On 6/4/2012 10:59 AM, Paul_Koning at Dell.com wrote:
On Jun 4, 2012, at 10:53 AM, Brian Hechinger wrote:
On 6/4/2012 10:50 AM, Paul_Koning at Dell.com wrote:
On Jun 4, 2012, at 10:14 AM, Brian Hechinger wrote:
On 6/4/2012 7:55 AM, Dave McGuire wrote:
On 06/04/2012 07:52 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
/simh/rifter/vax.ini> set cpu idle=VMS
Command not allowed
It detects the idle loop patterns in some OSs and throttles back the
simulator, so the host system isn't sitting there burning CPU to execute
the guest OS's idle loop.
Right, but I'm curious what it needs to know about the host OS to accomplish that.
I should look at the source but I'm not sure I'll know what I'm looking at. :)
See vax_cpu.c.
My copy (SIMH 3.8.1) rejects that command with a different message: "Invalid argument". But to make things even stranger, it DOES accept the command -- "show cpu idle" shows that it paid attention.
Possibly the issue is that the VAX-specific command next passes control to the general command (in sim_timer.c) and that routine accepts an argument but requires it to be an integer!
You might try simply "set cpu idle" (without argument). The default seems to be VMS, with NETBSD, OPENBSD, ULTRIX, and 32V accepted as alternate values. The difference is in what the particular OS does when it is idle. That tends to change from one OS to another (even when the hardware seems to suggest a standard way to do it, as in the PDP11 with its WAIT instruction).
Same thing:
/simh/rifter/vax.ini> set cpu idle
Command not allowed
-brian
Looks like you'll have to read the Fine Code to see what changed.
paul
Looks like there were some changes to IDLE for the VAX in 3.9
building that now.
-brian
On 6/4/2012 11:00 AM, Dave McGuire wrote:
On 06/04/2012 10:14 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
/simh/rifter/vax.ini> set cpu idle=VMS
Command not allowed
Oh my. I assume that's done by a #define somewhere. Have you looked?
Yes. The code is a little.............. tricky to follow.
I don't think I'm going to be able to sort this out. I just don't have the time it'll take to go through all his code. :(
-brian
On 06/04/2012 10:14 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
/simh/rifter/vax.ini> set cpu idle=VMS
Command not allowed
Oh my. I assume that's done by a #define somewhere. Have you looked?
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On Jun 4, 2012, at 10:53 AM, Brian Hechinger wrote:
On 6/4/2012 10:50 AM, Paul_Koning at Dell.com wrote:
On Jun 4, 2012, at 10:14 AM, Brian Hechinger wrote:
On 6/4/2012 7:55 AM, Dave McGuire wrote:
On 06/04/2012 07:52 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
/simh/rifter/vax.ini> set cpu idle=VMS
Command not allowed
It detects the idle loop patterns in some OSs and throttles back the
simulator, so the host system isn't sitting there burning CPU to execute
the guest OS's idle loop.
Right, but I'm curious what it needs to know about the host OS to accomplish that.
I should look at the source but I'm not sure I'll know what I'm looking at. :)
See vax_cpu.c.
My copy (SIMH 3.8.1) rejects that command with a different message: "Invalid argument". But to make things even stranger, it DOES accept the command -- "show cpu idle" shows that it paid attention.
Possibly the issue is that the VAX-specific command next passes control to the general command (in sim_timer.c) and that routine accepts an argument but requires it to be an integer!
You might try simply "set cpu idle" (without argument). The default seems to be VMS, with NETBSD, OPENBSD, ULTRIX, and 32V accepted as alternate values. The difference is in what the particular OS does when it is idle. That tends to change from one OS to another (even when the hardware seems to suggest a standard way to do it, as in the PDP11 with its WAIT instruction).
Same thing:
/simh/rifter/vax.ini> set cpu idle
Command not allowed
-brian
Looks like you'll have to read the Fine Code to see what changed.
paul
On 6/4/2012 10:50 AM, Paul_Koning at Dell.com wrote:
On Jun 4, 2012, at 10:14 AM, Brian Hechinger wrote:
On 6/4/2012 7:55 AM, Dave McGuire wrote:
On 06/04/2012 07:52 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
/simh/rifter/vax.ini> set cpu idle=VMS
Command not allowed
It detects the idle loop patterns in some OSs and throttles back the
simulator, so the host system isn't sitting there burning CPU to execute
the guest OS's idle loop.
Right, but I'm curious what it needs to know about the host OS to accomplish that.
I should look at the source but I'm not sure I'll know what I'm looking at. :)
See vax_cpu.c.
My copy (SIMH 3.8.1) rejects that command with a different message: "Invalid argument". But to make things even stranger, it DOES accept the command -- "show cpu idle" shows that it paid attention.
Possibly the issue is that the VAX-specific command next passes control to the general command (in sim_timer.c) and that routine accepts an argument but requires it to be an integer!
You might try simply "set cpu idle" (without argument). The default seems to be VMS, with NETBSD, OPENBSD, ULTRIX, and 32V accepted as alternate values. The difference is in what the particular OS does when it is idle. That tends to change from one OS to another (even when the hardware seems to suggest a standard way to do it, as in the PDP11 with its WAIT instruction).
Same thing:
/simh/rifter/vax.ini> set cpu idle
Command not allowed
-brian
On Jun 4, 2012, at 10:14 AM, Brian Hechinger wrote:
On 6/4/2012 7:55 AM, Dave McGuire wrote:
On 06/04/2012 07:52 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
/simh/rifter/vax.ini> set cpu idle=VMS
Command not allowed
It detects the idle loop patterns in some OSs and throttles back the
simulator, so the host system isn't sitting there burning CPU to execute
the guest OS's idle loop.
Right, but I'm curious what it needs to know about the host OS to accomplish that.
I should look at the source but I'm not sure I'll know what I'm looking at. :)
See vax_cpu.c.
My copy (SIMH 3.8.1) rejects that command with a different message: "Invalid argument". But to make things even stranger, it DOES accept the command -- "show cpu idle" shows that it paid attention.
Possibly the issue is that the VAX-specific command next passes control to the general command (in sim_timer.c) and that routine accepts an argument but requires it to be an integer!
You might try simply "set cpu idle" (without argument). The default seems to be VMS, with NETBSD, OPENBSD, ULTRIX, and 32V accepted as alternate values. The difference is in what the particular OS does when it is idle. That tends to change from one OS to another (even when the hardware seems to suggest a standard way to do it, as in the PDP11 with its WAIT instruction).
paul
On 6/4/2012 7:55 AM, Dave McGuire wrote:
On 06/04/2012 07:52 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
/simh/rifter/vax.ini> set cpu idle=VMS
Command not allowed
It detects the idle loop patterns in some OSs and throttles back the
simulator, so the host system isn't sitting there burning CPU to execute
the guest OS's idle loop.
Right, but I'm curious what it needs to know about the host OS to accomplish that.
I should look at the source but I'm not sure I'll know what I'm looking at. :)
-brian
You paged??? I've been flat out lately. Sorry.
What's up? I will be around all day today.
-Steve
-----Original Message-----
From: owner-hecnet at Update.UU.SE
[mailto:owner-hecnet at Update.UU.SE] On Behalf Of Mark Benson
Sent: Sunday, June 03, 2012 15:41
To: hecnet at Update.UU.SE
Subject: [HECnet] Paging: Steve Davidson
I'm trying to get in touch with Steve, is he around at the
moment? I e-mailed his address a while back but got no response.
--
Mark Benson
http://DECtec.info
Twitter: @DECtecInfo
HECnet: STAR69::MARK
Online Resource & Mailing List for DEC Enthusiasts.
On 06/04/2012 07:52 AM, Brian Hechinger wrote:
Anyone know how it works? I'd really like to get it working on Solaris.
You mean it doesn't? I wonder why that would be.
It detects the idle loop patterns in some OSs and throttles back the
simulator, so the host system isn't sitting there burning CPU to execute
the guest OS's idle loop.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
