RHBA-2013:1533 - Bug Fix Advisory

Topic

Updated cpupowerutils packages that fix several bugs and add one enhancement are
now available for Red Hat Enterprise Linux 6.

Description

The cpupowerutils packages provide a suite of tools to manage power states on
appropriately enabled central processing units (CPU).

This update fixes the following bugs:

• 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. (BZ#886225)

• 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. (BZ#886226)

• 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.
(BZ#886227)

• 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. (BZ#886228)

• 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. (BZ#914623)

• 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.
(BZ#914787)

In addition, this update adds the following enhancement:

• 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.
(BZ#852831)

Users of cpupowerutils are advised to upgrade to these updated packages, which
fix these bugs and add this enhancement.

Solution

Before applying this update, make sure all previously released errata relevant
to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386

Fixes

• BZ - 914623 - cpupower set -m doesn't work
• BZ - 914787 - cpupower -v reports version ".."

CVEs

(none)

References

(none)