The carbonbased lifeform Nick Craig-Wood inspired comp.lang.python with: > Theo v. Werkhoven <[EMAIL PROTECTED]> wrote: >> Output: >> Sample 1, at 0.0 seconds from start; Output power is: 8.967 dBm > [snip] >> Sample 17, at 105.7 seconds from start; Output power is: 9.147 dBm >> Sample 18, at 112.4 seconds from start; Output power is: 9.284 dBm >> Sample 19, at 119.0 seconds from start; Output power is: 9.013 dBm >> Sample 20, at 125.6 seconds from start; Output power is: 8.952 dBm >> Sample 21, at 91852.8 seconds from start; Output power is: 9.102 dBm >> Sample 22, at 91862.7 seconds from start; Output power is: 9.289 dBm >> Sample 23, at 145.4 seconds from start; Output power is: 9.245 dBm >> Sample 24, at 152.0 seconds from start; Output power is: 8.936 dBm > [snip] >> But look at the timestamps of samples 21, 22 and 43. >> What is causing this? >> I've replaced the time.clock() with time.time(), and that seems to >> solve the problem, but I would like to know if it's something I >> misunderstand or if it's a problem with the platform (Windows Server >> 2003) or the time.clock() function. > > time.clock() uses QueryPerformanceCounter under windows. There are > some known problems with that (eg with Dual core AMD processors). > > See http://msdn.microsoft.com/en-us/library/ms644904.aspx > > And in particular > > On a multiprocessor computer, it should not matter which processor > is called. However, you can get different results on different > processors due to bugs in the basic input/output system (BIOS) or > the hardware abstraction layer (HAL). To specify processor > affinity for a thread, use the SetThreadAffinityMask function.
Alright, that explains that then. > I would have said time.time is what you want to use anyway though > because under unix time.clock() returns the elapsed CPU time which is > not what you want at all! You're right, using fuctions that do not work cross platform isn't smart. Cheers for the explanation Nick Theo -- theo at van-werkhoven.nl ICQ:277217131 SuSE Linux linuxcounter.org: 99872 Jabber:muadib at jabber.xs4all.nl AMD XP3000+ 1024MB "ik _heb_ niets tegen Microsoft, ik heb iets tegen de uitwassen *van* Microsoft" -- http://mail.python.org/mailman/listinfo/python-list