On Jun 19, 2008, at 11:47 AM, Gabriele Fatigati wrote:
i didn't compile OpenMPI with bounds checking, but only my
application. Problems with OMPI compiled with bound checking remains.
Were you checking only with the OMPI 1.2 series? If so, is there a
chance you could test with the OMPI trunk? If we do have real bounds
issues, it would be good to get them cleared up.
2008/6/19 Jeff Squyres <jsquy...@cisco.com>:
On Jun 19, 2008, at 11:25 AM, Gabriele Fatigati wrote:
Hi Jeff,
i solved using Gigabit net and eth1 interface!
So, there are problems beetween Infiniband and gcc with bound
checking.
This is probably not too surprising -- the IB driver gives back
memory to the process that didn't come from malloc or other
traditional memory allocators, and this can confuse bounds checkers,
leading to false positives.
In the upcoming v1.3 series, we added a whole pile of stuff to
handle these kinds of false positives when running under valgrind.
Just curious -- does the gcc bounds checking stuff give you the
possibility of saying "this memory is ok"? (valgrind does; we use
it for IB-driver allocated or initialized memory)
--
Jeff Squyres
Cisco Systems
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Gabriele Fatigati
CINECA Systems & Tecnologies Department
Supercomputing Group
Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
www.cineca.it Tel: +39 051 6171722
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Jeff Squyres
Cisco Systems
