Date: Wed, 17 Jul 2002 13:25:52 -0700 From: Darren Pilgrim <dmp@pantherdragon.org> To: Andrei Cojocaru <spinlock_lists@empirequest.com> Cc: Cy Schubert - CITS Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>, freebsd-hackers@FreeBSD.ORG Subject: Re: Counting the clock cycles Message-ID: <3D35D2D0.F480C81D@pantherdragon.org> References: <200207171943.g6HJhf4o051526@cwsys.cwsent.com> <004801c22dce$859bfa60$0300a8c0@fivehundred>
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Andrei Cojocaru wrote: > > doesn't fit my criteria since it changes, bah I'll just use > gettimeofday since it's a portable API and hope the computers I run > it on don't change their blocks by too much... If you're really worried about it, get a GPS device that can provide you with a PPS signal for use with ntpd. Then I'd say you could safely rely on the computer's clock being accurate. > From: "Cy Schubert - CITS Open Systems Group" <Cy.Schubert@uumail.gov.bc.ca> > > In message <00d501c22dc4$57d08b00$0200a8c0@twothousand>, "Andrei > > Cojocaru" writes: > > > I was asking around in #freebsdhelp on EFNet what the equivalent of > > > GetTickCount() in the Win32 API is in FreeBSD. > > > > > > I need a way to properly determine passage of time that is not affected if I > > > change the system clock for example. The only way I'm aware that you can do > > > that is by counting the number of clock cycles since system startup. What > > > function does that in FreeBSD? I'd also like a Linux way if possible. (that > > > is a way that will work across all UNIX clones). Thanks and please include > > > my email in the reply directly since I'm not signed up to this mailing list. > > > Thanks once again. > > > > How about time(3)? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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