Re: [Caml-list] memory usage

["Jean Krivine" <jean_krivine@hms.harvard.edu>]

Good news, I just tested the patch and it works great with my application!
I just had to modify the module random since a call to (Random.int
max_int) may raise and exception (it is made for 32 bits integers).
So I guess that modification should be included in the patch.

Thanks a lot Andres.
Jean

On Wed, Jul 16, 2008 at 12:27 PM, Jean Krivine
<jean_krivine@hms.harvard.edu> wrote:
> Great thanks!
>
> J
>
> On Wed, Jul 16, 2008 at 10:16 AM, Andres Varon <avaron@gmail.com> wrote:
>>
>> 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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>>
>