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Full Discussion: Number of CPU in LINUX server
Operating Systems Linux Red Hat Number of CPU in LINUX server Post 302416456 by mark54g on Monday 26th of April 2010 01:15:47 PM
Old 04-26-2010
You may not have 16 CPU cores. With technologies like hyperthreading, you may have fewer total CPU cores however you will have 16 logical cores (The difference is that the logical cores may share resources and may not be real CPU cores).

Your best bet would be to find the type of CPU in your system. Here is one way to do so:
Code:
dmidecode | grep -i CPU
        Version: Intel(R) Xeon(R) CPU           E5530  @ 2.40GHz
        Version: Intel(R) Xeon(R) CPU           E5530  @ 2.40GHz

Compare that to:
Code:
cat /proc/cpuinfo | grep -i proc
processor       : 0
processor       : 1
processor       : 2
processor       : 3
processor       : 4
processor       : 5
processor       : 6
processor       : 7
processor       : 8
processor       : 9
processor       : 10
processor       : 11
processor       : 12
processor       : 13
processor       : 14
processor       : 15

I know for a fact that I have only 8 discrete CPU cores, 4 on each of 2 sockets.

Now, to find out how many ethernet cards you have:
Code:
ifconfig -a | grep -i eth
eth0      Link encap:Ethernet  HWaddr 00:08:74:XX:XX:XX (X to block out my real MAC address)

 

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LEARN ABOUT NETBSD

psrset

PSRSET(8)						    BSD System Manager's Manual 						 PSRSET(8)

NAME

     psrset -- control processor sets

SYNOPSIS

     psrset [setid ...]
     psrset -a setid cpuid ...
     psrset -b setid pid ...
     psrset -c [cpuid ...]
     psrset -d setid
     psrset -e setid command
     psrset -i [setid ...]
     psrset -p
     psrset -r cpuid ...
     psrset -u pid ...

DESCRIPTION

     The psrset command can be used to control and inspect processor sets.

     The system always contains at least one processor set: the default set.  The default set must contain at least one online processor (CPU) at
     all times.

     Available options:

     -a      Assign one or more processors (CPUs) to the set setid.  In the current implementation, a CPU may only be present in one set.  CPU IDs
	     are as reported and used by the cpuctl(8) command.

     -b      Bind one or more processes to the set setid.  All LWPs within the processes will be affected.  Bindings are inherited when new LWPs
	     or processes are forked.  However, setting a new binding on a parent process does not affect the bindings of its existing child pro-
	     cesses.

     -c      Create a new processor set.  If successful, the ID of the new set will be printed.  If a list of CPU IDs is provided, those CPUs will
	     be assigned to the set upon creation.  Otherwise, the set will be created empty.

     -d      Delete the processor set specified by setid.  Any LWPs bound to the set will be re-bound to the default processor set.

     -e      Execute a command within the processor set specified by setid.

     -i      List all processor sets.  For each set, print the member CPUs.  If psrset is run without any options, it behaves as if -i were given.

     -p      List all CPUs.  For each CPU, print the associated processor set.

     -r      Remove a CPU from its current set, and return it back to the default processor set.

     -u      Bind the specified processes to the system default processor set.

SEE ALSO

     pset(3), cpuctl(8), schedctl(8)

HISTORY

     The psrset command first appeared in NetBSD 5.0.

BSD
								September 23, 2008							       BSD
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