uniprocessor or multiprocessor

Question

On unix, how could we know whether the system is multiprocessor or uniprocessor?

Answer 1

Some times we have to answer owr own question :)

On Solaris run the command

/usr/sbin/psrinfo -v|grep "Status of processor"|wc -l

On AIX run the command

lsdev -C|grep Process|wc -l

On HP-UX run the following commands (requires superuser privileges):

P=`echo processor_count/D | adb -k /stand/vmunix /dev/mem |tail -1|awk '{print $2}'` echo "The number of processors on `hostname` = $P"

On Tru64 run the command

 /usr/sbin/psrinfo -v|grep "Status of processor"|wc -l

Answer 2

I don't know if it applies to Unix as well, but for Linux, from command line, see here: http://www.howtogeek.com/howto/ubuntu/display-number-of-processors-on-linux/

Answer 3

How about

cat /proc/cpuinfo | grep -i 'processor' | wc -l

Or even

 dmesg | grep -i cpu

Look out for "Brought up x processors" in the last one