Newsgroups: comp.parallel.mpi From: paul@cee.hw.ac.uk (Paul Bristow) Subject: Re: [HELP] lam under Alpha/LINUX Organization: Dept of Computing & Electrical Engineering, Heriot-Watt University, Scotland Date: Thu, 12 Feb 1998 16:45:33 GMT Message-ID: J-M Beuken (beuken@pcpm.ucl.ac.be) wrote: : Hello, : I have a Alpha/LINUX(RedHat 5.0) cluster and I want to use LAM/MPI. : I have a lot of problems , not during compilation but during execution of : recon,lamboot, mpirun, fctl... : Somebody have already use with success LAM with Alpha/LINUX ? : for compilation (EGCS 1.0.1 gcc) , I put in Config/config : OS=LINUX : CPU=alpha : Error report during execution : : 1) problems with recon or lamboot : >lamboot -v Nodes : local host not present : > : in the lam/share/boot/lamnet.c : /* : * Get network interface configuration. : */ : if (ioctl(sock, SIOCGIFCONF, &config)) { : close(sock); : return(LAMERROR); : } : the ioctl return only the lo interface, not the eth0 , then lamboot : doesn't find the local host in the Node's file because the ip 127.0.0.1 : (lo) is different of the ip address (eth0) of the origin node. : if this test is bypassed then lamboot can run (I must put the localhost, : first in the list of nodes ) : 2) this is the error message with mpirun : : mpirun -v myapp : mpirun (set_stdio): Invalid argument : the problem is with the 'sendmsg' call (libc.a or libpthread.a) used in : the source file "/lam/lib/otb/t/etc/sfrd.c" : if (sendmsg(stream, &msg, 0) != 1) { : return(-1); : } : conclusions : I believe that there are problems with Alpha/LINUX kernel or : libraries. (under Intel/LINUX , there are no problems !) : any ideas ? comments ? pointers ? : thanks in advance, : jmb : -- : J-M Beuken : Lab PCPM/MAPR/FSA : University of Louvain-la-Neuve : Belgium : http://www.mapr.ucl.ac.be/~beuken I vaguely remember hearing about there being a problem with mpi under Redhat 5.0. I think it was something to do with Redhat 5.0's version of libc crashing mpi (or vice versa if you like). It was probably in this newsgroup that it was mentioned - try trawling the archives. You say it works fine under Intel/Linux but which Linux release, is it Redhat 5.0 too? -- Paul C Bristow, Dept. Computing & Elec. Eng. Heriot-Watt University, Edinburgh EH14 4AS. Phone: (+44) 131 451 5111 ext 4179. e-mail: paul@cee.hw.ac.uk, personal e-mail: pcb@cableinet.co.uk 'veni, vidi, vibi'