8.22. cpupowerutils

Updated cpupowerutils packages that fix several bugs and add one enhancement are now available for Red Hat Enterprise Linux 6.
The cpupowerutils packages provide a suite of tools to manage power states on appropriately enabled central processing units (CPU).

Bug Fixes

Previously, some of the commands in the cpupowerutils packages were missing manual pages. Manual pages for the turbostat, x86_energy_perf_policy, cpufreq-bench, and cpufreq-bench_plot.sh commands have been added, thus fixing this bug.
If a non-root user tried to run the cpufreq-bench utility, it terminated unexpectedly with a segmentation fault, and an ABRT notification appeared on the desktop. With this update, a warning message is displayed to the user instead, informing them that it is necessary to run the utility as root.
Prior to this update, the x86_energy_perf_policy utility failed when it tried to open the /dev/cpu/*/msr/ directory. Consequently, a "permission denied" error message was returned. With this update, a new error message explains that the command needs root privileges and x86_energy_perf_policy cleanly exits.
Previously, the interactive help for the x86_energy_perf_policy utility was short and confusing. The help text has been expanded to clarify the meaning of the command-line options.
Due to the missing implementation for the "cpupower set -m" command, the error message is returned upon launching the command. Previously, this message wrongly implied that the sched-mc utility is not supported on the system. This update clarifies the message to clearly state that sched-mc is not yet implemented.
Previously, running the "cpupower -v" or "cpupower --version" commands returned incorrect version information. This bug has been fixed and a selected component of cpupower now reports the correct version-release number.


Intel turbostat v3.0 utility has been included in Red Hat Enterprise Linux. The utility is used to read current CPU core frequency and active C-states.
Users of cpupowerutils are advised to upgrade to these updated packages, which fix these bugs and add this enhancement.