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OpenVMS Hobbyist Program | Alpha Systems Forums | FreeAXP
Author standby/resume - clock fast until caught up
Hein
Member

Posts: 15
Joined: 02.02.07
Posted on February 28 2011 06:55
Just an observation...

I frequently put my workstation in standby and resume.
OpenVMS running on FreeAXP typically survives this great, except for the network.

In general, just hit a return on the console and there is the next prompt.
This morning I noticed my box running hot, and it was FreeAXP.
A simple monitor mode reacted odd... not waiting at all it seemed.
Monitor/int=100 brought it under control... refreshing every few seconds.
Using simple manual timing I noticed the clock was ticking /adjusted at about 200 seconds every 10 second! That's good for 15% interrupt time, 6% kernel according to monitor.
All the while the clock was 'behind' real time.
On a hunch I let it catch up with the real time and sure enough it started to behave normally once it was back in sync.
Manually setting the time backwards did not cause a repeat.

[ XP-sp2, Pentium-D 3.0 Ghz, FreeAXP x86 version 1.1.0.307 (Sep 6 2010 13:39:22) OpenVMS 8.3, TCPIP 5.6, RDB 7.2, Datatrieve... ]

fwiw,
Hein


Hein van den Heuvel
HvdH Performance Consulting
firstnamelastname.gmail.com
Author RE: standby/resume - clock fast until caught up
Hein
Member

Posts: 15
Joined: 02.02.07
Posted on September 16 2011 17:49
Now running 2.0-377
Unlike before VMS no longer seems to continue after sleep+wake. :-(.
Too bad, I liked that.. even if it was a little quirky and the network did not survive going to sleep.

Hein


Hein van den Heuvel
HvdH Performance Consulting
firstnamelastname.gmail.com
Author RE: standby/resume - clock fast until caught up
Hein
Member

Posts: 15
Joined: 02.02.07
Posted on September 20 2011 00:35
Actually, I might not have been patient enough.
At works after all

After an overnight pause, i resumed, and did not get a response in the console terminal window.
I tried to connect a fresh Putty session to localhost 9000 which gave a freeaxp header but no more.
But when I looked back a few minutes later, all my carriage-returns were acted upon. Maybe it was 'catching up' on the sleep time?
Hein.


Hein van den Heuvel
HvdH Performance Consulting
firstnamelastname.gmail.com
Author RE: standby/resume - clock fast until caught up
Hein
Member

Posts: 15
Joined: 02.02.07
Posted on February 10 2012 05:21
It is not a really big deal, but I would love to somehow be able to continue OpenVMS after a Reasume from Pause for the host (Windows) OS.
It is really close: OpenVMS itself continues just fine, accessible from the console which already helps me some.
But the network does not come back.
A simple TCIP stop / restart would be great, but that does not fix it (for my OpenVPN loopback based network config)
I need to
- fully stop FreeAXP (>>>exit
exit: No such command :-)
- C:\>net stop msipcap
The Migration Specialties Network driver (PCAP NDIS 5.0) service is stopping...
The Migration Specialties Network driver (PCAP NDIS 5.0) service was stopped successfully.
C:\>net start msipcap
The Migration Specialties Network driver (PCAP NDIS 5.0) service was started successfully.
- Now start FreeAXP and re-boot OpenVMS

I am very grateful for that already,
but I am still hoping/wishing that someone figured out a way to get the network going without having to reboot.

Thanks!
Hein




Hein van den Heuvel
HvdH Performance Consulting
firstnamelastname.gmail.com
Author RE: standby/resume - clock fast until caught up
Bruce Claremont
Moderator

Posts: 498
Joined: 07.01.10
Posted on February 13 2012 09:51
This is on our "nice to add in our spare time" list. When Windows hibernates it breaks the link between the emulator and the network driver. The link is not automatically re-established when Windows wakes up.

On a related note, we were discussing the clock "catch-up" feature. This is primarily there to ensure the emulator "hardware clock" stays in sync with the host hardware clock. It was not designed to take laptop style usage into consideration. We were discussing having the catch-up feature ignore the large discrepancies that occur when a laptop is placed into Standby or Hibernation. If we do this, the emulator clock and VMS or Tru64 will remain at the date/time it was at when the host system paused. Is this desirable, or do you prefer to wait for the emulator to catch the time back up to the host?
Author RE: standby/resume - clock fast until caught up
Hein
Member

Posts: 15
Joined: 02.02.07
Posted on February 13 2012 15:41
>> The link is not automatically re-established when Windows wakes up.

I'd be happy with a manual work around before or after the pause.
Maybe a "net pause msipcap" or accept a "net start msipcap" to do a re-start after wake-up.

The catchup hasn't been too bad, as long as one understand what is happening. It is sort of a waste for when you don't use FreeAXP over a specific wake-up. I'd be happy do issue a manual SET TIME after un-pause when i know I'll actually use FreeAXP (which is rather often!).
I'd settle for a jump forward in time for the clock. Not sure what would break with that. Sure, T4 and similar might look ugly, but it woudl be cear something was going on. A fake catchup time period is harder to explain.
Keep up the good work! Much appreciated. Hein.




Hein van den Heuvel
HvdH Performance Consulting
firstnamelastname.gmail.com
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LouF91
April 05 2018
ah maybe they love that!

malmberg
March 24 2018
Probably. More people hang out on the comp.os.vms newsgroup.

vaxpert
March 23 2018
I have a PE42A and other Alpha system stuff for sale. I'm in So California. Any interest out there?

goodbyespy
February 27 2018
To Prohorenko. Please, visit group OpenVMS in the ok.ru

peteherrera
February 24 2018
How much does it cost to buy a complete OpenVMS hardcopy documentation set of the latest version

prohorenko
February 17 2018
Please help to obtain the license on OpenVMS

malmberg
December 12 2017
HPE only makes the most current version of OpenVMS Alpha / IA64 /VAX available to hobbyists. When I had access to the Alliance 1 program it was the same. No public downloads are allowed by HPE.

nmbonao
December 08 2017
Is anybody knows OpenVMS 8.2 version downloadable version? or CD copy? Thank you very much

aarommes
December 02 2017
Bitcoin and Blockchain enthusiasts ( plus distributed computing ) please connec / reply: http://www.openvmshobbyis
t.com/forum/viewthread.ph
p?forum_id=130&thread_id=
2991


malmberg
September 10 2017
https://sourceforge.net/p
/vms-ports/wiki/VMSInstal
lation/ For the most part just use VMS 6.1 media instead of 7.3. But why run the older release?


DoeveR
August 07 2017
Where can I find the write up on running VMS 6.1 using the simh emulator?

Bart
March 20 2017
Happy to have found my password again!

pintero
March 16 2017
peteherrera. Agreed.

peteherrera
March 04 2017
It would be nice to be able to buy the lastest hardcopy full OpenVMS docset at a very reduced price through the Hobbyist program. smiley

malmberg
February 05 2017
Decus > Connect > Encompass<Country>

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