How many CPUs does server X have?

One of the most frequently asked questions that I now get as an Oracle Principal Sales Consultant is "How many CPU's does server X have?" The reason for the question is that Oracle largely prices its software by CPU count verses other methods.

Toward that end, I put together this reference for anyone that needs this kind of information.

Note that their are typically multiple methods by which to determine the number of CPUs. Further, some commands show just the number of physical CPUs while others list the the number of threads, or cores, or Hyper-Threads. With that said, here are the methods per operating system.

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Solaris

The following command will give you the total number of physical processors in the server.
# psrinfo -p
2

The following command will return the total number of threads/cores in the server.
# psrinfo | wc -l
8

The following command will return detailed information about each physical processor.
# psrinfo -pv
2

The physical processor has 4 virtual processors (0 2 4 6)
x86 (chipid 0x0 GenuineIntel family 6 model 15 step 7 clock 2333 MHz)
Intel(r) Xeon(r) CPU E5345 @ 2.33GHz
The physical processor has 4 virtual processors (1 3 5 7)
x86 (chipid 0x1 GenuineIntel family 6 model 15 step 7 clock 2333 MHz)
Intel(r) Xeon(r) CPU E5345 @ 2.33GHz

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Linux

The following command will return the total number of threads/cores in the server.

# grep -c "^processor" /proc/cpuinfo

2

The following command will return detailed information about each physical processor.

# egrep -i "^model name|^core id|^cpu MHz" /proc/cpuinfo

model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+

cpu MHz : 1000.000

core id : 0

model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+

cpu MHz : 1000.000

core id : 1

---

HP-UX

The following commands will return the total number of threads/cores in the server.

# mpsched -s | grep "Processor Count"

Processor Count : 4

or

# machinfo | grep "Number of CPUs"

Number of CPUs = 4

or

# /usr/sbin/ioscan -kf | grep processor | wc -l

4

The following command will return detailed information about each physical processor.

# machinfo

CPU info:

Number of CPUs = 4

Clock speed = 1595 MHz

Bus speed = 532 MT/s

CPUID registers

vendor information = "GenuineIntel"

processor serial number = 0x0000000000000000

processor version info = 0x0000000020000704

Reference:

* Howto find CPU is dual/quad core in HP-UX

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AIX

The following commands will give you the total number of physical processors in the server.

# lsdev -Cc processor |wc –l

or

# prtconf | grep Processor

or

The following command will return the total number of threads/cores in the server.

# bindprocessor -q

The following command will return detailed information about each physical processor.

# prtconf

and

# lsattr -El sys0 -a modelname

and

# lparstat -i|grep ^Active\ Phys

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Windows

Use the following sequence of mouse clicks to view the CPU information for the server.

1. Right click the button on the "Start" icon in the lower left hand corner of the screen,

2. click on "Explore".

3. Right click on "My Computer"

4. and click on "Properties".

You will see the type and number of CPUs under the Computer portion of the System Properties window.

Have a great day!

Brad