[Haskell-cafe] Real-time garbage collection for Haskell

[Neil Davies]

My experience agrees with Pavel.

I've never observed ones that size. I have an application that runs in  
'rate equivalent real-time' (i.e. there may be some jitter in the  
exact time of events but it does not accumulate). It does have some  
visibility of likely time of future events and uses that to perform  
some speculative garbage collection. GC is pretty short and i've not  
seen an effect > 1ms in those runs (all the usual caveats apply - my  
programs are not your programs etc).


Neil

On 28 Feb 2010, at 09:06, Pavel Perikov wrote:

> Did you really seen 100ms pauses?! I never did extensive research on  
> this but my numbers are rather in microseconds range (below 1ms).  
> What causes such a long garbage collection? Lots of allocated and  
> long-living objects?
>
> Pavel.
>
> On 28.02.2010, at 8:20, Luke Palmer wrote:
>
>> I have seen some proposals around here for SoC projects and other
>> things to try to improve the latency of GHC's garbage collector.  I'm
>> currently developing a game in Haskell, and even 100ms pauses are
>> unacceptable for a real-time game.  I'm calling out to people who  
>> have
>> seen or made such proposals, because I would be willing to contribute
>> funding and/or mentor a project that would contribute to this goal.
>> Also any ideas for reducing this latency in other ways would be very
>> appreciated.
>>
>> Thanks,
>> Luke
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