LPAR CPU capacity planning Post: 302804371

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Operating Systems AIX LPAR CPU capacity planning Post 302804371 by MichaelFelt on Wednesday 8th of May 2013 12:54:35 PM

05-08-2013

Registered User

lbusy gives you the relative number of "logical" cpus busy. Since you are smt4 your have 96/4 virtual processors - 24 virtual (i.e. maximum physical processors at any moment).

Since your entitlement is 16 - the PHYP has reserved (declared as Home) two sockets of 8 cores each. The 8 extra virtual processors will run, ideally, on these home processors.

16 entitlement == 160 msec processing power every 10 msec guaranteed.

phsyc * 10 = # msec actually used (not processors!)
lbusy * 96 = average number of threads busy; if this number is nearly equal to physc, then you are running, mainly, single-threaded and you could easily reduce the number of VP assigned (to 'force' more utilization from a single processor (i.e., lbusy goes up faster than physc).

Hope this helps (I have to run to dinner Smilie

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MichaelFelt

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LEARN ABOUT CENTOS

cpu

CPU(8)                                                        System Manager's Manual                                                       CPU(8)

NAME

       cpu - A tool for user and group administration

SYNOPSIS

       cpu [OPTIONS]

DESCRIPTION

       CPU is a tool for user administration, that was initially based on FreeBSD's pw(8). This tool will allow you to administer users and groups
       on several different backends currently including LDAP and flat files. Please see the website http://cpu.sourceforge.net for more  informa-
       tion, or help improve the man page.

OPTIONS

       There are two kinds of options; options for CPU and options for CPU modules.  There are only four options for CPU, they are as follows:

       -C configfile, --config configfile
              The configuration file to be used by CPU. The options in this file are used for CPU modules.

       -h, --help
              Display help for CPU. If specified in conjunction with the -m option the help for that particular module is displayed.

       -M method, --method=method
              This  is  the method of administration. Current options are ldap or passwd (passwd is not yet working). This can be specified in the
              configuration file.

       -V, --version
              Display the version of the software.

SEE ALSO

       cpu.conf(5) cpu-ldap(8)

AUTHORS

       Blake Matheny <bmatheny@purdue.edu>

       The current version of this software is always availabe at http://cpu.sourceforge.net

BUGS

       To report a bug or problem, please e-mail:

       cpu-users@lists.sourceforge.net

TODO

       See TODO file that accompanied software. Please e-mail us with any additional suggestions.

                                                                 17 February 2003                                                           CPU(8)