On Sun, May 07, 2006 at 11:27:22PM +0300, Sven Petai wrote: > On Sunday 07 May 2006 22:16, you wrote: > > On Sun, May 07, 2006 at 10:00:41PM +0300, Sven Petai wrote: > > > The results in my mail were mean values over 2 runs, > > > only once did I see really huge (more than 10%) differences between > > > several subsequent runs with same settings, this case was clearly > > > mentioned in the results. > > > > FYI, 2 is not really enough, you should do at least 10 repetitions of > > each test to reduce variance (which can be a lot, despite what you > > saw!) and so that differences between them can be accurately > > estimated. Ministat is really helpful for this. > > > > I'm well aware that 2 is not enough for quality measurements and > I certainly would have liked to do more repetitions, but I was running against > a clock - this machine might be shipped out to client any > time and I wanted to test several combinations of OS [fbsd 6, fbsd current, > current + watsons patch, linux] with different threading library and > scheduler combinations at different thread counts and nice values. > This creates nice combinatorial explosion. FYI, ULE is probably not worth bothering about. It has too many performance problems and no owner. Kris
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