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Full Discussion: LPAR CPU capacity planning
Operating Systems AIX LPAR CPU capacity planning Post 302803733 by gsaray101 on Tuesday 7th of May 2013 09:31:23 AM
Old 05-07-2013
LPAR CPU capacity planning

Hi Everybody:

I am trying to come up with a formula to calculate the threshold for LPAR cpu utilization in a shared mode. It sounds like I need to calculate the Relative Virtual CPU and then try to calculate the cpu utilzation. Given the following lparstat output:

Code:
System configuration: type=Shared mode=Uncapped smt=4 lcpu=96 mem=393216MB psize=64 ent=16.00 
%user  %sys  %wait  %idle physc %entc  lbusy   app  vcsw phint
----- ----- ------ ------ ----- ----- ------   --- ----- -----
 35.4  15.0   11.1   38.5  9.18  57.4   30.2 36.58 25199  3727 
 36.4  15.6   11.3   36.7  9.41  58.8   31.1 35.56 24301  4129 
 43.2  18.6   13.1   25.1 11.28  70.5   35.0 32.56 30371  5777 
 41.4  17.0   13.2   28.3 10.75  67.2   32.8 33.34 30306  5116 
 35.4  15.0   11.3   38.3  9.21  57.6   29.5 35.85 26479  3758

How would I calculate the CPU threshold for an LPAR in share more?

Last edited by Scott; 05-07-2013 at 10:37 AM.. Reason: Please use code tags
 

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cpufreq-set(1)															    cpufreq-set(1)

NAME
cpufreq-set - A small tool which allows to modify cpufreq settings. SYNTAX
cpufreq-set [options] DESCRIPTION
cpufreq-set allows you to modify cpufreq settings without having to type e.g. "/sys/devices/system/cpu/cpu0/cpufreq/scaling_set_speed" all the time. OPTIONS
-c --cpu <CPU> number of CPU where cpufreq settings shall be modified. -d --min <FREQ> new minimum CPU frequency the governor may select. -u --max <FREQ> new maximum CPU frequency the governor may select. -g --governor <GOV> new cpufreq governor. -f --freq <FREQ> specific frequency to be set. Requires userspace governor to be available and loaded. -r --related modify all hardware-related CPUs at the same time -h --help Prints out the help screen. REMARKS
Omitting the -c or --cpu argument is equivalent to setting it to zero. The -f FREQ, --freq FREQ parameter cannot be combined with any other parameter except the -c CPU, --cpu CPU parameter. FREQuencies can be passed in Hz, kHz (default), MHz, GHz, or THz by postfixing the value with the wanted unit name, without any space (fre- quency in kHz =^ Hz * 0.001 =^ MHz * 1000 =^ GHz * 1000000). On Linux kernels up to 2.6.29, the -r or --related parameter is ignored. FILES
/sys/devices/system/cpu/cpu*/cpufreq/ /proc/cpufreq (deprecated) /proc/sys/cpu/ (deprecated) AUTHORS
Dominik Brodowski <linux@brodo.de> - author Mattia Dongili<malattia@gmail.com> - first autolibtoolization SEE ALSO
cpufreq-info(1) Mattia Dongili 0.1 cpufreq-set(1)
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