🚀 go-pugleaf

In article <1992Nov17.012550.7243@oakhill.sps.mot.com> dannyj@oakhill.sps.mot.com (Danny K. Jain) writes:
>I think that the reason that Alpha has more Specmarks that HP, even if both
>were at the same clock frequency, is because Alpha is a 2-issue machine while
>the HP is a single issue machine.

Not! HP is a 2-issue machine tuned for floating-point computations.
It can do among other combinations:

	a) ld/st fp   and   fadd, fsub, fmpyadd, etc.
	b) ALU	      and   fadd, fsum, fmpyadd, etc.

What it does *not* do is:

	a) ALU	      and   load/store integer
	b) ALU	      and   ALU

That's the main reason why integer performance in relation
to the clock frequency is low, i.e. 80 SPECint92 at 99 MHz.
A full dual-issue machine allowing ALU+ALU and ALU+ld/st
with the same characteristics as the HP machine (especially
the cache latency and sizes) would show something around
a one-to-one ratio between SPECint92 and MHz
(e.g. 100 SPECint92 at 100 MHz).

- Marc Tremblay.
Sun Microsystems