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linux/tools/power/cpupower
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Herton R. Krzesinski 47b98c74fa cpupower: mperf monitor: fix output in MAX_FREQ_SYSFS mode 
There is clearly wrong output when mperf monitor runs in MAX_FREQ_SYSFS mode:
average frequency shows in kHz unit (despite the intended output to be in MHz),
and percentages for C state information are all wrong (including high/negative
values shown).

The problem is that the max_frequency read on initialization isn't used where it
should have been used on mperf_get_count_percent (to estimate the number of
ticks in the given time period), and the value we read from sysfs is in kHz, so
we must divide it to get the MHz value to use in current calculations.

While at it, also I fixed another small issues in the debug output of
max_frequency value in mperf_get_count_freq.

Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-05-30 02:21:31 +02:00
..
bench cpupower: bench: parse.c: Fix several minor errors 2014-07-30 01:57:13 +02:00
debug cpufreq: Make linux-pm@vger.kernel.org official mailing list 2014-05-01 01:15:32 +02:00
lib cpupowerutils: increase MAX_LINE_LEN 2011-07-29 18:35:40 +02:00
man cpupower: Remove mc and smt power aware scheduler info/settings 2014-05-17 00:36:37 +02:00
po
utils cpupower: mperf monitor: fix output in MAX_FREQ_SYSFS mode 2015-05-30 02:21:31 +02:00
.gitignore cpupower tools: Update .gitignore for files created in the debug directories 2012-11-27 23:07:18 +01:00
Makefile Revert "cpupower Makefile change to help run the tool without 'make install'" 2015-03-11 21:56:49 +01:00
README cpupower: Remove dead link to homepage, and update the targets built. 2014-05-17 00:36:36 +02:00
ToDo cpupower: Remove dead link to homepage, and update the targets built. 2014-05-17 00:36:36 +02:00

README 

The cpupower package consists of the following elements:

requirements
------------

On x86 pciutils is needed at runtime (-lpci).
For compilation pciutils-devel (pci/pci.h) and a gcc version
providing cpuid.h is needed.
For both it's not explicitly checked for (yet).


libcpupower
----------

"libcpupower" is a library which offers a unified access method for userspace
tools and programs to the cpufreq core and drivers in the Linux kernel. This
allows for code reduction in userspace tools, a clean implementation of
the interaction to the cpufreq core, and support for both the sysfs and proc
interfaces [depending on configuration, see below].


compilation and installation
----------------------------

make
su
make install

should suffice on most systems. It builds libcpupower to put in
/usr/lib; cpupower, cpufreq-bench_plot.sh to put in /usr/bin; and
cpufreq-bench to put in /usr/sbin. If you want to set up the paths
differently and/or want to configure the package to your specific
needs, you need to open "Makefile" with an editor of your choice and
edit the block marked CONFIGURATION.


THANKS
------
Many thanks to Mattia Dongili who wrote the autotoolization and
libtoolization, the manpages and the italian language file for cpupower;
to Dave Jones for his feedback and his dump_psb tool; to Bruno Ducrot for his
powernow-k8-decode and intel_gsic tools as well as the french language file;
and to various others commenting on the previous (pre-)releases of 
cpupower.


        Dominik Brodowski