Oikonomou <k.oikonomou@att.net> Cc: freebsd-questions@freebsd.org Subject: Re: slowdown because of gettimeofday change between 9.2 and 10? Message-ID: <20140222171602.GA2265@La-Habana> In-Reply-To: <5308D37B.50908@att.net> References: <5307E64C.3040108@att.net> <5308D37B.50908@att.net>
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El día Saturday, February 22, 2014 a las 11:42:35AM -0500, Kostas Oikonomou escribió: > I did some more work on this. Here is some additional info: > > 1) The ntpdate suggestion doesn't seem to work. (By the way, the ntpd > man page says that it's equivalent to running ntpd with the "-q" option). I could not imagine that the local time, correct or not, triggers this. > > The reason is that in my case the problem doesn't occur just at start > up. The calls to gettimeofday go on all the time. > I even killed the ntpd daemon, and the calls still went on. > > 2) I checked on another system which runs the same application, but > under 9.2. It turns out that the application issues the same calls to > gettimeofday, also on a continuous basis, and, furthermore the numbers > of calls on the two systems over a period of 15 seconds are almost the same. > > So there must be some other difference between 9.2 and 10.0 that causes > the slowdown. In my case it is: $ uname -a FreeBSD La-Habana 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r250588M: Sat Jun 22 14:15:48 CEST 2013 guru@La-Habana:/usr/obj/usr/home/guru/head/src/sys/GENERIC i386 The app in question (kabc) was compiled based on the ports at this time. HIH matthias -- Matthias Apitz | /"\ ASCII Ribbon Campaign: www.asciiribbon.org E-mail: guru@unixarea.de | \ / - No HTML/RTF in E-mail WWW: http://www.unixarea.de/ | X - No proprietary attachments phone: +49-170-4527211 | / \ - Respect for open standards
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