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Operating Systems Linux How to find the load on CPU ? Post 302230310 by vikings.svnit on Friday 29th of August 2008 03:52:52 AM
Old 08-29-2008
How to find the load on CPU ?

Hi ALL,
I have to develop a script which checks for the load on CPU on regular intervals. I created a simple script which uses 'uptime' command to find out the avg load in the last 5 min. I then used grep and put the value of the avg load in a variable OUT.

It was working fine till now. Now I have to build one more condition wherein if the load is above 5 then I have to find out the top processes which are consuming the resources. I tried the following

if [ "$OUT" -gt "$THRESHOLD" ]
then
top -n 1 > top$$.lst
fi

But this is not working since OUT is a character variable and if condition is expecting it to be integer.

Please help me out.
 

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Module::Load(3pm)					 Perl Programmers Reference Guide					 Module::Load(3pm)

NAME
Module::Load - runtime require of both modules and files SYNOPSIS
use Module::Load; my $module = 'Data:Dumper'; load Data::Dumper; # loads that module load 'Data::Dumper'; # ditto load $module # tritto my $script = 'some/script.pl' load $script; load 'some/script.pl'; # use quotes because of punctuations load thing; # try 'thing' first, then 'thing.pm' load CGI, ':standard' # like 'use CGI qw[:standard]' DESCRIPTION
"load" eliminates the need to know whether you are trying to require either a file or a module. If you consult "perldoc -f require" you will see that "require" will behave differently when given a bareword or a string. In the case of a string, "require" assumes you are wanting to load a file. But in the case of a bareword, it assumes you mean a module. This gives nasty overhead when you are trying to dynamically require modules at runtime, since you will need to change the module notation ("Acme::Comment") to a file notation fitting the particular platform you are on. "load" eliminates the need for this overhead and will just DWYM. Rules "load" has the following rules to decide what it thinks you want: o If the argument has any characters in it other than those matching "w", ":" or "'", it must be a file o If the argument matches only "[w:']", it must be a module o If the argument matches only "w", it could either be a module or a file. We will try to find "file" first in @INC and if that fails, we will try to find "file.pm" in @INC. If both fail, we die with the respective error messages. Caveats Because of a bug in perl (#19213), at least in version 5.6.1, we have to hardcode the path separator for a require on Win32 to be "/", like on Unix rather than the Win32 "". Otherwise perl will not read its own %INC accurately double load files if they are required again, or in the worst case, core dump. "Module::Load" cannot do implicit imports, only explicit imports. (in other words, you always have to specify explicitly what you wish to import from a module, even if the functions are in that modules' @EXPORT) ACKNOWLEDGEMENTS
Thanks to Jonas B. Nielsen for making explicit imports work. BUG REPORTS
Please report bugs or other issues to <bug-module-load@rt.cpan.org<gt>. AUTHOR
This module by Jos Boumans <kane@cpan.org>. COPYRIGHT
This library is free software; you may redistribute and/or modify it under the same terms as Perl itself. perl v5.12.1 2010-04-26 Module::Load(3pm)
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