Is there any way to get a high resolution system uptime in nanoseconds or in number of CPU cycles? Also, I am interested in gathering CPU utilization statistics and number of interrupts during I/O. Is there any method of doing this? Can the PMC registers be used? If so, is there any documentation on how to program the MMCR registers? Should one use the processor_control() method (mach/processor.h, mach/ppc/processor_info.h) to do this? Thanks Yahoo! Finance Tax Center - File online. File on time. _______________________________________________ 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.