I'm using winpcap to capture datas from FPGA board via 1G Ethernet connection(directly connected). the FPGA is configed to send data at a special rate. With the fpga sending rate increases,especially above 500Mbps, it sometimes loss packets.
Q1: Is it possible to totally avoid packets loss by optimism the code? I want to collect datas at speed 614Mbps without packet loss (collecting all datas last about 1 minutes). My workstations features with 2 Xeon CPU (each has 4core), DDR3 SDRAM, 1 G onboard netcard. Which part is the most probably bottleneck ? Q2: As a test , I found the pcap_next_ex() can't get any packets when the user buffer is set over 64 MB, what does it happen ? Q3: if the Kernel buffer's size is 16MB , then the first 16Mb packets from fpga won't be lost, so , if I set the kernel buffer as 128MB , then at least the first coming 128MB data from FPGA won't be lost either ? but I found When I set the kernel buffer bigger than 100 MB, the packets drops is getting worse. Thanks a lot!
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