On Jul 18, 2010, at 4:09 PM, Philippe wrote: > Ralph, > > thanks for investigating. > > I've applied the two patches you mentioned earlier and ran with the > ompi server. Although i was able to runn our standalone test, when I > integrated the changes to our code, the processes entered a crazy loop > and allocated all the memory available when calling MPI_Port_Connect. > I was not able to identify why it works standalone but not integrated > with our code. If I found why, I'll let your know.
How many processes are we talking about? > > looking forward to your findings. We'll be happy to test any patches > if you have some! > > p. > > On Sat, Jul 17, 2010 at 9:47 PM, Ralph Castain <r...@open-mpi.org> wrote: >> Okay, I can reproduce this problem. Frankly, I don't think this ever worked >> with OMPI, and I'm not sure how the choice of BTL makes a difference. >> >> The program is crashing in the communicator definition, which involves a >> communication over our internal out-of-band messaging system. That system >> has zero connection to any BTL, so it should crash either way. >> >> Regardless, I will play with this a little as time allows. Thanks for the >> reproducer! >> >> >> On Jun 25, 2010, at 7:23 AM, Philippe wrote: >> >>> Hi, >>> >>> I'm trying to run a test program which consists of a server creating a >>> port using MPI_Open_port and N clients using MPI_Comm_connect to >>> connect to the server. >>> >>> I'm able to do so with 1 server and 2 clients, but with 1 server + 3 >>> clients, I get the following error message: >>> >>> [node003:32274] [[37084,0],0]:route_callback tried routing message >>> from [[37084,1],0] to [[40912,1],0]:102, can't find route >>> >>> This is only happening with the openib BTL. With tcp BTL it works >>> perfectly fine (ofud also works as a matter of fact...). This has been >>> tested on two completely different clusters, with identical results. >>> In either cases, the IB frabic works normally. >>> >>> Any help would be greatly appreciated! Several people in my team >>> looked at the problem. Google and the mailing list archive did not >>> provide any clue. I believe that from an MPI standpoint, my test >>> program is valid (and it works with TCP, which make me feel better >>> about the sequence of MPI calls) >>> >>> Regards, >>> Philippe. >>> >>> >>> >>> Background: >>> >>> I intend to use openMPI to transport data inside a much larger >>> application. Because of that, I cannot used mpiexec. Each process is >>> started by our own "job management" and use a name server to find >>> about each others. Once all the clients are connected, I would like >>> the server to do MPI_Recv to get the data from all the client. I dont >>> care about the order or which client are sending data, as long as I >>> can receive it with on call. Do do that, the clients and the server >>> are going through a series of Comm_accept/Conn_connect/Intercomm_merge >>> so that at the end, all the clients and the server are inside the same >>> intracomm. >>> >>> Steps: >>> >>> I have a sample program that show the issue. I tried to make it as >>> short as possible. It needs to be executed on a shared file system >>> like NFS because the server write the port info to a file that the >>> client will read. To reproduce the issue, the following steps should >>> be performed: >>> >>> 0. compile the test with "mpicc -o ben12 ben12.c" >>> 1. ssh to the machine that will be the server >>> 2. run ./ben12 3 1 >>> 3. ssh to the machine that will be the client #1 >>> 4. run ./ben12 3 0 >>> 5. repeat step 3-4 for client #2 and #3 >>> >>> the server accept the connection from client #1 and merge it in a new >>> intracomm. It then accept connection from client #2 and merge it. when >>> the client #3 arrives, the server accept the connection, but that >>> cause client #1 and #2 to die with the error above (see the complete >>> trace in the tarball). >>> >>> The exact steps are: >>> >>> - server open port >>> - server does accept >>> - client #1 does connect >>> - server and client #1 do merge >>> - server does accept >>> - client #2 does connect >>> - server, client #1 and client #2 do merge >>> - server does accept >>> - client #3 does connect >>> - server, client #1, client #2 and client #3 do merge >>> >>> >>> My infiniband network works normally with other test programs or >>> applications (MPI or others like Verbs). >>> >>> Info about my setup: >>> >>> openMPI version = 1.4.1 (I also tried 1.4.2, nightly snapshot of >>> 1.4.3, nightly snapshot of 1.5 --- all show the same error) >>> config.log in the tarball >>> "ompi_info --all" in the tarball >>> OFED version = 1.3 installed from RHEL 5.3 >>> Distro = RedHat Entreprise Linux 5.3 >>> Kernel = 2.6.18-128.4.1.el5 x86_64 >>> subnet manager = built-in SM from the cisco/topspin switch >>> output of ibv_devinfo included in the tarball (there are no "bad" nodes) >>> "ulimit -l" says "unlimited" >>> >>> The tarball contains: >>> >>> - ben12.c: my test program showing the behavior >>> - config.log / config.out / make.out / make-install.out / >>> ifconfig.txt / ibv-devinfo.txt / ompi_info.txt >>> - trace-tcp.txt: output of the server and each client when it works >>> with TCP (I added "btl = tcp,self" in ~/.openmpi/mca-params.conf) >>> - trace-ib.txt: output of the server and each client when it fails >>> with IB (I added "btl = openib,self" in ~/.openmpi/mca-params.conf) >>> >>> I hope I provided enough info for somebody to reproduce the problem... >>> <ompi-output.tar.bz2>_______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
