Re: Is Intel exceptionally unsuccessful as an architecture designer?

On Mon, 23 Sep 2024 01:34:55 +0000
mitchalsup@aol.com (MitchAlsup1) wrote:

On Mon, 23 Sep 2024 0:53:35 +0000, jseigh wrote:
 

On 9/22/2024 5:39 PM, MitchAlsup1 wrote: 

 

Speaking of memory models, remember when x86 didn't have
a formal memory model.  They didn't put one in until
after itanium.  Before that it was a sort of processor
consistency type 2 which was a real impedance mismatch
with what most concurrent software used a a memory model. 

 
When only 1 x86 would fit on a die, it really did not mater
much. I was at AMD when they were designing their memory
model.
 

Joe Seigh 

Why # of CPU cores on die is of particular importance?
According to my understanding, what matters is # of CPU cores with
coherent access to the same memory+IO.
For x86, 4 cores (CPUs) were relatively common since 1996. There
existed few odd 8-core systems too, still back in the last century.