Hackers' Pub

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✧✦Catherine✦✧ @whitequark@treehouse.systems

1/27/2026, 2:04:17 AM

Public

hey, check this out

i dusted off my Glasgow RGMII Ethernet driver code (10/100 capable only) and with the latest changes in flow control, it effortlessly ~saturates the Ethernet link both ways, with a userspace driver running on CPython:

[ ID] Interval       Transfer     Bandwidth
[  1] 0.0000-10.2720 sec   115 MBytes  93.6 Mbits/sec
[ ID] Interval       Transfer     Bandwidth
[  2] 0.0000-10.2936 sec   115 MBytes  93.9 Mbits/sec

this is with driver & FPGA code that prioritize simplicity over performance, and without even attempting to do Ethernet-optimized flow control; just using the normal Glasgow framework

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