Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Understood - but I was wondering if that was true for OMPI as well. On Jul 9, 2013, at 11:30 AM, "Daniels, Marcus G" wrote: > The Intel MPI implementation does this. The performance between the > accelerators and the host is poor though. About 20mb/sec in my ping/pong >

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

The Intel MPI implementation does this. The performance between the accelerators and the host is poor though. About 20mb/sec in my ping/pong test. Intra-MIC communication is about a 1GB/sec whereas intra-host is about 6GB/sec. Latency is higher (i.e. worse) for the intra-MIC communication

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Hi Tim Quick question: can the procs on the MIC communicate with procs on (a) the local host, (b) other hosts, and (c) MICs on other hosts? The last two would depend on having direct access to one or more network transports. On Jul 9, 2013, at 10:18 AM, Tim Carlson

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

On Mon, 8 Jul 2013, Tim Carlson wrote: Now that I have gone through this process, I'll report that it works with the caveat that you can't use the openmpi wrappers for compiling. Recall that the Phi card does not have either the GNU or Intel compilers installed. While you could build up a

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

On Mon, 8 Jul 2013, Elken, Tom wrote: My mistake on the OFED bits. The host I was installing on did not have all of the MPSS software installed (my cluster admin node and not one of the compute nodes). Adding the intel-mic-ofed-card RPM fixed the problem with compiling the btl:openib bits

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Hi Tim, Well, in general and not on MIC I usually build the MPI stacks using the Intel compiler set. Have you ran into s/w that requires GCC instead of Intel compilers (beside Nvidia Cuda)? Did you try to use Intel compiler to produce MIC native code (the OpenMPI stack for that matter)?

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Hi Tim, Well, in general and not on MIC I usually build the MPI stacks using the Intel compiler set. Have you ran into s/w that requires GCC instead of Intel compilers (beside Nvidia Cuda)? Did you try to use Intel compiler to produce MIC native code (the OpenMPI stack for that matter)? regards

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

On Mon, 8 Jul 2013, Elken, Tom wrote: It isn't quite so easy. Out of the box, there is no gcc on the Phi card. You can use the cross compiler on the host, but you don't get gcc on the Phi by default. See this post http://software.intel.com/en-us/forums/topic/382057 I really think you would

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Thanks Tom, I will test it out... regards Michael On Mon, Jul 8, 2013 at 1:16 PM, Elken, Tom wrote: > ** ** > > Thanks Tom, that sounds good. I will give it a try as soon as our Phi host > here host gets installed. > > ** ** > > I assume that all the prerequisite

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Thanks Tom, that sounds good. I will give it a try as soon as our Phi host here host gets installed. I assume that all the prerequisite libs and bins on the Phi side are available when we download the Phi s/w stack from Intel's site, right ? [Tom] Right. When you install Intel's MPSS

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Thanks Tom, that sounds good. I will give it a try as soon as our Phi host here host gets installed. I assume that all the prerequisite libs and bins on the Phi side are available when we download the Phi s/w stack from Intel's site, right ? Cheers Michael On Mon, Jul 8, 2013 at 12:10 PM,

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Do you guys have any plan to support Intel Phi in the future? That is, running MPI code on the Phi cards or across the multicore and Phi, as Intel MPI does? [Tom] Hi Michael, Because a Xeon Phi card acts a lot like a Linux host with an x86 architecture, you can build your own Open MPI libraries

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Thanks ... Michael On Mon, Jul 8, 2013 at 8:50 AM, Rolf vandeVaart wrote: > With respect to the CUDA-aware support, Ralph is correct. The ability to > send and receive GPU buffers is in the Open MPI 1.7 series. And > incremental improvements will be added to the Open

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

With respect to the CUDA-aware support, Ralph is correct. The ability to send and receive GPU buffers is in the Open MPI 1.7 series. And incremental improvements will be added to the Open MPI 1.7 series. CUDA 5.0 is supported. From: users-boun...@open-mpi.org

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

There was discussion of this on a prior email thread on the OMPI devel mailing list: http://www.open-mpi.org/community/lists/devel/2013/05/12354.php On Jul 6, 2013, at 2:01 PM, Michael Thomadakis wrote: > thanks, > > Do you guys have any plan to support Intel Phi

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

thanks, Do you guys have any plan to support Intel Phi in the future? That is, running MPI code on the Phi cards or across the multicore and Phi, as Intel MPI does? thanks... Michael On Sat, Jul 6, 2013 at 2:36 PM, Ralph Castain wrote: > Rolf will have to answer the

Re: [OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Rolf will have to answer the question on level of support. The CUDA code is not in the 1.6 series as it was developed after that series went "stable". It is in the 1.7 series, although the level of support will likely be incrementally increasing as that "feature" series continues to evolve.

[OMPI users] Support for CUDA and GPU-direct with OpenMPI 1.6.5 an 1.7.2

Hello OpenMPI, I am wondering what level of support is there for CUDA and GPUdirect on OpenMPI 1.6.5 and 1.7.2. I saw the ./configure --with-cuda=CUDA_DIR option in the FAQ. However, it seems that with configure v1.6.5 it was ignored. Can you identify GPU memory and send messages from it