Re: [OT] A64Fx was: ISO: The Eiffel OO programming language and IDE, on VMS

On Thu, 27 Mar 2025 11:34:16 +0200, Michael S wrote:

On Wed, 26 Mar 2025 23:53:14 -0000 (UTC)
Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
 

On Wed, 26 Mar 2025 23:45:54 +0200, Michael S wrote:
 

Top performing Arm CPUs are designed in USA.
1. Cupertino, California (Apple)
2. Raleigh, North Carolina (Qualcomm)
3. Austin, Texas (Arm Inc)

 
All outclassed by Fujitsu’s A64FX, as used in the Fugaku machine, and
successors -- designed in Japan.

 
That's very OT in comp.os.vms, but I'd write it anyway. A64FX did not
outclass any of mentioned above.
 
A64FX is good chips for its intended applications, i.e. massively
parallel supercomputers. Its most important feature is Tofu comm links
that together with Tofu switches allow high-bandwidth communication
between tens of thousands of nodes with the latency that is not exactly
low, but can be called acceptable. It's second important feature is
built-in connection to HBM2 memory. Its third important feature is
rather good floating-point throughput when the application amenable to
vectorizing. Its fourth important feature is that said good throughput
is achieved without consuming too much power.

All of which adds up to greater performance than any of those other chips
could manage. None of those others could offer hardware in the same
league. That’s the point.

The Fugaku super was number one on the Top500 list for two years straight.
And now, getting on to 5 years after its introduction, it still manages to
stay in the top 10.

<https://top500.org/system/179807/>