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Homework and Emergencies Emergency UNIX and Linux Support Monitoring progress of a process in Linux server Post 302897460 by MarkSeger on Monday 14th of April 2014 09:02:35 AM
Old 04-14-2014
kunwar - to be clear, collectl CAN get a lot of data from /proc but as I told you earlier, not all of that information is available by process in /proc, at least not in /proc/pid where collectl gets its data.

Specifically I'm talking about your big 3: open files, system calls and process wait states. Collectl DOES report the number of system calls as reported in /proc/pid/io, but those are only for read/write I/O calls.

There is some process level info on waiting but don't think it's extensive. Furthermore collectl gets most data from stat and io, and a little from status. I've got eliminating reading status on my todo list since reading all this data for nearly 1000 processes can get pretty expensive and I don't want to read more data, I want to read less. My overarching philosophy for collectl is first and foremost 'do no harm' as far as performance goes.

-mark
 

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x11perfcomp(1X) 														   x11perfcomp(1X)

NAME
x11perfcomp - X11 server performance comparison program SYNOPSIS
x11perfcomp [-r | -ro] [-l label_file] files OPTIONS
x11perfcomp accepts the options listed below: Specifies that the output should also include relative server performance. Specifies that the output should include only relative server performance. Specifies a label file to use. DESCRIPTION
The x11perfcomp program merges the output of several x11perf(1X) runs into a nice tabular format. It takes the results in each file, fills in any missing test results if necessary, and for each test shows the objects/second rate of each server. If invoked with the -r or -ro options, it shows the relative performance of each server to the first server. Normally, x11perfcomp uses the first file specified to determine which specific tests it should report on. Some (non-DEC :) servers may fail to perform all tests. In this case, x11perfcomp automatically substitutes in a rate of 0.0 objects/second. Since the first file determines which tests to report on, this file must contain a superset of the tests reported in the other files, else x11perfcomp will fail. You can provide an explicit list of tests to report on by using the -l switch to specify a file of labels. You can create a label file by using the -label option in x11perf. X DEFAULTS
There are no X defaults used by this program. SEE ALSO
X(1X), x11perf(1X) AUTHORS
Mark Moraes wrote the original scripts to compare servers. Joel McCormack just munged them together a bit. x11perfcomp(1X)
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