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[Dawn]

ARM ST is actually pretty good these days (even outside of Apple, where it's excellent.) X1 is, for same-clock integer, about on par with Zen 3, though...

[Dawn]

V1 and friends are a long way from "simple and small" cores. V1 is, in many respects, wider than Zen3 (can sustain execution of 8 ops on mop...

[Dawn]

The x86 tax, as commonly interpreted ("in an inherent performance or efficiency disadvantage", rather than "something that may increase...

[Dawn]

I agree with you, actually - the "x86 tax" is an overblown concern. There's an underconsidered factor, IMO, which is impact of a complex ISA...

[Dawn]

Yes. A64FX has SVE. A64FX is not a V1. It does not even resemble V1 microarchitecturally, which you would know if you looked closely at either; it resembles...

[Dawn]

Fugaku (A64FX) doesn't use a Neoverse-V1 but rather a Fujitsu custom core related to the SPARC and mainframe cores they already had inhouse. It is most...

[Dawn]

But hey, first-party ARM cores do too. Links demonstrating that have been provided in this thread. "ARM IPC is so bad!!!" is demonstrably not...

[Dawn]

Based on history, May of this year is very likely for Matterhorn and its small-core friend - and shipping products around the new year....

[Dawn]

No. That's kind of what I'm saying. ARM X1 is basically Zen3-class integer ST "IPC" (I don't like that term - "iso clock performance"...

[Dawn]

Modern ARM cores are many times faster than the Pi4 processor. That is a 6-7 year old uarch running at unusually low clocks. Today's cores are 2-3x faster...

[Dawn]

Performance, already does. X1 beats current x86 cores clock for clock and competes decently core for core. Apple's numbers are higher. I've spent considerable...