We have an LPAR defined to use .6 processors. The number of processors assigned to the LPAR had a DESIRED value of 3. We tried to run a software package licensed for 2 CPUs, and it failed since it detected 3 CPUs.
1. How does software determine the number of CPUs available?
2. Is there an AIX command that will display the number of CPUs it thinks it has?
The desired CPUs was changed to 2 in the HMC, but the package still sees 3 CPUs. Are there additional steps required to get the software in AIX to see the lower number of logical CPUs?
The hardware is a 570.
Thanks, Neal
-- Neal
Being stubborn is a virtue when you’re right - it’s only a character flaw when you’re wrong.
Neal Eckhardt <neckha...@penntraffic.nospam.com> wrote: >We have an LPAR defined to use .6 processors. The number of processors >assigned to the LPAR had a DESIRED value of 3. We tried to run a >software package licensed for 2 CPUs, and it failed since it detected >3 CPUs.
>1. How does software determine the number of CPUs available?
>2. Is there an AIX command that will display the number of CPUs it >thinks it has?
lscfg will report the number of processors.
>The desired CPUs was changed to 2 in the HMC, but the package still >sees 3 CPUs. Are there additional steps required to get the software >in AIX to see the lower number of logical CPUs?
Did you change the profile or did you reconfigure dynamically?
>Neal Eckhardt <neckha...@penntraffic.nospam.com> wrote: >>We have an LPAR defined to use .6 processors. The number of processors >>assigned to the LPAR had a DESIRED value of 3. We tried to run a >>software package licensed for 2 CPUs, and it failed since it detected >>3 CPUs.
>>1. How does software determine the number of CPUs available?
>>2. Is there an AIX command that will display the number of CPUs it >>thinks it has?
>lscfg will report the number of processors.
>>The desired CPUs was changed to 2 in the HMC, but the package still >>sees 3 CPUs. Are there additional steps required to get the software >>in AIX to see the lower number of logical CPUs?
>Did you change the profile or did you reconfigure dynamically?
>>Thanks, >>Neal >Cu >Jan
Thanks for getting back to me Jan.
It turns out the guy did not do the dynamic reconfiguration, he just changed the permanent definition (that I guess would have taken effect after AIX is rebooted).
We found the dynamic configuration, and it worked perfectly. Between 3 of us we figured it out ;)
Working with this stuff with no education is a wonderful thing.
Neal
-- Neal
Being stubborn is a virtue when you’re right - it’s only a character flaw when you’re wrong.
> It turns out the guy did not do the dynamic reconfiguration, he just > changed the permanent definition (that I guess would have taken effect > after AIX is rebooted).
I think rebooting the OS is not enough here (reboot, shutdown -Fr). Why should the HW config change on a simple OS reboot? You must power off (LPAR HW resources are returned to the hypervisor)/on (hypervisor assigns HW resources as defined in the profile to the LPAR). So shutdown (-F), when LPAR power is off, power on.
lparstat -i will give you the info you need. lscfg will report the number of virtual cpus online, this is not the same as physical cpus or logical cpus as you can carve up each cpu to a min of 0.1 and increments of 0.01, so you may want to check the licensing model for the app you are installing .. oracle for example gets licensed on the whole frame i.e. for all the physical cpus, so you can carve the system up how you like. other apps will differ.
>> It turns out the guy did not do the dynamic reconfiguration, he just >> changed the permanent definition (that I guess would have taken effect >> after AIX is rebooted).
> I think rebooting the OS is not enough here (reboot, shutdown -Fr).
Correct. You must power the partition down, then back up to put a new profile in effect.
-- Gary R. Hook ________________________________________________________________________ Vocatus atque non vocatus deus aderit
Mark Taylor wrote: > lparstat -i will give you the info you need. lscfg will report the > number of virtual cpus online, this is not the same as physical cpus > or logical cpus as you can carve up each cpu to a min of 0.1 and > increments of 0.01, so you may want to check the licensing model for > the app you are installing .. oracle for example gets licensed on the > whole frame i.e. for all the physical cpus, so you can carve the > system up how you like. other apps will differ.
Look at the _system_configuration structure in sys/systemcfg.h to see how software can get info about the system resources.
-- Gary R. Hook ________________________________________________________________________ Vocatus atque non vocatus deus aderit
On Fri, 09 Jan 2009 08:13:45 -0600, "Gary R. Hook"
<obfusc...@nospam.net> wrote: >Mark Taylor wrote: >> lparstat -i will give you the info you need. lscfg will report the >> number of virtual cpus online, this is not the same as physical cpus >> or logical cpus as you can carve up each cpu to a min of 0.1 and >> increments of 0.01, so you may want to check the licensing model for >> the app you are installing .. oracle for example gets licensed on the >> whole frame i.e. for all the physical cpus, so you can carve the >> system up how you like. other apps will differ.
>Look at the _system_configuration structure in sys/systemcfg.h to >see how software can get info about the system resources.
Thanks Gary, I looked up that header file, and it explained all.
Neal
-- Neal
Being stubborn is a virtue when you’re right - it’s only a character flaw when you’re wrong.
