Hello! i try at the moment to figure out why our QDR Infiniband is not as fast as it should be. So I realized that we use 2k mtu size, and tried to change this to 4k. But don't now how.
enviroment: mellanox connectX-3 cards in interlagos machine with sl6.3 64 bit (RHEL/SL Ofed stack) mellanox sx6036 switch (4k mtu enabled) in the mellanox docu i found something about a module parameter "set_4k_mtu" but this don't work with SL6.3 (unknown parameter) this also don't work, because there is no "mlx4_port1_mtu" echo 4096 > /sys/class/infiniband/mlx4_0/device/mlx4_port1_mtu is it possible that the sl mellanox module don't support 4k mtu? best regards sven
