<div dir="ltr">Just in case folks don't know, KLH10 is a standalone KL10 emulator. It has no connection to simh.<div><br></div><div>I've been able to reproduce this on two different x86 systems running current versions of linux. Open two windows, run "top" in one. In the other, assuming you're using panda-dist, start klh10, even with the default klt20.ini file (the cpu idler is defined on by default). So far, at the KLH10 prompt, all is well. Now type "go", and you'll be at the BOOT prompt, but you don't need to boot anything. Look at "top" in your other window, and you'll observe the "kn10-kl" process shoot to the top at 100% cpu utilization.</div><div>That's a problem.</div><div><br></div><div>-Mark</div><div> </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Mar 4, 2018 at 4:26 PM, Mark Abene <span dir="ltr"><<a href="mailto:phiber@phiber.com" target="_blank">phiber@phiber.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks, but I have no problem with host cpu idling in simh with the pdp11 and vax emulators.<div>The problem currently only exists in the KLH10 emulator with recent linux versions.</div><div><br></div><div>Regards,</div><div>Mark</div><div><br><div><br></div></div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Mar 4, 2018 at 3:24 PM, Boyanich, Alastair <span dir="ltr"><<a href="mailto:Alastair.Boyanich@au.fujitsu.com" target="_blank">Alastair.Boyanich@au.fujitsu.<wbr>com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-AU" link="#0563C1" vlink="#954F72">
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<p class="MsoNormal"><span>Hi Mark, <u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>I can only speak for the VAX side of things, but ymmv and possibly similar?<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>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%.<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>There was an option I used to feed it in the .ini which was:<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>SET CPU IDLE=VMS<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>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.<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span>Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span>Al Boyanich<u></u><u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><span><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> <a href="mailto:owner-hecnet@Update.UU.SE" target="_blank">owner-hecnet@Update.UU.SE</a> [mailto:<a href="mailto:owner-hecnet@Update.UU.SE" target="_blank">owner-hecnet@Update.UU<wbr>.SE</a>]
<b>On Behalf Of </b>Mark Abene<br>
<b>Sent:</b> Sunday, 4 March 2018 7:03 PM<br>
<b>To:</b> <a href="mailto:hecnet@update.uu.se" target="_blank">hecnet@update.uu.se</a><br>
<b>Subject:</b> [HECnet] KLH10 not idling host CPU<u></u><u></u></span></p><div><div class="m_-8882053043455403307h5">
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">I'm posting this here in the hopes that there are other KLH10 emulator users on HECnet.<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<div>
<p class="MsoNormal">Thanks,<u></u><u></u></p>
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<div>
<p class="MsoNormal">Mark<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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