4 ms·
I'm curious about CPU usage for the two adapter types. My experience (quite a while back...) was that USB required a bunch more involvement from the CPU than th
by kabdib 6y ago
I'm curious about CPU usage for the two adapter types. My experience (quite a while back...) was that USB required a bunch more involvement from the CPU than the simpler block-oriented drivers.
(Hubs don't affect things much; on the order of tens of nanoseconds of additional latency when things line up properly).
- geerlingguy 6y agoOverclocking the Pi's CPU _does_ increase the speed of some operations, for sure. For example, in my network tests, I can get 1.9 Gbps on a 2.5G adapter with MTU 1500 at 1.5 GHz (default Pi 4 clock), or 2.2 Gbps at 2.0 GHz. Using MTU 9000 lets me get over 2.3G on that adapter.
- megous 6y agoFor USB 3.0 at 43k IOPS load - https://megous.com/dl/tmp/caf84c98b0a67db8.png https://megous.com/dl/tmp/caf84c98b0a67db8.png It's probably not yet limited by the CPU, but close. This is much slower (than RPi4) Orange Pi 3.