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 -----Original Message----- From: Simh [mailto:simh-boun...@trailing-edge.com] On Behalf Of gérard Calliet Sent: Wednesday, March 6, 2019 1:11 PM To: Pontus Pihlgren <pon...@update.uu.se> Cc: simh@trailing-edge.com Subject: EXT :Re: [Simh] some performance issues 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(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 hard to > optimize for. > > /P > > On Tue, Mar 05, 2019 at 03:13:53PM +0100, 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 VAX we are running processes CPU intensive (old Ada >> compiler), they take 100% of the CPU, also very few page fault, very >> few IO. >> >> And the CPU time is about 2 or 3 times the CPU time on the hardware, >> and so elapsed time 3 or 4 times. (For my understanding, it is >> difficult to think the same stream of instructions can use different >> CPU times between hardware and SIMH). >> >> Where can I do something to improve performance? Are there parameters >> (or constant in compilation) in SIMH which could help? >> And the specific context is processes doing almost only CPU >> computing. >> >> >>>>>> my configuration, and what commit I use >> on error continue >> load -r ka655x.bin >> attach NVR ka655.nvr >> set cpu 512m >> set cpu conhalt >> set RL disable >> set LPT disable >> set TQ disable >> set -L rq0 rauser=18000000 >> attach rq0 datauser2.dsk >> set xq mac=08-00-2B-3C-96-75 >> attach xq eth0 >> dep bdr 0 >> b cpu >> >> >> $ run vax-i64 >> MicroVAX 3900 simulator V4.0-0 Beta git commit id: 8810571d >> sim> >> >> >> Thanks, >> >> Gérard Calliet >> >> _______________________________________________ >> Simh mailing list >> Simh@trailing-edge.com >> http://mailman.trailing-edge.com/mailman/listinfo/simh _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
