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UM0851 Datasheet(PDF) 53 Page - STMicroelectronics

Part # UM0851
Description  SPEAr is a family of highly customizable ARM-based embedded
PDF  245 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0851 Datasheet(HTML) 53 Page - STMicroelectronics

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UM0851
Communication device drivers
Doc ID 16604 Rev 2
53/245
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)
Figure 10.
Ethernet performance evaluation results (Checksum offloading enabled)
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)
Table 15.
SPEAr600 Ethernet evaluation results
0
500
1000
1500
2000
2500
3000
3500
4000
4500
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)
0
500
1000
1500
2000
2500
3000
3500
4000
4500
0
200
400
600
Performance in Mbps
RX (ChkSumOff
Enabled/CRC Strip
Disabled)
TX (ChkSumOff
Enabled/CRC Strip
Disabled)
RX (ChkSumOff
Enabled/CRC Strip
Enabled)
TX (ChkSumOff
Enabled/CRC Strip
Enabled)



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