HP 2G PCI-X 2 Gigabit Fibre Channel and Gigabit EthernetPerformanceUsing the H - Page 11

Throughput Figure 7 300 PCI-X Fibre Channel Bidirectional Performance 250 MBytes/sec 200 150 270 253 254 100 238 227 226 1 Cell 2 Cells 4 Cells 50 0 BD BD + GigE BD Figure 7 shows PCI-X Fibre Channel Bidirectional (BD) performance. With 1, 2, or 4 cells configured, the following throughput rates were achieved: • Bidirectional throughput on the FC port with no GigE traffic on a 1 cell partition is 270 MBytes/sec. As the partition size is increased by adding up to 3 more cells, Bidirectional throughput decreases to 254 MBytes/sec. A similar pattern emerges when FC bidirectional and GigE bidirectional are combined. FC bidirectional throughput is 238 MBytes/sec on a 1 cell partition and decreases to 226 MBytes/sec as partition size is increased to 4 cells. • When tested in a PCI-66 slot, the performance results for Bidirectional only throughput showed a similar pattern when compared to PCI-X. Bidirectional throughput on the FC port with no GigE traffic on a 1 cell partition is 250 MBytes/sec. As you increase the partition size by adding up to 3 more cells, bidirectional throughput decreases to 230 MBytes/sec. When FC bidirectional and GigE bidirectional traffic are combined, PCI-66 performance is 155 MBytes/sec. As you increase the partition size by adding up to 3 more cells, bidirectional throughput decreases to 127 MBytes/sec. The decreased performance seen when both ports are active on the A9782A/A9784A is a result of the bandwidth limitation of the PCI-66 technology and is not due to a limitation in the adapter. 11