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

• Experimental Testbed: Each node of our testbed has 16 AMD Opteron 1.95 Ghz processors with 512 KB L2 cache. Each node also has 16 Gigabyte memory and PCI-Express bus. They are equipped with MT25418 HCAs with PCI-Ex interfaces. A 24-port Mellanox switch is used to connect all the nodes. The operating system used was RedHat Enterprise Linux Server 5.

• MVAPICH currently delivers one-way latency of 1.62 microseconds for 4 bytes, unidirectional bandwidth upto 1628 Million Bytes/sec and bidirectional bandwidth upto 2889 Million Bytes/sec on the above testbed. (1 Mega Byte = 1,048,576 Bytes; 1 Million Byte = 1,000,000 Bytes)