“Linux creator Linus Torvalds had some choice words today on Advanced Vector Extensions 512 (AVX-512) found on select Intel processors,” reports Phoronix:
In a mailing list discussion stemming from the Phoronix article this week on the compiler instructions Intel is enabling for Alder Lake (and Sapphire Rapids), Linus Torvalds chimed in. The Alder Lake instructions being flipped on in GCC right now make no mention of AVX-512 but only AVX2 and others, likely due to Intel pursuing the subset supported by both the small and large cores in this new hybrid design being pursued.
The lack of seeing AVX512 for Alder Lake led Torvalds to comment:
I hope AVX512 dies a painful death, and that Intel starts fixing real problems instead of trying to create magic instructions to then create benchmarks that they can look good on.
I hope Intel gets back to basics: gets their process working again, and concentrate more on regular code that isn’t HPC or some other pointless special case.
I’ve said this before, and I’ll say it again: in the heyday of x86, when Intel was laughing all the way to the bank and killing all their competition, absolutely everybody else did better than Intel on FP loads. Intel’s FP performance sucked (relatively speaking), and it matter not one iota.
Because absolutely nobody cares outside of benchmarks.
The same is largely true of AVX512 now – and in the future…
After several more paragraphs, Torvalds reaches his conclusion. “Stop with the special-case garbage, and make all the core common stuff that everybody cares about run as well as you humanly can.”
Phoronix notes that Torvalds’ comments came “just weeks after he switched to AMD Ryzen Threadripper for his primary development rig.”
of this story at Slashdot.
Source:: Slashdot