A6826A - PCI-X Dual port 2Gb/s Fibre Channel Adapter Performance Paper for PCI Platforms

Throughput
Chart 2a : Single and Dual Port Throughput Chart 2b : CPU Utilization for Throughput tests
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Number of Ports
Throughput (MB/s)
2Gb/s FC
Therotical Max
200 400
Read
195.15 390.03
Write
188.13 368.77
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Number of Ports
%CPU utilization
Read
6.53 11.54
Write
6.21 12.01
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Data obtained on a single cell, single CPU, rp8400
The chart 2a shows the read and write throughput of single and dual ports of A6826A. The X-axis is the number
of Fibre Channel ports. The Y-axis is the throughput in MB/s.
As the chart 2a shows, one port of A6828A performs read at 195MB/s. Two ports scale at 2x the performance
of single port performing reads up to 383MB/s.
For the write operations, one port of A6826A performs write operations at 188MB/s. Two ports scale
approximately at 2x the performance of the single port performing writes up to 368MB/s.
The chart 2a demonstrates outstanding read and write performance with linear scaling for 1 and 2 ports of
A6826A.
The chart 2b shows the % CPU utilization of throughput tests. The X-axis is the number of the Fibre Channel port.
The Y-axis is the % CPU utilization. Only one 1 CPU is configured in these tests, hence this is a single CPU
utilization. The charts 2b shows very small percentages of CPU utilization for single and dual ports in read and
write throughput tests.
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