On Jul 25, 2004, at 1:30 PM, Jay A. Kreibich wrote: On Sun, Jul 25, 2004 at 10:32:24PM +1000, Paul Ripke scratched on the wall: On Sunday, Jul 25, 2004, at 00:08 Australia/Sydney, Lalit Chandivade wrote: Hi As per the following discussion http://lists.apple.com/archives/darwin-kernel/2004/Mar/31/ gettingsystemperfo rmance.001.txt clock_get_uptime gives system up time in CPU cycles. Is there a way in kernel or IOKit to know the CPU cycles per second? A little digging through xnu source should show where this is coming from: pbg3:ksh$ sysctl hw.cpufrequency hw.cpufrequency = 300000000 Are there any known problems with this call? On my 800MHz TiBook, it always returns "hw.cpufrequency: 667000000". And, yes, it is really an 800MHz TiBook. At least that's what the box said (and what the bill said!). System Profiler also says 800MHz. But sysctl always says 667MHz. What is your energy save setting for CPU clock speed cycling? -Shawn _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.