Open MPI logo

Open MPI Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Development mailing list

Subject: Re: [OMPI devel] memory manager RFC
From: Brian W. Barrett (brbarret_at_[hidden])
Date: 2008-06-04 17:21:43


On Wed, 4 Jun 2008, Paul H. Hargrove wrote:

> Brian states
>> This will allow users to turn ptmalloc2 support on/off at application
>> link time instead of MPI compile time.
>>
> Where I assume "MPI compile time" means when the MPI *implementation* is
> compiled.

Correct.

> So what about LD_PRELOAD? Can the user defer the decision to use
> ptmalloc until application launch?
> If so, this begs the question of an mpirun option to "enable
> leave_pinned, placing libompi-malloc.so in LD_PRELOAD if required".
> Can/will/should such an option exist?

Such an option can definitely exist. However, there's no way that I can
work on this, so it isn't going to happen any time soon.

Brian