Ok, thanks a lot, as soon as possibile, i''install 1.3 version. But i don't understand why MPI_Recv warnings are detected. Which is the difference with MPI_Send warnings? Modules involved in OpenMPI are differents?
2008/12/15 Tim Mattox <timat...@open-mpi.org>: > Gabriele, > You should switch the the upcoming v1.3 release as soon as you can, > via either the v1.3rc2 tarball or one of the v1.3rc3 nightly tarballs, > available here: http://www.open-mpi.org/nightly/ > We are very close to v1.3, so not much should be different between > those versions and the final v1.3. > > To see why you should switch, read the FAQ entries about Memchecker > that start here: > http://www.open-mpi.org/faq/?category=debugging#memchecker_what > > On Mon, Dec 15, 2008 at 9:34 AM, Gabriele Fatigati <g.fatig...@cineca.it> > wrote: >> PS: i'm using openmpi 1.2.5.. >> >> 2008/12/15 Gabriele Fatigati <g.fatig...@cineca.it>: >>> Hi Jeff, >>> i recompiled libibverbs and libmthca with valgrind flas, but for >>> strage reasons, only warning over MPI_Send are disappears, but >>> warnings over MPI_Recv remains! >>> >>> 2008/12/15 Jeff Squyres <jsquy...@cisco.com>: >>>> Whoops; that was a reply to the wrong message. :-) >>>> >>>> You'll need to recompile both libiverbs and libmthca with the valgrind >>>> flag, >>>> and use the enhanced memchecker support in v1.3. >>>> >>>> I have not personally verified that all the warnings disappear in this >>>> configuration (I was hoping to verify this somewhere during the v1.3 >>>> series). >>>> >>>> >>>> >>>>> >>>>> On Dec 15, 2008, at 6:37 AM, Gabriele Fatigati wrote: >>>>> >>>>>> Hi Jeff, >>>>>> i recompiled libmthca with --with-valgrind flag, and modified >>>>>> enviroment variables, but warnings doesnt' disappears.. >>>>>> >>>>>> 2008/12/14 Jeff Squyres <jsquy...@cisco.com>: >>>>>>> >>>>>>> On Dec 14, 2008, at 8:21 AM, Gabriele Fatigati wrote: >>>>>>> >>>>>>>> i have a strage problems with OpenMPI 1.2.5 Intel Compiled when i >>>>>>>> debug my code under Valgrind 3.3. In a very simple ping-pong MPI >>>>>>>> application, i retrieve strange warnings about MPI Communications, >>>>>>>> like MPI_Send,MPI_Recv. Valgrind tells me that there are uninitialized >>>>>>>> values in send/recv buffers, but there are initialized, i'm absolutely >>>>>>>> sure! >>>>>>>> >>>>>>>> There warnings are detected when my application runs over Infiniband >>>>>>>> net, >>>>>>> >>>>>>> This is because IB uses memory that does not come from the memory >>>>>>> allocator >>>>>>> that Valgrind is aware of (e.g., it may be memory that was allocated by >>>>>>> the >>>>>>> kernel itself). Hence, since Valgrind is unaware of the memory, it >>>>>>> thinks >>>>>>> that its contents are undefined. As such, it's quite likely that you're >>>>>>> seeing false positives. >>>>>>> >>>>>>> The memchecker support in the upcoming v1.3 series made quite a few >>>>>>> advancements in the area of valgrind memory checking, and recent >>>>>>> versions of >>>>>>> libibverbs allow you to compile in valgrind extensions that tell >>>>>>> valgrind >>>>>>> "this memory is ok" (which prevents these false positives). I'm pretty >>>>>>> sure >>>>>>> that the OFED install does not enable these libibverbs valgrind >>>>>>> extensions; >>>>>>> you will likely need your own installation of libibverbs and your verbs >>>>>>> plugin (libmthca for you, I think...?) that explicitly has the valgrind >>>>>>> extensions enabled. >>>>>>> >>>>>>> -- >>>>>>> Jeff Squyres >>>>>>> Cisco Systems >>>>>>> >>>>>>> _______________________________________________ >>>>>>> users mailing list >>>>>>> us...@open-mpi.org >>>>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Ing. Gabriele Fatigati >>>>>> >>>>>> Parallel programmer >>>>>> >>>>>> CINECA Systems & Tecnologies Department >>>>>> >>>>>> Supercomputing Group >>>>>> >>>>>> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy >>>>>> >>>>>> www.cineca.it Tel: +39 051 6171722 >>>>>> >>>>>> g.fatig...@cineca.it >>>>>> _______________________________________________ >>>>>> users mailing list >>>>>> us...@open-mpi.org >>>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>>> >>>>> >>>>> -- >>>>> Jeff Squyres >>>>> Cisco Systems >>>>> >>>>> _______________________________________________ >>>>> users mailing list >>>>> us...@open-mpi.org >>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>> >>>> >>>> -- >>>> Jeff Squyres >>>> Cisco Systems >>>> >>>> _______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>> >>>> >>> >>> >>> >>> -- >>> Ing. Gabriele Fatigati >>> >>> Parallel programmer >>> >>> CINECA Systems & Tecnologies Department >>> >>> Supercomputing Group >>> >>> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy >>> >>> www.cineca.it Tel: +39 051 6171722 >>> >>> g.fatig...@cineca.it >>> >> >> >> >> -- >> Ing. Gabriele Fatigati >> >> Parallel programmer >> >> CINECA Systems & Tecnologies Department >> >> Supercomputing Group >> >> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy >> >> www.cineca.it Tel: +39 051 6171722 >> >> g.fatig...@cineca.it >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > > > -- > Tim Mattox, Ph.D. - http://homepage.mac.com/tmattox/ > tmat...@gmail.com || timat...@open-mpi.org > I'm a bright... http://www.the-brights.net/ > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > -- Ing. Gabriele Fatigati Parallel programmer CINECA Systems & Tecnologies Department Supercomputing Group Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy www.cineca.it Tel: +39 051 6171722 g.fatig...@cineca.it
