Performance Numbers of MVAPICH on opteron Platform (02/28/08)

• Experimental Testbed: Each node of our testbed has two AMD Opteron 2.8 Ghz processors with 1024 KB L2 cache. Each node also has 4 Gigabyte memory and PCI-Express bus. They are equipped with MT25208 HCAs with PCI-Ex interfaces. A Flextronics 144-port DDR switch is used to connect all the nodes. The operating system used was Red Hat AS4.

• MVAPICH currently delivers one-way latency of 2.96 microseconds for 4 bytes, unidirectional bandwidth upto 1416 Million Bytes/sec and bidirectional bandwidth upto 2299 Million Bytes/sec on the above testbed. (1 Mega Byte = 1,048,576 Bytes; 1 Million Byte = 1,000,000 Bytes)