Re: gettimeofday cost on intel?
site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com On May 9, 2006, at 9:32 AM, Andrew Gallatin wrote: On May 9, 2006, at 8:11 AM, Andrew Gallatin wrote: I did not know about this. Nm reveals its symbol in libc (at least on ppc). Is it documented somewhere? Does it also use the commpage? Yes, it uses the commpage. Here's a technote on its usage: http://developer.apple.com/qa/qa2004/qa1398.html matt. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Matt Watson writes: I need a cheap way to measure events with at least a 10ms granularity that is monotonically increasing, regardless of the CPU my thread has been scheduled upon. I'd be surprised if mach_absolute_time() does not work for this. If you don't need the conversion to nanoseconds, you can just use the raw function. This email sent to site_archiver@lists.apple.com
participants (1)
-
Matt Watson