[Haskell-cafe] Re: Joels Time Leak
bulatz at HotPOP.com
Thu Jan 5 18:49:11 EST 2006
Thursday, January 05, 2006, 3:40:27 PM, you wrote:
>>>>SM> Sure, there's no reason why we couldn't do this. Of course, even
>>>>SM> idle Haskell processes will be ticking away in the background, so
>>>>SM> there's a reason not to make the interval too short. What do
>>>>SM> you think is reasonable?
SM> It will have an impact, because the tick signal has to be delivered to
SM> the process and the signal handler run.
you are saying about C callback which would be called by OS to count
SM> The impact on CPU time is
SM> small, but could be noticeable if we were to choose too small an
SM> interval. Furthermore, the ticker prevents idle Haskell processes from
SM> being completely swapped out (that problem already exists).
having ticks of 0.02 sec or 0.000002 sec doesn't change anything for
i think that reasonable tick would be in range of 10-100 microseconds,
so what program with 10k threads (reasonable maximum with current
technologies state) can give slice to each thread in 0.1-1 seconds
Bulat mailto:bulatz at HotPOP.com
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