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Linux cpu processor cores and threads

Fri, 11/12/2010 - 12:26 — sandip

/proc/cpuinfo has the info you need to identify the number of processors, cores and threads.

To get the total number of processors/cpu cores:

grep -c processor /proc/cpuinfo

Total number of physical cpus:

grep "physical id" /proc/cpuinfo | sort -u | wc -l

Number of cores per cpu:

grep "cores" /proc/cpuinfo | sort -u

To check if hyperthreading is enabled:

grep "cores\|siblings" /proc/cpuinfo | sort -u

If siblings is a multiple of cores then hyperthreading is enabled.

Determine cpu bit

Sat, 07/04/2009 - 19:18 — sandip

You can try this to find out if your CPU/Processor is 32 bit or 64 bit:

cat /proc/cpuinfo | grep flags | grep lm

lm means Long Mode = 64 bit CPU

Also:

getconf LONG_BIT

Should display 32 or 64.

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