On Mon, 2009-10-26 at 16:21 -0400, Jeff Squyres wrote:
> there's a tiny/
> small amount of overhead inserted by OMPI telling Valgrind "this
> memory region is ok", but we live in an intensely competitive HPC
> environment.
I may be wrong but I seem to remember Julian saying the overhead is
twelve cycles for the valgrind calls. Of course calculating what to
pass to valgrind may add to this.
> The option to enable this Valgrind Goodness in OMPI is --with-
> valgrind. I *think* the option may be the same for libibverbs, but I
> don't remember offhand.
>
> That being said, I'm guessing that we still have bunches of other
> valgrind warnings that may be legitimate. We can always use some help
> to stamp out these warnings... :-)
I note there is a bug for this, being "Valgrind clean" is a very
desirable feature for any software and particularly a library IMHO.
https://svn.open-mpi.org/trac/ompi/ticket/1720
Ashley,
--
Ashley Pittman, Bath, UK.
Padb - A parallel job inspection tool for cluster computing
http://padb.pittman.org.uk
|
![[Flag]](../../../../../community/mirrors/flag-us.gif){kind=small}