Re: [Caml-list] Re: Mastering the garbage collector

[Christophe Raffalli <Christophe.Raffalli@univ-savoie.fr>]

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Tiphaine Turpin a écrit :
> Sylvain Le Gall a écrit :
>   
>> You need to do a "Gc.compact" to size down. A full_major will collect but I
>> am not sure it will free allocated page.
>>   
>>     
> But if it is just a matter of compaction, then
>
> (Gc.stat ()).Gc.live_words
>
> should give me a correct (small) result, no ?
>
> Tiphaine
>
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>   
You need to make sure that a complete GC cycle has run after producing
your result, before

(Gc.stat ()).Gc.live_words gives you what you want.

The function you need is that one :

val full_major : unit -> unit

Do a minor collection, finish the current major collection cycle, and perform a complete new cycle. This 
will collect all currently unreachable blocks.

You should make sure that variables with values holding large objects
are not syntactically in the scope of any piece of code that can still
be evaluated (I am not sure I am very clear). Here is a small example :


let x = ... in
(* here you are not sure x is collected even if the variable does not
appear after this comment *)
let y = 3 in
...


Cheers,
Christophe

-- 
Christophe Raffalli
Universite de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex

tel: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
mail: Christophe.Raffalli@univ-savoie.fr
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