[OMPI users] all2all algorithms

I am curious about the algorithm(s) used in the OpenMPI implementations of the all2all and all2allv. As many of you know, there are alternate algorithms for all2all type operations, such as that of Plimpton, et al (2006), that basically exchange latency costs for bandwidth costs, which pays big

Re: [OMPI users] 1.3.1 -rf rankfile behaviour ??

Hi, The first "crash" is OK, since your rankfile has ranks 0 and 1 defined, while n=1, which means only rank 0 is present and can be allocated. NP must be >= the largest rank in rankfile. What exactly are you trying to do ? I tried to recreate your seqv but all I got was

Re: [OMPI users] mpirun: symbol lookup error: /usr/local/lib/openmpi/mca_plm_lsf.so: undefined symbol: ls b_init

We're having this same problem with 1.3 and 1.3.1. In our case, it looks like mca_plm_lsf.so doesn't load libbat or liblsf: [root@hero0101 openmpi]# ldd mca_plm_lsf.so libnsl.so.1 => /lib64/libnsl.so.1 (0x2adbec183000) libutil.so.1 => /lib64/libutil.so.1 (0x2adbec39b000)