Fearthepenguin.net

Now this will only work in Solaris 10, but this should give a nice output of how many Physical CPUs, Physical Cores, and Threads [Virtual CPUs] are recognized by Solaris. This will work on Solaris 10 for SPARC or x86.

The output looks like this:

**********
user@host:~$ ~/bin/cpucount.sh

In host.example.com there are:

1        Physical CPUs/Sockets
8        Physical Cores across all CPUs
8        Cores per Physical CPU
64        Total virtual CPUs recognized by the OS
8        Threads per Core (Virtual CPUs per Core)

**********

Here’s the actual script to produce the above output:

#!/bin/bash
# Quick and **dirty** script to count the number of physical CPUs,
# physical cores and virtual CPUs recognized by the OS
# The CORES part will only work in Solaris 10
# The rest I'm not sure about.

HOSTNAME=`hostname`

# Physical - the number of physical sockets/CPUs
PHYSICAL=`psrinfo -pv | grep physical | wc -l`

# Cores - The number of physical cores total [across all CPUs]
# I'm pretty sure this part will only work in Solaris 10
CORES=`kstat cpu_info | \
    egrep "cpu_info |core_id" | \
    awk \
        'BEGIN { printf "%4s %4s", "CPU", "core" } \
         /module/ { printf "\n%4s", $4 } \
         /core_id/ { printf "%4s", $2} \
         END { printf "\n" }' | awk '{print $2}' | grep -v core | sort -u | wc -l`

CORESPER=`expr ${CORES} / ${PHYSICAL}`

# This is the TOTAL number of processors [virtual and real]
# that the OS recognizes

VIRTUAL=`mpstat | grep -v CPU | wc -l`
VIRTUALPER=`expr ${VIRTUAL} / ${CORES}`

echo
echo "In ${HOSTNAME} there are:"
echo "${PHYSICAL}       Physical CPUs/Sockets"
echo "${CORES}          Physical Cores across all CPUs"
echo "       ${CORESPER}        Cores per Physical CPU"
echo "${VIRTUAL}        Total virtual CPUs recognized by the OS"
echo "       ${VIRTUALPER}      Threads per Core (Virtual CPUs per Core)"

Tags: bash, script, Solaris, utility