Performance Report for A5483A, A5513A, and A5515A ATM/155 and ATM/622 Adapters
Performance Report on ATM adapters, Part No. A5483A, A5513A, and A5515A 09/30/99 3
The second set of tests consists of exchange of a single request and response packet of 1 byte
each. The packet is at the TCP level. The performance metric is the aggregate number of
request/response packet pairs (transactions) per second. This performance metric is an indication
of the number of user level packets the adapter can process in a second.
Test results show that the CPU and the platform type influence the single byte request/response
performance.
A transaction consisting of a request size of 1024 bytes and a response size of 2048 bytes over a
UDP protocol models an environment of NFS services running over ATM.
Tables 4 and 5 below show the throughput and request/response results on different platforms.
All the results are for MTU size of 9180 bytes.
Table 4
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: Results on Different Platforms with One 155 Adapter (Classical IP, One CPU)
Table 5: Results on Different Platforms with One 622 Adapter (Classical IP, One CPU)
The Bidirectional TCP Throughput on the V2250 is limited to 680 Mbps due to the fact that V2250
has 1X PCI I/O Backplane (32 bit and 33 Mhz). The V2500 has a 2X PCI I/O Backplane (64 bit,
33Mhz).
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The V2500 Platform tests for 155 and 622 adapters were run with 2 CPUs because the
minimum configuration for V2500 is 2 CPUs. The CPU utilization reported for V2500 is per CPU.
Test/Platform
V2250
V2500
N4000
Memory 1 GB 1 GB 1 GB
Outbound TCP Throughput Mbps 134.73 134.85 134.45
CPU Utilization % 8.3 5.99 6.5
Inbound TCP Throughput Mbps 132.78 132.36 132.03
CPU Utilization % 13.41 4.81 5.65
Bidirectional TCP Throughput Mbps 261.6 255.58 260.12
CPU Utilization % 24.675 10.25 11.17
TCP Single byte R/R transactions/sec 8364 14654 20421
CPU Utilization % 100 89.5 92.37
UDP (1K/2K) R/R transactions/sec 7264 8694 8769
CPU Utilization % 100.00 65.63 51.11
Test/Platform
V2250 V2500 N4000
Memory
1 GB 1 GB 1 GB
Outbound TCP Throughput Mbps 529.67 537.75 538.14
CPU Utilization % 65.78 15.52 26.85
Inbound TCP Throughput Mbps 512.41 538.29 535.42
CPU Utilization % 81.15 18.61 23.61
Bidirectional TCP Throughput Mbps 680.3 962.95 1005
CPU Utilization % 91.81 50.2 57.1
TCP Single byte R/R transactions/sec 8367 20944 28536
CPU Utilization % 100 100 100
UDP (1K/2K) R/R transactions/sec 7413 14658 18901
CPU Utilization % 100.00 100.00 100.00