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lukego / easynic

EasyNIC: an easy-to-use host interface for network cards
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[Mildy interesting] NIC speed vs. driver lines of code #14

Open emmericp opened 5 years ago

emmericp commented 5 years ago

drivers-loc-scatterplot

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.

sarsanaee commented 5 years ago

I'm just wondering why the 0.3624x + 5781 is curvy! Shouldn't it be just straight?

lukego commented 5 years ago

@sarsanaee log scale?

lukego commented 5 years ago

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! ;-)

lukego commented 5 years ago

@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?)

emmericp commented 5 years ago

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/
-------------------------------------------------------------------------------
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
-------------------------------------------------------------------------------

$ 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
-------------------------------------------------------------------------------
mswilson commented 5 years ago

And ENA started off supporting 10 Gbps, then 25, now up to 100 Gbps - without driver changes.

emmericp commented 5 years ago

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 ;)