Re: [OMPI users] TCP Nagle algorithm and latency

2007-07-28 Thread Jeff Squyres
Sorry I previously missed this mail. I just recently added an MCA parameter to OMPI that allows enabling or disabling Nagle's algorithm on the TCP BTL (OMPI's lowest layer for MPI point-to-point communications for TCP). However, I'll tell you that some of the OMPI developers thought that t

Re: [OMPI users] How to use multi TCP network

2007-07-28 Thread Jeff Squyres
Somehow I missed this e-mail, sorry... Can you send all the information listed on this web page: http://www.open-mpi.org/community/help/ On Jun 26, 2007, at 10:34 AM, Yuan Wan wrote: Hi all, I'm benchmarking our new cluster with HPL. I pick OpenMPI as parallel environment as I found

Re: [OMPI users] mpi with icc, icpc and ifort :: segfault (Jeff Squyres)

2007-07-28 Thread Jeff Squyres
Ricardo was generous to give me access to two configurations with the Intel 10 compilers: 1. 64 bit EMT64 desktop / server 2. 32 bit centrino-based laptop On the 64 bit platform, both the 32 bit and 64 bit intel compilers worked fine with Open MPI. On the 32 bit platform, I was able to rep

Re: [OMPI users] mpi with icc, icpc and ifort :: segfault (Jeff Squyres)

2007-07-28 Thread George Bosilca
Jeff, Can you disassemble this function (from gdb) and post the assembly code ? This might help us to see what's wrong there. Thanks, george. On Jul 28, 2007, at 8:42 AM, Jeff Squyres wrote: Ricardo was generous to give me access to two configurations with the Intel 10 compilers: 1.