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Date: -- (:)
From: Andres Varon <avaron@g...>
Subject: Re: [Caml-list] memory usage

On Jul 15, 2008, at 3:38 PM, Jean Krivine wrote:

> I'd be glad to try the patch if you could post it somewhere!

I have posted it in:

http://research.amnh.org/~avaron/ocaml/

best,

Andres
>
> 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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>>
>>