Linux Patches Updated For Better Power Management On AMX "Sapphire Rapids" Servers

[phoronix]

Phoronix: Linux Patches Updated For Better Power Management On AMX "Sapphire Rapids" Servers

While the kernel-side Intel AMX support landed in Linux 5.16 and KVM support for AMX in Linux 5.17, other Linux patches around Advanced Matrix Extensions (AMX) remain floating around. One important patch-set was updated this week for ensuring proper power management on AMX-enabled processors, coming with Xeon Scalable "Sapphire Rapids" this year...

https://www.phoronix.com/scan.php?page=news_item&px=Intel-AMX-Better-PM-Patches

[Linuxxx]

It's a bit surprising though that this rather significant patch series wasn't mainlined already as part of the earlier AMX enablement.

From the article it sounds like a workaround for buggy hardware that just taped out...

Anyway, AMX will probably never hit consumer platforms anyway, since we are talking about 8192 bits wide registers here, whereas AVX-512 is already causing throttling at full-width.
(Thankfully, RPCS3 allows to make use of AVX-512 as 2 × 256 bits [EVEX], thus having your cake & getting around to eating it, too!)

[WannaBeOCer]

From the article it sounds like a workaround for buggy hardware that just taped out...

Anyway, AMX will probably never hit consumer platforms anyway, since we are talking about 8192 bits wide registers here, whereas AVX-512 is already causing throttling at full-width.
(Thankfully, RPCS3 allows to make use of AVX-512 as 2 × 256 bits [EVEX], thus having your cake & getting around to eating it, too!)

What type of throttling issues are you running into with AVX-512? With the compute workloads we run we’ve noticed reduced power usage and heat compared to AVX2 while providing much better performance.