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UM0851 Arkusz danych(PDF) 53 Page - STMicroelectronics |
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UM0851 Arkusz danych(HTML) 53 Page - STMicroelectronics |
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53 / 245 page  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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