mirror of https://gitee.com/openkylin/linux.git
47b98c74fa
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> |
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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