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Full Discussion: Full usage of CPU
Top Forums UNIX for Dummies Questions & Answers Full usage of CPU Post 37696 by zing on Thursday 26th of June 2003 03:07:00 AM
Old 06-26-2003
Same trouble

Hi ,
I am facing a similar problem on the same configuration.
In my case the problem is the cpu usage does show 97 - 99 % usage and also there is no i/o wait, when i fire multiple processes.
but i don't get the performance.

Basically i m running a application which generates small files.I need to generate around 170 files per minute. If run just one process one file takes 5 secs to generate. When i run say 10 process it shows 40 secs to 200 secs for certain files and also the average time is around 4 secs per file.

Is it that i m overrunning the process or do i need to set some kernel parameters.Please help.

Zing
 

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cpufreq-set(1)															    cpufreq-set(1)

NAME
cpufreq-set - A small tool which allows to modify cpufreq settings. SYNTAX
cpufreq-set [options] DESCRIPTION
cpufreq-set allows you to modify cpufreq settings without having to type e.g. "/sys/devices/system/cpu/cpu0/cpufreq/scaling_set_speed" all the time. OPTIONS
-c --cpu <CPU> number of CPU where cpufreq settings shall be modified. -d --min <FREQ> new minimum CPU frequency the governor may select. -u --max <FREQ> new maximum CPU frequency the governor may select. -g --governor <GOV> new cpufreq governor. -f --freq <FREQ> specific frequency to be set. Requires userspace governor to be available and loaded. -r --related modify all hardware-related CPUs at the same time -h --help Prints out the help screen. REMARKS
Omitting the -c or --cpu argument is equivalent to setting it to zero. The -f FREQ, --freq FREQ parameter cannot be combined with any other parameter except the -c CPU, --cpu CPU parameter. FREQuencies can be passed in Hz, kHz (default), MHz, GHz, or THz by postfixing the value with the wanted unit name, without any space (fre- quency in kHz =^ Hz * 0.001 =^ MHz * 1000 =^ GHz * 1000000). On Linux kernels up to 2.6.29, the -r or --related parameter is ignored. FILES
/sys/devices/system/cpu/cpu*/cpufreq/ /proc/cpufreq (deprecated) /proc/sys/cpu/ (deprecated) AUTHORS
Dominik Brodowski <linux@brodo.de> - author Mattia Dongili<malattia@gmail.com> - first autolibtoolization SEE ALSO
cpufreq-info(1) Mattia Dongili 0.1 cpufreq-set(1)
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