On 20.08.12 10:32, Doug Barton wrote: > On 08/15/2012 03:18, Alexander Motin wrote: >> >> It is quite pointless to speculate without real info like mentioned >> above KTR_SCHED traces. > > I'm sorry, you're quite wrong about that. In the cases I mentioned, and > in about 2 out of 3 of the cases where users reported problems and I > suggested that they try 4BSD, the results were clear. This obviously > points out that there is a serious problem with ULE, and if I were the > one who was responsible for that code I would be looking at ways of > helping users figure out where the problems are. But that's just me. > >> Main thing I've learned about schedulers, things >> there never work as you expect. There are two many factors are relations >> to predict behavior in every case. > > In the web hosting case that I mentioned, I purposely kept every other > factor consistent; and changed only s/ULE/4BSD/. The results were both > clear and consistent. >
Can you please prove that with some actual numbers? I seem to recall you posted something not too long ago but i was unable to find that right now. Also can you tell us what you ran and how. I would really like to reproduce this. Thanks, Florian
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