> However, setting:
> -mca btl_openib_eager_limit 65536
> gave a 15% improvement so OpenMPI is now down to 326 (from previous
> 376 seconds). Still a lot more than ScaliMPI with 214 seconds.
Can you please run ibv_devinfo on one of compute nodes ? It is
interesting to know what kind of IB HW you have on our cluster.