LPAR CPU capacity planning Post: 302806745

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Operating Systems AIX LPAR CPU capacity planning Post 302806745 by MichaelFelt on Monday 13th of May 2013 02:40:07 PM

05-13-2013

Registered User

I do not think this is going to give you a statistic you really want, but I may be mistaken - as it all depends on what you are trying to "relate" to/with each other.

The physc ($PC) value is already "relative" in the sense that you are computing it (I think) because it is an expression of the processing milliseconds used for the time period (9.1 means 91 msec per 10 msec - which is the PHYP real-time scheduling window - entitlement is guaranteed processing - if requested -, in real terms: (EC * 10) msec per 10 msec.

So if I use 91 msec - that might be 10 processors (9 running non-stop for 10msec, and one (the tenth) running only 1msec, or it could be 91 processors all running only 1 msec.

Looking at user/sys time and comparing them to physc could make sense on Power6 and earlier - where one thread running user+sys = 100 could equal physc = 1.0, but on POWER7 a single thread is considered to only be 0.66 of 1.0 while the other three threads (logical cpu 1,2,3 = even though idle is 100% are considered to be "using" .11 physc each - because there are additional processing components on a Power7 that, by definition, are not being used. In other words, it is impossible for a single thread to fully utilize a POWER7 processor potential.

In short, I think the statistic to use is just physc. You could perhaps give it a weight by multiplying it by lbusy% - but this depends on what you are trying to make "standardized".

Hope this helps (i.e. is understandable)!

Michael

MichaelFelt

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lockward

lockward(6x)							XScreenSaver manual						      lockward(6x)

NAME

       lockward - Rotating spinning color-cycling things

SYNOPSIS

       lockward  [-display  displayspec]  [-root]  [-window]  [-visual	arg]  [-window-id  arg]  [-delay usec] [-pair] [-fps] [-blink | -no-blink]
       [-rotateidle-min msec] [-rotateidle-max msec] [-blinkidle-min msec] [-blinkidle-max msec] [-blinkdwell-min msec] [-blinkdwell-max msec]

DESCRIPTION

       lockward draws a spinning, rotating set of notched wheels overlaid with some flashing effects, using OpenGL.  It's a sort of cross  between
       the wards in a combination lock and those old information displays that animated via polarized light.

OPTIONS

       -visual visual
	       Specify which visual to use.  Legal values are the name of a visual class, or the ID number (decimal or hex) of a specific visual.

       -window Draw on a newly-created window (default).

       -root   Draw on the root window.

       -delay microseconds
	       Per-frame delay, in microseconds.  Default: 20000 (50 frames/sec).

       -blink | -no-blink
	       Enables/disables the blinking effects.  Default: Enabled.

       -fps    Display the current frame rate, CPU load, and polygon count.

       -rotateidle-min milliseconds

       -rotateidle-max milliseconds
	       The minimum and maximum time each spinner will sit idle, in milliseconds.  Defaults: Min 1000, max 6000.

       -blinkidle-min milliseconds

       -blinkidle-max milliseconds
	       The minimum and maximum time between blinking effects, in milliseconds.	Defaults: Min 1000, max 9000.

       -blinkdwell-min milliseconds

       -blinkdwell-max milliseconds
	       The minimum and maximum dwell time for the blinking effects, in milliseconds.  This affects how quickly the blinks actually happen.
	       Defaults: Min 100, max 600.

ENVIRONMENT

       DISPLAY Default host and display number.

       XENVIRONMENT
	       Name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.

SEE ALSO

       X(1), xscreensaver(1)

AUTHORS

       Leo L. Schwab <ewhac@best.com>

X Version 11							5.15 (28-Sep-2011)						      lockward(6x)