> -----Original Message----- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of Hans-Joachim Picht > > It is a good idea to integrate the cached variable from > /proc/meminfo into the cpuplugd rule set. I will integrate > this functionality into the next release.
Very cool, thanks... I think that will make your tool extremely powerful. > > Can anyone explain the logic in the default > HOTPLUG/HOTUNPLUG rules? SNIP > All in all, a hotplug rule is executed (a cpu is activated) > if the load average is greater than the number of active cpus > + 0.75 *and* the idle percentage of the system is below 10 > percent. Since all the values are evaluated and in the end > the result of the rule is true or false the order of the > separate values in this example is not important. SNIP > During some tests we conducted this rule set seemed to work > best on a general purpose installation. You have to keep in > mind that you probably have to run a lot of tests to find the > perfect rule setup for your workload. I should probably not have used the word "logic" - I _do_ understand this rule principle, which I find very intuitive, simple and yet very strong. I was more the specific calculations: why exactly use 0.75 and compare loadavg with the number of CPU. Now I understand it based on your tests, which of course is perfectly legitimate. > > I'm not sure about Perfkit but IMHO CP does not care about > the dynamic guest size since this is handled between the > resource monitor and the guest operating system. > As long VM knows, that the pages in the CMM pool are free and starts using them - VM basically knows enough, yes. But for a performance analyst point of view, it would be rather nice to know how the individual guests behave. Especially when cpuplugd is in play instead of VMRM... Have a nice weekend and thanks, Klaus __________________________________________________________________________________________ KMD A/S, Lautrupparken 40-42, DK-2750 Ballerup, CVR-nr. 26911745 KMD er medlem af IT-Branchen og Dansk Erhverv samt anmeldt til Datatilsynet som edb-servicevirksomhed. KMD er certificeret i henhold til ISO 9001:2000, med Dansk Standard som certificerende organ og er desuden Microsoft Gold Certified Partner og Certificeret SAP Hosting Center. www.kmd.dk www.kundenet.kmd.dk www.e-Boks.dk www.organisator.dk www.kmdinternational.com Hvis du har modtaget denne e-mail ved en fejl, bedes du venligst give mig besked herom og slette den. If you received this e-mail by mistake, please notify me and delete it. Thank you. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
