17 Feb
2022
17 Feb
'22
5:49 a.m.
On 2/16/22, Clem Cole <clemc(a)ccc.com> wrote:
Marketing people in particular like to grab a single
number for 'goodness'
just to try to show mine is better than yours (my current disgust has been
the clock rate of the processors which sadly, my employer was one of the
worst in using as a figure of merit).
That, and instructions/second. The IBM S/370 model 158 was a true 1
MIPS machine. The VAX-11/780 executed about 500 KIPS. But the 11/780
and the model 158 were almost a dead heat when it came to the
execution speed of real world applications. Why? Mainly because the
VAX architecture was a lot CISC-ier than S/370, which was basically a
load/compute/store architecture. The VAX got a lot more done with
each individeual instruction than the S/370.
-Paul W.