What do GHC's garbage collector options -A and -H mean?
I've read on the GHC's documentation and in this answer about the -A
and -H options. The first one sets a fixed size for the "allocation area" (or the generation 0 of the garbage collector). The second sets a lower bound on the heap size. If I understand well how generational garbage collection works, objects are allocated on generation 0, and when this one is full, those that are still needed are copied to generation 1 and the others are deallocated. My question is how are "allocation area", generation 0, generation 1, and heap size related? Is it like this:
- allocation area = generation 0,
- generation 0 + generation 1 (+ eventually more generations) = heap size?
Then, does -A controls the size of the first one whereas -H sets a lower bound on the size of the whole?
haskell ghc
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
add a comment |
I've read on the GHC's documentation and in this answer about the -A
and -H options. The first one sets a fixed size for the "allocation area" (or the generation 0 of the garbage collector). The second sets a lower bound on the heap size. If I understand well how generational garbage collection works, objects are allocated on generation 0, and when this one is full, those that are still needed are copied to generation 1 and the others are deallocated. My question is how are "allocation area", generation 0, generation 1, and heap size related? Is it like this:
- allocation area = generation 0,
- generation 0 + generation 1 (+ eventually more generations) = heap size?
Then, does -A controls the size of the first one whereas -H sets a lower bound on the size of the whole?
haskell ghc
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
add a comment |
I've read on the GHC's documentation and in this answer about the -A
and -H options. The first one sets a fixed size for the "allocation area" (or the generation 0 of the garbage collector). The second sets a lower bound on the heap size. If I understand well how generational garbage collection works, objects are allocated on generation 0, and when this one is full, those that are still needed are copied to generation 1 and the others are deallocated. My question is how are "allocation area", generation 0, generation 1, and heap size related? Is it like this:
- allocation area = generation 0,
- generation 0 + generation 1 (+ eventually more generations) = heap size?
Then, does -A controls the size of the first one whereas -H sets a lower bound on the size of the whole?
haskell ghc
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
I've read on the GHC's documentation and in this answer about the -A
and -H options. The first one sets a fixed size for the "allocation area" (or the generation 0 of the garbage collector). The second sets a lower bound on the heap size. If I understand well how generational garbage collection works, objects are allocated on generation 0, and when this one is full, those that are still needed are copied to generation 1 and the others are deallocated. My question is how are "allocation area", generation 0, generation 1, and heap size related? Is it like this:
- allocation area = generation 0,
- generation 0 + generation 1 (+ eventually more generations) = heap size?
Then, does -A controls the size of the first one whereas -H sets a lower bound on the size of the whole?
haskell ghc
haskell ghc
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
edited Nov 21 '18 at 14:11
Guillaume Chérel
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
asked Nov 19 '18 at 15:30
Guillaume ChérelGuillaume Chérel
712413
712413
add a comment |
add a comment |
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