Hi all,
I am benchmarking a sockets based application and I want a sanity check on
IPoIB performance expectations when using connected mode (65520 MTU). I am
using the tuning tips in Documentation/infiniband/ipoib.txt. The machines have
Mellanox QDR cards (see below for the verbose ibv_devinfo output). I am using a
2.6.36 kernel. The hosts have single socket Intel E5520 (4 core with
hyper-threading on) at 2.27 GHz.
I am using netperf's TCP_STREAM and binding cores. The best I have seen is ~13
Gbps. Is this the best I can expect from these cards?
What should I expect as a max for ipoib with FDR cards?
Thanks,
Scott
hca_id: mlx4_0
transport: InfiniBand (0)
fw_ver: 2.7.626
node_guid: 0002:c903:000b:6520
sys_image_guid: 0002:c903:000b:6523
vendor_id: 0x02c9
vendor_part_id: 26428
hw_ver: 0xB0
board_id: MT_0D90110009
phys_port_cnt: 1
max_mr_size: 0xffffffffffffffff
page_size_cap: 0xfffffe00
max_qp: 65464
max_qp_wr: 16384
device_cap_flags: 0x006c9c76
max_sge: 32
max_sge_rd: 0
max_cq: 65408
max_cqe: 4194303
max_mr: 131056
max_pd: 32764
max_qp_rd_atom: 16
max_ee_rd_atom: 0
max_res_rd_atom: 1047424
max_qp_init_rd_atom: 128
max_ee_init_rd_atom: 0
atomic_cap: ATOMIC_HCA (1)
max_ee: 0
max_rdd: 0
max_mw: 0
max_raw_ipv6_qp: 0
max_raw_ethy_qp: 0
max_mcast_grp: 8192
max_mcast_qp_attach: 56
max_total_mcast_qp_attach: 458752
max_ah: 0
max_fmr: 0
max_srq: 65472
max_srq_wr: 16383
max_srq_sge: 31
max_pkeys: 128
local_ca_ack_delay: 15
port: 1
state: PORT_ACTIVE (4)
max_mtu: 2048 (4)
active_mtu: 2048 (4)
sm_lid: 6
port_lid: 8
port_lmc: 0x00
link_layer: InfiniBand
max_msg_sz: 0x40000000
port_cap_flags: 0x02510868
max_vl_num: 8 (4)
bad_pkey_cntr: 0x0
qkey_viol_cntr: 0x0
sm_sl: 0
pkey_tbl_len: 128
gid_tbl_len: 128
subnet_timeout: 18
init_type_reply: 0
active_width: 4X (2)
active_speed: 10.0 Gbps (4)
phys_state: LINK_UP (5)
GID[ 0]:
fe80:0000:0000:0000:0002:c903:000b:6521
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