03-07-2012
Hyperthreading, currently, is for 2 threads per core, however they share resources, and can cause some issues with performance. You may want to look output of using cat on /proc/cpuinfo and look for:
core id, cpu cores, physical id, siblings, and if you see the "word" ht in flags.
You can disable Hyperthreading. Since the two threads share resources, they are not deterministic in performance.
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10. SuSE
Here is a chance for Linux users to easily compare Linux CPU info and some meaningless BOGOMIPS. Everyone who is running Linux is welcome to:
cat /proc/cpuinfo
and post the results.
Here is the results for www.unix.com:
processor : 0
vendor_id : AuthenticAMD
cpu family... (182 Replies)
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LEARN ABOUT CENTOS
cpupower-frequency-info
CPUPOWER-FREQUENCY-INFO(1) cpupower Manual CPUPOWER-FREQUENCY-INFO(1)
NAME
cpupower frequency-info - Utility to retrieve cpufreq kernel information
SYNTAX
cpupower [ -c cpulist ] frequency-info [options]
DESCRIPTION
A small tool which prints out cpufreq information helpful to developers and interested users.
OPTIONS
-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.
REMARKS
By default only values of core zero are displayed. How to display settings of other cores is described in the cpupower(1) manpage in the
--cpu option section.
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
cpupower-frequency-set(1), cpupower(1)
0.1 CPUPOWER-FREQUENCY-INFO(1)