[Info-vax] VUPS.COM relevance for modern CPUs

[Volker Halle]

Mark,

on my Intel i5-9600K @3.7 GHz with 6 Cores, Windows 10 Pro 22H2 with VMware Player 16, running my VUPS.COM reports about 730 VUPS with VSI OpenVMS x86-64 V9.2 with 2 vCPUs.

$ MONI MODE/INT=1/AVERAGE reports about 10% Kernel, 21% Exec and 51% Supervisor mode while running VUPS.COM

Running a simple LOOP.COM 

$ i=0
$loop:
$ i=i+1
$ GOTO loop

consumes 22% Kernel, 33% Exec and 45% Supervisor mode

Running the same LOOP.COM procedure on an OpenVMS V8.2 rx2600 1.3 GHz (1 CPU) consumes: 8% Kernel, 31% Exec and 61% Supervisor mode.
Running VUPS.COM on that Itanium reports about 1762 VUPS with 5% Kernel, 17% Exec and 77% Supervisor mode.

The 'CPU work' is done in Supervisor mode in a small loop in VUPS.COM, Exec and Kernel could be considered (necessary) 'overhead' and this 'overhead' is more significant on x86-64.

AFAIK VSI has not yet publicized any performance data and may still be concentrating on function vs. performance.

Volker.