Performance numbers of MVAPICH2-X on Westmere Architecture (05/06/13)

• Experimental Testbed: Each node of our testbed has eight cores (2.53 GHz dual quad-core) and 12 GB main memory. The CPUs based on Westmere architecture and run in 64 bit mode. The nodes support MT26428 QDR ConnectX HCAs (36 Gbps data rate) with PCI-Ex Gen2 interfaces and are interconnected over 171-port Mellanox QDR switch. The operating system used was RedHat Enterprise Linux Server release 5.4 (Tikanga). The processes were bound to core 1 on both nodes.

• MVAPICH2-X currently delivers UPC put latency of 0.41 microseconds for 4 bytes, UPC get latency of 1.83 microseconds for 4 bytes.