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How to set processor load in a Red Hat Linux box?

I have RHEL , which I need to put under a moderate and variable processor load (50% -75%).

What is the best way to do this? Is there a program that can do this that I don’t know about? I am happy to write C code for this to happen, I just don’t know which system calls will help.

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This is exactly what you need: http://weather.ou.edu/~apw/projects/stress/

On the home page: “stress is a simple POSIX workload generator that imposes a configurable amount of CPU, memory, I / O, and disk voltage onto the system. It is written in C and is free software licensed under the GPL license.”

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Find a simple source code prime program. Modify the source code to add a bothersome call to the main loop, depending on what kind of delay gives you the desired processor load.

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. - Linux.

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done
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"nice".

a) : $ nice -n -20 my_command

b) : $ nice -n 20 my_command

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script awk. script , , , passwd loaderver.sh.

script @ http://unixfoo.blogspot.com/2008/11/linux-cpu-hammer-script.html

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Lookbusy . 

lookbusy -c util[-high_util], --cpu-util util[-high_util]

i.e. 60% load
lookbusy -c 60
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, . , glxgears 100% .

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