Performance Numbers of MVAPICH on em64t Platform (11/14/08)

• Experimental Testbed: Each node of our testbed has eight cores (2.83 GHz dual quad-core) and 8 GB main memory. The CPUs support the EM64T technology and run in 64 bit mode. The nodes support 16x PCI Express Gen2 interfaces and are equipped with Mellanox ConnectX HCAs with PCI Express interfaces. The operating system used was RedHat Enterprise Linux Server 5.

• MVAPICH currently delivers one-way latency of 1.18 microseconds for 4 bytes, unidirectional bandwidth upto 2571 Million Bytes/sec and bidirectional bandwidth upto 5027 Million Bytes/sec on the above testbed. (1 Mega Byte = 1,048,576 Bytes; 1 Million Byte = 1,000,000 Bytes)