Hello,
Thanks for all the answers. I do a grouped answer.
First:
MicroVAX 3900 simulator V4.0-0 Beta git commit id: 8810571d
sim> show version
MicroVAX 3900 simulator V4.0-0 Beta
Simulator Framework Capabilities:
64b data
64b addresses
Ethernet support
Idle/Throttling support is available
Virtual Hard Disk (VHD) support
Asynchronous I/O support
Host Platform:
Compiler: DEC C 7.3-289
Simulator Compiled: Dec 4 2013 at 15:29:58
Memory Access: Little Endian
Memory Pointer Size: 32 bits
Large File (>2GB) support
OS clock tick size: 1ms
OS: OpenVMS I64 V8.4
git commit id: 8810571d
Next (technical):
* [Hittner] Memory disk (LD) : I think about it, but I see the compiler
doesn't do much IO itself (seen in the emulated VAX). But about 100% of CPU.
It seems it is simh itself (on the Itanium host) which does huge number
of IO to do its cpu job.
I will test also the memory disk.
I thought that perhaps installing the simh image should help, but I
cannot see any paging on the process running simh.
The core running simh is full used. There is however a lot of Interupt
Stack Mode activity.
* [Pizzolato,Billquist] 512m : To do that, I have a huge Working Set for
the process running simh. No paging seen.
* [Pizzolato] asynchonous I/O : I see my version support it. Is it
necessary to activate it with a parameter?
* [Khandy] set cpu_idle = VMS : I will try it.
Next (philosophy):
* [Hittner] compiler port: It is possible to port the compiler. It is an
old Ada cross compiler. The issue is we need to create exact bit and
byte images cross-compiled for 68k cpu equipments. If we port the
back-end, the images will be functionnaly equivalent, but not bit and
byte equivalent.
* [Hittner] i7 will outperform: Yes. But with VSI help, in the future,
OpenVMS will become more usable to host anything (at least for all VMS
specific hardware versions), and OpenVMS will run on standard x86
hardware. For some customers, it is very important to be able to do
anything on OpenVMS. Some projects need very long time integration
cycles, and OpenVMS is about the only OS which yet knows about strong
backward compatibility. And with VSI new company, we can see at least
ten years of availibility in the future. So I want to be able to do
anything on some projects only on OpenVMS, if possible. simh on OpenVMS
here can do the work, because it seems the tuning for only a compiler is
possible. And the need for pure VAX is only a few part of the global
project.
Thanks,
Gérard Calliet
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