Às 2:52 PM de 4/12/2017, Andrew Lunn escreveu: >>>> My setup is FPGA based, so it will have lower performance values. >>>> Iperf results with >>>> "Drop Transmit Status" set: ~650Mbps. >>>> "Drop Transmit Status" unset: ~450Mbps. >>> >>> What percentage of your customers use FPGAs? When i look at the users >>> of this driver, i see ST, Allwinner, Rockchip, Meson, etc. So silicon, >>> not FPGA. Does it make sense to do performance measurements on FPGA, >>> when you say it has lower performance? >> >> I don't understand your question. Synopsys is an IP vendor, so all recent IPs >> are available for prototyping as you can understand and so early development >> is >> done using a FPGA. > > Sure, early development on FPGA makes sense. But my guess is, > 95% of > the devices running this driver are silicon, not FPGA. The customers > you sell the IP to want to know that the driver is going to work well > on their silicon, not your internal FPGA development setup. The kernel > community want a warm fuzzy feeling that you care about the real > devices out in the wild using this driver. So if you could say, "I > tested on a STM DISCO devel board, and performance went up 20%, an > RK3288 devel board and got 18% performance boost, and a Merrii A80 > Optimus Board showed 22% improvements", we would have a lot better > feeling about these patches.
Understand your point, but for now our development and testing setup will be based on the IP Prototyping Kit, consisting of a FPGA + PHY. Thanks, Joao > > Andrew >
