09-29-2005
knlist API on AIX 5.3
Hi,
I have written an application which reports the CPU information like user cpu%, sys cpu%, idle cpu% and wait cpu%. The application is built on an AIX 5.1 machine. The appliaction runs fine on AIX 5.1 and 5.2 and their results match with that of the topas command. But when I run the application on AIX 5.3 for some reason the values are not matching with that of the topas command (eg: usr and sys cpu% are always 0 while topas shows values for these fields)
I am using the knlist API to get the address of the kernel symbol "cpuinfo". Then using the address as offset I am reading the cpu values from the kernel file "/dev/kmem". I am using the structure "struct cpuinfo" for storing the values retrieved.
I made a walk thru into the code and found that the knlist API has successfully returned the offset. I am going mad on what could be wrong.
Could anyone please let me know on what could be wrong....Is there any fixpack that need to be applied for AIX 5.3.....????
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LEARN ABOUT SUSE
cpufreq-info
cpufreq-info(1) cpufreq-info(1)
NAME
cpufreq-info - Utility to retrieve cpufreq kernel information
SYNTAX
cpufreq-info [options]
DESCRIPTION
A small tool which prints out cpufreq information helpful to developers and interested users.
OPTIONS
-c --cpu <CPU>
<CPU> number which information shall be determined about.
-e --debug
Prints out debug information.
-f --freq
Get frequency the CPU currently runs at, according to the cpufreq core.
-w --hwfreq
Get frequency the CPU currently runs at, by reading it from hardware (only available to root).
-l --hwlimits
Determine the minimum and maximum CPU frequency allowed.
-d --driver
Determines the used cpufreq kernel driver.
-p --policy
Gets the currently used cpufreq policy.
-g --governors
Determines available cpufreq governors.
-a --related-cpus
Determines which CPUs run at the same hardware frequency.
-a --affected-cpus
Determines which CPUs need to have their frequency coordinated by software.
-s --stats
Shows cpufreq statistics if available.
-y --latency
Determines the maximum latency on CPU frequency changes.
-o --proc
Prints out information like provided by the /proc/cpufreq interface in 2.4. and early 2.6. kernels.
-m --human
human-readable output for the -f, -w, -s and -y parameters.
-h --help
Prints out the help screen.
REMARKS
You can't specify more than one of the output specific options -o -e -a -g -p -d -l -w -f -y.
You also can't specify the -o option combined with the -c option.
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-set(1)
Mattia Dongili 0.1 cpufreq-info(1)