Simon Marlow wrote:
On 13 June 2005 11:30, Gracjan Polak wrote:
My space problems continued... :)
Follow up :)
I have some ForeignPtr's, with finalizers (finalizerFree only). And I have lazyly produced list of those (yes, there is some unsafePerformIO magic behind, but I think I got this right). The problem is I get out-of-memory condition because elements get produced faster than those consumed are garbage collected.
Example:
list = ... mapM_ writeOut list
writeOut :: Ptr Word8 writeOut dat = do hPutBuh handle dat 1024 -- Control.Concurrent.threadDelay 1000
This sould be: writeOut :: Ptr Word8 writeOut dat = do hPutBuh handle dat 1024 System.Mem.performGC Control.Concurrent.threadDelay 1000 My small experimets show, that gc is not triggered?!?! What are the conditions to trigger gc? As I read the docs, is some % of heap. Is mallocForeinPtrBytes counted into that %? Anyway I ended up triggering GC by hand and giving it time to run finalizers. Frankly speaking this is nonsolution:( Related question: Documentation says: -Msize [Default: unlimited] Set the maximum heap size to size bytes. The heap normally grows and shrinks according to the memory requirements of the program... GHC 6.4 says: Heap exhausted; Current maximum heap size is 268435456 bytes (256 Mb); use `+RTS -M<size>' to increase it. What am I missing? PS: I might be mistaken in any of above statements. I'll be thankful for any light... :) -- Gracjan