Date: Wed, 17 Jul 2002 12:19:48 -0700 From: Alfred Perlstein <bright@mu.org> To: Andrei Cojocaru <spinlock_lists@empirequest.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Counting the clock cycles Message-ID: <20020717191948.GE77219@elvis.mu.org> In-Reply-To: <00d501c22dc4$57d08b00$0200a8c0@twothousand> References: <00d501c22dc4$57d08b00$0200a8c0@twothousand>
next in thread | previous in thread | raw e-mail | index | archive | help
* Andrei Cojocaru <spinlock_lists@empirequest.com> [020717 12:02] wrote: > 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. I don't see a platform independant way of doing this, sorry. Have a look at the source for w(1). http://www.freebsd.org/cgi/cvsweb.cgi/src/usr.bin/w/w.c Look at the function pr_header(), it uses SYSCTL to grab system uptime. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' Tax deductible donations for FreeBSD: http://www.freebsdfoundation.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020717191948.GE77219>