UM0851 Datasheet, PDF (53/245 Pages) STMicroelectronics – SPEAr is a family of highly customizable ARM-based embedded

UM0851
Communication device drivers
Table 15. SPEAr600 Ethernet evaluation results
Reception baud
Throughput for the test case 30 seconds (./netperf -l 30 -H 192.168.1.10 ) at
Linux PC (Reception baud)
Transmission
baud
Throughput for the test case run for 30 seconds
(./netperf -l 30 -H 192.168.1.1) at SPEAr (Transmission baud)
Note:
For the tests conducted above the number of DMA descriptors used for Rx are 64, and for
Tx are 128. The speeds shown above are in Mbps.
Figure 9. Ethernet performance evaluation results (Checksum offloading disabled)
4500
4000
3500
3000
2500
2000
1500
1000
500
0
0
100
200
300
400
Performance in Mbps
RX (ChkSumOff
Disabled/CRC Strip
Disabled)
TX (ChkSumOff
Disabled/CRC Strip
Disabled)
RX (ChkSumOff
Disabled/CRC Strip
Enabled)
TX (ChkSumOff
Disabled/CRC Strip
Enabled)
Figure 10. Ethernet performance evaluation results (Checksum offloading enabled)
4500
4000
3500
3000
2500
2000
1500
1000
500
0
0
200
400
Performance in Mbps
600
RX (ChkSumOff
Enabled/CRC Strip
Disabled)
TX (ChkSumOff
Enabled/CRC Strip
Disabled)
RX (ChkSumOff
Enabled/CRC Strip
Enabled)
TX (ChkSumOff
Enabled/CRC Strip
Enabled)
Doc ID 16604 Rev 2
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