easynic
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lukego
[Mildy interesting] NIC speed vs. driver lines of code
The plot shows Ethernet drivers in Linux 4.19 and DPDK (forgot the exact version) by the maximum speed they support vs. the lines of code. There is a linear correlation (R^2 = 0.37) between network speed and driver complexity, so it's only going to get worse for now.
I'm just wondering why the 0.3624x + 5781 is curvy! Shouldn't it be just straight?
This is a cool slide :). So we can state the EasyNIC goal as being to have y=500 instead of y=0.3624x+5781. That's our marketing message taken care of! ;-)
@emmericp Have you looked at total lines of code per vendor? (Are there any vendors who support 10G-100G with a small amount of driver code covering all their current models for both Linux and DPDK?)
The Amazon ena drivers are relatively simple with ~7k lines of code for both the DPDK and Linux drivers: https://github.com/amzn/amzn-drivers
$ cloc linux/drivers/net/ethernet/amazon/
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Language files blank comment code
-------------------------------------------------------------------------------
C 4 1489 537 5693
C/C++ Header 8 631 1191 1474
make 2 3 6 3
-------------------------------------------------------------------------------
SUM: 14 2123 1734 7170
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$ cloc dpdk/drivers/net/ena/
-------------------------------------------------------------------------------
Language files blank comment code
-------------------------------------------------------------------------------
C 3 1087 328 4205
C/C++ Header 13 836 1320 2414
make 1 7 39 17
NAnt script 1 3 0 8
-------------------------------------------------------------------------------
SUM: 18 1933 1687 6644
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And ENA started off supporting 10 Gbps, then 25, now up to 100 Gbps - without driver changes.
Do you have a source for 100G support on EC2 VMs? I haven't classified ENA as 100G in the graph above because I couldn't find such hardware. Sure, it claims to support up to 400G but if there's no hardware then that doesn't really count ;)