úÎÿê%(c) 2006-2007,2010 Martin GrabmuellerGPLmartin@grabmueller.de provisional0non-portable (requires IA-32 processor and GHC)None ÓReturn the number of clock cycles since the machine this function is called on has been powered up. Note that the value returned may be inaccurate if the program is run on some hardware virtualization layer.tEspecially on multi-core processors and when using hibernating operating systems, the values returned may be bogus.For more information about the rdtsc instruction, see "http://en.wikipedia.org/wiki/RDTSC rdtsc-1.3.0.1System.CPUTime.Rdtscrdtsc