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Date: -- (:)
From: Jean Krivine <jean_krivine@h...>
Subject: Re: [Caml-list] memory usage
I'd be glad to try the patch if you could post it somewhere!

J

On Tue, Jul 15, 2008 at 3:31 PM, Andres Varon <avaron@gmail.com> wrote:
> Hello Jean,
>
> There is no 64-bit native OCaml compiler for Mac OS X intel.  I have a patch
> that works in Leopard, but did not compile opt.opt in Tiger, meaning that
> something is not OK,  so I did not offer it to the community. The bootstrap
> went fine, findlib and godi compiled OK too. I can post the patches
> somewhere if you want to give it a shot.
>
> My memory intensive application runs fine in Leopard with this compiler. But
> the binaries do not execute in Tiger (I found that other people had the same
> trouble copying a 64 bit apps from Leopard to Tiger and the other way
> around, but didn't look into it).
>
> If you want it ... I can post it, maybe someone can cleanup my job? All that
> would be needed after patching is:
>
> ./configure -host x86_64-apple-darwin -prefix /opt/ocaml/experimental
>
> (The prefix I always add for my ocaml-modified comilers).
>
> best,
>
> Andres
>
> On Jul 15, 2008, at 1:06 PM, Jean Krivine wrote:
>
>> Dear all
>>
>> I downloaded the last version of ocaml (3.10.2) but I must confess I
>> don't know what option I should pass to the compiler to make a binary
>> that uses 64 bits.
>> I tried naively ocamlopt -ccopt -arch -ccopt x86_64 but that doesn't
>> work. Any idea?
>>
>>
>>
>> On Fri, Jul 11, 2008 at 6:01 PM, Richard Jones <rich@annexia.org> wrote:
>>>
>>> On Fri, Jul 11, 2008 at 03:49:26PM -0400, Jean Krivine wrote:
>>>>
>>>> I am trying to run a stochastic simulator (written in ocaml) on a huge
>>>> data set and I have the following error message:
>>>
>>> I can confirm that OCaml works fine with huge datasets, on 64 bit
>>> platforms anyway.
>>>
>>>> sim(9595) malloc: *** mmap(size=1048576) failed (error code=12)
>>>> *** error: can't allocate region
>>>> *** set a breakpoint in malloc_error_break to debug
>>>> Fatal error: out of memory.
>>>>
>>>> My system:
>>>>
>>>> Mac Pro running OS X 10.5.4
>>>> Processor:  2 x 2.8 GHz Quad-Core Intel Xeon
>>>> Memory:  10 GB 800 MHz DDR2 FB-DIMM
>>>>
>>>> Does someone know what happened? Do you have any idea of any parameter
>>>> I could tune in order to avoid that?
>>>
>>> Is the compiler 32 bits or 64 bits on this machine?  Try doing:
>>>
>>> $ ocaml
>>> # Sys.word_size ;;
>>>
>>> It should print out either '32' or '64'.
>>>
>>> Also run your program under whatever the OS X equivalent of 'strace'
>>> is (ktrace?) to find out exactly why the mmap call fails.
>>>
>>> OCaml <= 3.10.2 on Linux suffers a nasty problem with its use of mmap
>>> and randomized address spaces
>>> (https://bugzilla.redhat.com/show_bug.cgi?id=445545#c9) but it doesn't
>>> seem like this is the same issue.
>>>
>>> Rich.
>>>
>>> --
>>> Richard Jones
>>> Red Hat
>>>
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>>
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>