On 07/05/2012 14:33, Jurriaan Hage wrote:
LS.
I have a very memory intensive application. It seems that the timing of my
application
depend very much on the precise setting of -H...M in the runtime system (-H2000M
seems to work best, computation time becomes a third of what I get when I pass
no
-H option). I conjecture that this good behaviour is the result of gc
happening at the right time.
So I wondered: if I can one when is the right time, is it possible then to
trigger
GC explicitly from within the Haskell code?
It is more likely that you are trading extra memory for better
performance, rather than triggering the GC at a good time. GC is
basically a space/time tradeoff, see:
http://stackoverflow.com/questions/3171922/ghcs-rts-options-for-garbage-collection/3172704#3172704
If you think the program has points where residency is very low and it
would be good to trigger a GC, I would first confirm the hypothesis by
doing a heap profile. GC can be triggered with System.Mem.performGC.
Cheers,
Simon
_______________________________________________
Glasgow-haskell-users mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
