NUMA NUMA make Raspberry Pi go ZOOMA

Raspberry Pi 5 gets 10-15% speedup with 100 line Linux kernel patch. And what if we could save 50 megawatt-hours of power annually, just with a software patch for older Pis?

I'll walk through the NUMA Emulation patch that supposedly boosts Pi 5 performance, as well as some other new performance-related developments coming down the pike!

Mentioned in this video:

Pi 5 NUMA Emulation Patch: https://lore.kernel.org/lkml/20240625...
What is NUMA? https://lse.sourceforge.net/numa/faq/
x86 Fake Numa for CPUSets: https://www.kernel.org/doc/html/v5.8/...
Pi 1, 3 A+, 3 B+ S2Idle patch: https://lore.kernel.org/dri-devel/202...
Raspberry Pi 5 A2 Command Queueing thread: https://forums.raspberrypi.com/viewto...
My 2019 blog post on A2 microSD cards: https://www.jeffgeerling.com/blog/201...
Pi 5 4GB model outperforming 8GB model: https://github.com/raspberrypi/firmwa...
Overvolted Pi 5 from jonatron: https://jonatron.github.io/randomstuf...
My video on M.2 NVMe on the Pi 5:    • SBCs: It's time to ditch microSD  

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Contents:

00:00 - There's something off about Pi 5
01:27 - NUMA NUMA?
02:27 - The NUMA Emulation patch
04:29 - 50 MW of power savings (ish)
05:35 - microSD: A2 finally faster than A1
07:18 - Some Pis are slower than others
08:29 - Return of the Bloopers