Performance Report for J2468A, J2469A, J2499A, J3573A, and J2806CA ATM/155 and ATM/622 Adapters

Performance Report on ATM adapters 3
The Request/Response performance of the adapter is measured in transactions per sec. A
transaction is defined as the exchange of a single request and single response. A transaction
consisting of request and response size of one byte each indicates the number of packets the
adapter can process in a second. This transaction is done using the TCP protocol. Test results
show that the single byte request/response performance is limited by the CPU.
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. The UDP
transactions are also limited by the CPU.
In addition, the request/response performance is affected by the MTU size. A higher MTU size
gives better request/response performance.
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. The SpecInt95 figures are also shown for
comparison purposes.
Table 4: 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)
Test/Platform
B160L C240 J2240 D380 T600 K580
SpecInt95
8.05 17.3 17.4 12.3 11.8 17.5
Memory 128 MB 128 MB 256 MB 256 MB 1.5 GB 1 GB
Outbound TCP Throughput Mbps 128.82 133.92 134.21 134.54 133.86 134.55
CPU Utilization % 50.52 15.45 10.27 15.25 23.86 8.14
Inbound TCP Throughput Mbps 131.43 134.72 134.63 135 132.32 132.9
CPU Utilization % 64.6 34.945 26.65 18.01 29.09 10.92
Bidirectional TCP Throughput Mbps 206.3 254.85 257.41 260.93 249.18 261
CPU Utilization % 93.7 52.465 48.44 44.31 89.29 22.8
TCP Single byte R/R transactions/sec 4452.96 5605.02 5565.29 5346.94 5101.34 5586.82
CPU Utilization % 78.602 49.24 46.36 41.04 60.62 38.65
UDP (1K/2K) R/R transactions/sec 3471.69 4312.18 4411.62 4347.79 3830.78 4500.14
CPU Utilization % 95.86 46.11 43.62 46.30 71.59 41.88
Test/Platform
D380 T600 K580
SpecInt95
12.3 11.8 17.5
Memory 256 MB 1.5 GB 1 GB
Outbound TCP Throughput Mbps 349.77 275.6 370.1
CPU Utilization % 45.29 81.57 35.22
Inbound TCP Throughput Mbps 460.59 289.65 540.4
CPU Utilization % 92.97 66.25 85.08
Bidirectional TCP Throughput Mbps 435.58 294.5 584.5
CPU Utilization % 99.83 99.94 95.86
TCP Single byte R/R transactions/sec 5606.92 5376.18 6110.74
CPU Utilization % 48.13 63.68 36.03
UDP (1K/2K) R/R transactions/sec 5137.11 4254.38 5125.12
CPU Utilization %
58.76
79.72
46.79