622 Adapters

Performance Report on ATM adapters, Part No. A5483A, A5513A, and A5515A 09/30/99 5

Each netperf process was bound to the same CPU that the adapter uses to send interrupts to.

The Classical IP interface on each adapter was configured with a different IP subnet; that is, there

were eight IP subnets configured in an eight-adapter test.

On V-series platforms, one 622 adapter was configured per PCI Controller, and a maximum of

two 155 adapters were installed in a PCI Controller. On N-series platforms, the 622 Adapters

were installed in the Twin Turbo slots.

Tables 6 and 7 below show scalability results on different server platforms for up to eight 155 and

622 adapters, respectively.

Table 6: Results on Different Platforms with 8 155 Adapters (8 CPUs, Classical IP)

Table 7

: Results on different platforms with 8 622 Adapters(8 CPUs, Classical IP)

Test/Platform V2250 V2500 N4000

Memory 1 GB 1 GB 8 GB

Outbound TCP Throughput Mbps 3338 3799 4209

CPU Utilization % 95.67 77.61 95.78

Inbound TCP Throughput Mbps 1965 3605 4000

CPU Utilization % 70.76 54.47 83.76

Bidirectional TCP Throughput Mbps 2360 3262 4020

CPU Utilization % 96.42 85.24 90.97

TCP Single Byte R/R transactions/sec 44819 67935 75763

CPU Utilization % 100 100 100

UDP(1K/2K) R/R transactions/sec 33669 52632 49787

CPU Utilization % 100 100 100

Tests on the LAN Emulation Interface show that the maximum throughput using multiple adapters

is less than the corresponding results for the Classical IP interface. Tests with MTU size of 9

Kbytes give better results than MTU size of 1500 bytes. For example, see Tables 8 and 9 below

for results on 155 and 622 adapters, respectively.

The Inbound and Bidirectional Throughput data for the N4000 platform is estimated.

Test/Platform V2250 V2500 N4000

Memory 1 GB 1 GB 1 GB

Outbound TCP Throughput Mbps 1034 1041 1076

CPU Utilization % 23.96 20.94 6.04

Inbound TCP Throughput Mbps 1038 1054 1059

CPU Utilization % 21.36 10.94 7.05

Bidirectional TCP Throughput Mbps 1698 1902 2062

CPU Utilization % 43.97 50.12 26.86

TCP Single byte R/R transactions/sec 38097 56918 63466

CPU Utilization % 95.16 100 100

UDP (1K/2K) R/R transactions/sec 34450 36752 40943

CPU Utilization % 100.00 100.00 100.00