Hello,
Thanks a lot. I'll try a new build.
I had the same test on VUPS (yes, basic DCL) with the same distribution
which runs on a window server and I got 150 VUPS. Perhaps there is
something specific about Itanium and OpenVMS there.
Another question is: are there ways of specific optimizations for CPU
intensive applications. They are doing almost only there long Ada
compilations.
I'll go back with new results.
Gérard Calliet
Le 06/03/2019 à 23:02, Mark Pizzolato a écrit :
On Wednesday, March 6, 2019 at 11:02 AM, gérard Calliet wrote:
VAX hardware 89 VUPS
SIMH 27 VUPS
Gérard Calliet
I suspect you may be using some generally available DCL procedure to
report the simulated system's VUPS. That procedure may not map very
well to the actual total system performance doing things other than
somewhat tight loops in DCL on the system. A simulator in such a tight
loop may easily have almost all of its activity hitting the host system's
CPU cache while a more natural instruction mix (as in your Ada compiler
activity) may be very different.
The simh version you are running (commit 8810571d) is 4 years and
3 months old.
Maybe you should pick up the latest from
https://github.com/simh/simh/archive/master.zip
Once you've got a recent version, you may want to try building both with
and without ASYNCH_IO.
The default IA64 builds with asynch I/O enabled. You can build without
asynch I/O with the following command:
$ MMK/MACRO=(NOASYNCH=1) vax
Let us know what you find.
- Mark
Le 06/03/2019 à 19:46, Hittner, David T [US] (MS) a écrit :
So from a performance analysis perspective, what are the VUPS ratings of
the VS4000-90 and the SIMH VAX running on the RX2800?
That's (more or less) the Integer performance rating.
David
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