Re: Clock Error

[Johnny Billquist <bqt%softjar.se@localhost>]

On 2023-12-19 15:34, Ken Wellsch wrote:
> I have been running my own build release on simh, as I am sure others may be
> doing, after seeing such encouraging news that the VAX port may finally be
> self-hostable again.  The build has not yet completed but is well along:
>
>    PID USERNAME    THR PRI NICE   SIZE    RES STATE    C   TIME    WCPU COMMAND
>   6963 sim312        1 145   10   199M   150M CPU0     0 110.6H 100.00% vax

You and me both. And it's on the third day or so for me...

> I am now onto my 5th day running on the "classic" version of simh:
>
>    VAX simulator V3.12-4
>
> to which I added the small code fragment from open-simh for NEWBSD IDLE.
>
> I did not add a network device and learned the hard way that you can't just
> leave the default time after the install because some of the build config
> fails when sanity checking the timestamps on files created.
>
> So I set the system time from my watch (which is accurate to the second).
>
> I just checked the date on the build box and compared it with another system.
>
> My desktop:  Tue Dec 19 07:59:09 EST 2023
> The Build:   Tue Dec 19 07:59:04 EST 2023

Interesting. I am running a somewhat recent simh (4.something), and it's 
*way* worse. So it would seem something was broken in the code compared 
to Bob's version. Or else it's just a question of host issues. I'm 
running under OSX...

Anyway.
Desktop:           Tue Dec 19 23:00:23 CET 2023
NetBSD under simh: Wed Dec 20 05:16:22 CET 2023

Time was originally pretty correct.

> I am running a cross-compiled copy of 10.99.10 with the last GCC patch applied:

Building 10.99.10 here, from a system currently on 10.99.7 (cross 
compiled a few days ago).

> NetBSD nb10sim312 10.99.10 NetBSD 10.99.10 (GENERIC) #1: Mon Dec 11 09:17:31 EST 2023  netbsd@z440:/home/netbsd/obj/sys/arch/vax/compile/GENERIC vax
>
> So for what it is worth, it appears I am loosing about one second per day,
> on a 100% loaded simh session, after nearly five days running.

So clearly what version of simh one is on, or possibly host, can make a 
big difference here. Yuck!

  Johnny

--
Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: bqt%softjar.se@localhost             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol