[HECnet] KLH10 not idling host CPU

[Marcin F. Michalski]

set throttle 20% ?

On Mon, Mar 5, 2018 at 12:24 AM, Boyanich, Alastair <
Alastair.Boyanich at au.fujitsu.com> wrote:

> Hi Mark,
>
>
>
> I can only speak for the VAX side of things, but ymmv and possibly similar?
>
>
>
> I’ve seen this with VMS on the VAX simulator. I think the idle loop
> detection changed a while back (perhaps on KLH10 also?) so it wasn’t
> detecting the vms idle loop correctly and thus emulating every cycle,
> driving the cpu to 100%.
>
>
>
> There was an option I used to feed it in the .ini which was:
>
>
>
> SET CPU IDLE=VMS
>
>
>
> But this has not made much of a difference for a long while. On-topic, SET
> CPU IDLE=NETBSD has worked for me. I am unsure of the reasoning.
>
>
>
> Regards,
>
> Al Boyanich
>
>
>
>
>
> *From:* owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] *On
> Behalf Of *Mark Abene
> *Sent:* Sunday, 4 March 2018 7:03 PM
> *To:* hecnet at update.uu.se
> *Subject:* [HECnet] KLH10 not idling host CPU
>
>
>
> I'm posting this here in the hopes that there are other KLH10 emulator
> users on HECnet.
>
>
>
> I've been using KLH10 with the tap patches for years and years, and idling
> has always worked fine. At some point over the recent couple of years,
> idling stopped working for me on linux (I run ubuntu 16.04.4 LTS with
> latest updates as of yesterday, on a 64-bit intel machine). My CPU is stuck
> at 100% utilization, without even starting an emulated OS (I run TOPS-20).
> In fact, as soon as I type "GO" in KLH10 and before doing anything else,
> the CPU immediately shoots to 100%. Is anyone else seeing this? In older
> versions of ubuntu/linux this didn't happen.
>
>
>
> Thanks,
>
> Mark
>
>
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