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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>True, but the current idling logic in the VAX simulators should detect and be well behaved under all available versions of VMS as well as when sitting idle at the console boot rom prompt (>>>).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Sergey suggest that the problem may be related to too large a host OS clock tick. This turns out not to be the case either.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Priya sent me the following SHOW VERSION output:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><i>MicroVAX 3900 simulator V4.0-0 Beta</i><o:p></o:p></p><p class=MsoNormal><i> Simulator Framework Capabilities:</i><o:p></o:p></p><p class=MsoNormal><i> 64b data</i><o:p></o:p></p><p class=MsoNormal><i> 64b addresses</i><o:p></o:p></p><p class=MsoNormal><i> Ethernet support</i><o:p></o:p></p><p class=MsoNormal><i> Idle/Throttling support is available</i><o:p></o:p></p><p class=MsoNormal><i> Virtual Hard Disk (VHD) support</i><o:p></o:p></p><p class=MsoNormal><i> RAW disk and CD/DVD ROM support</i><o:p></o:p></p><p class=MsoNormal><i> Asynchronous I/O support</i><o:p></o:p></p><p class=MsoNormal><i> Host Platform:</i><o:p></o:p></p><p class=MsoNormal><i> Compiler: GCC 4.7.2 20121109 (Red Hat 4.7.2-8)</i><o:p></o:p></p><p class=MsoNormal><i> Simulator Compiled: Nov 5 2013 at 15:19:27</i><o:p></o:p></p><p class=MsoNormal><i> Memory Access: Little Endian</i><o:p></o:p></p><p class=MsoNormal><i> Memory Pointer Size: 32 bits</i><o:p></o:p></p><p class=MsoNormal><i> Large File (>2GB) support</i><o:p></o:p></p><p class=MsoNormal><i> OS clock tick size: 2ms</i><o:p></o:p></p><p class=MsoNormal><i> OS: Linux localhost.localdomain 3.6.10-4.fc18.i686.PAE #1 SMP Tue Dec 11 18:15:08 UTC 2012 i686 i686 i386 GNU/Linux</i><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><i> git commit id: 32b8f063</i><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The OS clock tick size of 2 is the same as on my FC18 test system.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I also received a copy of the config file that is being used. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I responded with the following:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Your vax.ini file doesn’t have a “SET CPU IDLE” command. Once that command has been issued, idle detection may take up to 20 seconds before the running simulator’s clock calibration will allow idling. Normally this 20 seconds would happen during the boot of the simulated system and not be noticed. Clearly idling will ONLY be noticed on the host system when the guest system is actually idling. What operating system (and version) is running on the guest? How do you know the guest system is actually idle?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>We’ll see what comes back….<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo3'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Mark<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Hittner, David T (IS) [mailto:david.hittner@ngc.com] <br><b>Sent:</b> Friday, January 24, 2014 12:43 PM<br><b>To:</b> Mark Pizzolato - Info Comm; Priya Chincholikar; simh@trailing-edge.com<br><b>Subject:</b> RE: [Simh] Reduce CPU usage<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>And what version of VMS are you running? Different versions of VMS have different idle characteristics..<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:simh-bounces@trailing-edge.com">simh-bounces@trailing-edge.com</a> [<a href="mailto:simh-bounces@trailing-edge.com">mailto:simh-bounces@trailing-edge.com</a>] <b>On Behalf Of </b>Mark Pizzolato - Info Comm<br><b>Sent:</b> Friday, January 24, 2014 8:26 AM<br><b>To:</b> Priya Chincholikar; <a href="mailto:simh@trailing-edge.com">simh@trailing-edge.com</a><br><b>Subject:</b> EXT :Re: [Simh] Reduce CPU usage<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Priya,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>This is one of those “it works for me” cases. Idling works fine for a VMS guest on my fc18 x86 test system.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>What is the output of “SHOW VERSION” done at the “sim>” prompt?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>What does your configuration file look like?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Mark<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:simh-bounces@trailing-edge.com">simh-bounces@trailing-edge.com</a> [<a href="mailto:simh-bounces@trailing-edge.com">mailto:simh-bounces@trailing-edge.com</a>] <b>On Behalf Of </b>Priya Chincholikar<br><b>Sent:</b> Friday, January 24, 2014 3:40 AM<br><b>To:</b> <a href="mailto:simh@trailing-edge.com">simh@trailing-edge.com</a><br><b>Subject:</b> [Simh] Reduce CPU usage<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The cpu usage while running the emulator is shown as 97% to 99%. Is there a way to reduce this?<o:p></o:p></p></div><div><p class=MsoNormal>And I tried setting the cpu idle but no use. CPU utilization is still high.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal><i>sim> show cpu</i><o:p></o:p></p></div><div><p class=MsoNormal><i>CPU idle disabled, model=VAXServer 3900 (KA655), NOAUTOBOOT</i><o:p></o:p></p></div><div><p class=MsoNormal><i> 64MB, HALT to console</i><o:p></o:p></p></div><div><p class=MsoNormal><i>sim> SET CPU IDLE=VMS</i><o:p></o:p></p></div><div><p class=MsoNormal><i>sim> show cpu</i><o:p></o:p></p></div><div><p class=MsoNormal><i>CPU idle=VMS, idle enabled, model=VAXServer 3900 (KA655), NOAUTOBOOT</i><o:p></o:p></p></div><div><p class=MsoNormal><i> 64MB, HALT to console</i><o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Host OS used is Linux. fc18. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal>Priya <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></body></html>