Re: [Simh] some performance issues

2019-03-06 Thread Henry Bent
On Tue, 5 Mar 2019 at 09:14, gérard Calliet wrote: > Hello, > > Again I have some performance issues with simh. > > I built it on OpenVMS Itanium. It runs on a process with enought > memory, it takes 1 of the 8 CPU Itanium with 100%, no page faults, and > 100 BIO by second. > > On the emulated V

Re: [Simh] some performance issues

2019-03-06 Thread gérard Calliet
Hi, We had a VAX Station 4000-90 128M Memory. We have a RX28000 9520 8G Memory. Gérard Calliet Le 06/03/2019 à 10:57, Pontus Pihlgren a écrit : Hi I'm having trouble understanding your question. Are you comparing CPU-time of a real VAX(which model?) to emulated CPU-time on an Itanium machine

Re: [Simh] some performance issues

2019-03-06 Thread gérard Calliet
The reason was "you can do everything with 2 OpenVMS/Itanium boxes" (they are Itanium I4) Gérard Calliet Le 06/03/2019 à 16:54, Zane Healy a écrit : I have to wonder if a lightweight Linux disto, that has been locked down, running on a Core i7 might not give better SIMH performance. My *old*

Re: [Simh] some performance issues

2019-03-06 Thread Zane Healy
I have to wonder if a lightweight Linux disto, that has been locked down, running on a Core i7 might not give better SIMH performance. My *old* i7 ESXI box provides a faster “VAX” than my VAXstation 4000/60. What is the reason for running on Itanium? Zane > On Mar 6, 2019, at 1:57 AM, Pontu

Re: [Simh] some performance issues

2019-03-06 Thread Pontus Pihlgren
Hi I'm having trouble understanding your question. Are you comparing CPU-time of a real VAX(which model?) to emulated CPU-time on an Itanium machine(which one?). Emulation will have an associated overhead. If you are compareing a fast VAX to an emulation on a slow Itanium... well, Itanium is

[Simh] some performance issues

2019-03-05 Thread gérard Calliet
Hello, Again I have some performance issues with simh. I built it  on OpenVMS Itanium. It runs on a process with enought memory, it takes 1 of the 8 CPU Itanium with 100%, no page faults, and 100 BIO by second. On the emulated VAX we are running processes CPU intensive (old Ada compiler), t