RSS of prstat vs RSS of PS Post: 302915456

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Operating Systems Solaris RSS of prstat vs RSS of PS Post 302915456 by Perderabo on Wednesday 3rd of September 2014 07:31:39 AM

09-03-2014

Administrator Emeritus

Things are changing all the time. If you run prstat then you run ps you get two differtent snapshots of memory. Even if you run them more or less simultaneously they will not examine the processes in perfect lockstep.

Now consider that a user is running 10 different processes which are 10 different programs. However all 10 were written in C and all 10 use the standard C library and the C I/O library. These libraries are mapped into all 10 ten processes. But they are shared libraries. Only one copy actually resides in core. That single copy is counted in the RSS of all 10 processes. Now one of the 10 suddenly wants to call, let's say, strncpy() but the code for that is not currently in core. So it page faults its way in. That increases the RSS of all 10 processes even though 9 of the 10 may currently be asleep.

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LEARN ABOUT DEBIAN

busyspheres

RSS Other Screensaver(1)				      General Commands Manual					  RSS Other Screensaver(1)

NAME

       busyspheres - particle spheres.

SYNOPSIS

       busyspheres [--root/-r] [--maxfps/-x number] [--vsync/-y number] [--dpms/-M number]

DESCRIPTION

       Spheres made of dancing particles.

       Ported to Linux by Tugrul Galatali.

OPTIONS

       --root  Draw on the root window.

       --maxfps number
	       Set maximum frame rate.

       --vsync number
	       Limit redraws to specified number of vertical refreshes.  0 - 100.  Default: 1

       --dpms number
	       Stop rendering new frames if the display is not on.  0 - 1.  Default: 1

ENVIRONMENT

       DISPLAY to get the default host and display number.

SEE ALSO

       X(1),

COPYRIGHT

       Copyright (C) 2002 by <hk@dgmr.nl> and Tugrul Galatali.

       BusySpheres  is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as pub-
       lished by the Free Software Foundation.

       BusySpheres is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABIL-
       ITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

AUTHOR

       <hk@dgmr.nl> and Tugrul Galatali <tugrul@galatali.com>

X Version 11														  RSS Other Screensaver(1)

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