Fernando Perez wrote: > Madhusudan Singh wrote: > >> Madhusudan Singh wrote: >> >>> Hi >>> >>> I am using time.clock() to get the current time of the processor in >>> seconds. For my application, I need really high resolution but currently >>> seem to be limited to 0.01 second. Is there a way to specify the >>> resolution (say 1-10 microseconds) ? My processor is a 1.4 MHz Intel >>> processor. Surely, it should be able to report times a few (or at least >>> 10) microseconds apart. >>> >>> Thanks. >> >> Correcting a typo (1.4GHz, not 1.4 MHz). >> >> And I am using Linux. > > Then, this may be handy to give you an idea of the resolution you can > expect at > the python level (i.e., without writing extension code). Feel free to add > fancier statistics if you actually need them: > > planck[python]> cat tdelta.py > #!/usr/bin/env python > """quick and dirty test for time deltas. Under Linux, this is best done > using time.time() instead of time.clock()""" > > import commands > from time import time > > npts = 50 > times = [-(time()-time()) for i in xrange(npts)] > > print commands.getoutput('egrep "MHz|model name" /proc/cpuinfo') > print 'Min. time delta :',min(times),'s' > print 'Max. time delta :',max(times),'s' > print 'Avg. time delta :',sum(times)/float(npts),'s' > print 'Num. of timings :',npts > > # > For example, on my system: > > planck[python]> ./tdelta.py > model name : Intel(R) Pentium(R) 4 CPU 2.80GHz > cpu MHz : 2794.365 > Min. time delta : 2.86102294922e-06 s > Max. time delta : 9.05990600586e-06 s > Avg. time delta : 3.38554382324e-06 s > Num. of timings : 50 > > Cheers, > > f
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