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No of cores in Xeon

How can I know that how many cores are in processor?
I executed the following command

Code:

cat /proc/cpuinfo

And the output was something like this. Can someone tell how many cores are there?

Code:

processor      : 0

vendor_id      : GenuineIntel

cpu family      : 15

model          : 4

model name      : Intel(R) Xeon(TM) CPU 2.80GHz

stepping        : 1

cpu MHz        : 2800.244

cache size      : 1024 KB

.

.

.

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processor      : 1

vendor_id      : GenuineIntel

cpu family      : 15

model          : 4

model name      : Intel(R) Xeon(TM) CPU 2.80GHz

stepping        : 1

cpu MHz        : 2800.244

cache size      : 1024 KB

.

.

.

.



processor      : 2

vendor_id      : GenuineIntel

cpu family      : 15

model          : 4

model name      : Intel(R) Xeon(TM) CPU 2.80GHz

stepping        : 1

cpu MHz        : 2800.244

cache size      : 1024 KB

.

.

.

.

processor      : 3

vendor_id      : GenuineIntel

cpu family      : 15

model          : 4

model name      : Intel(R) Xeon(TM) CPU 2.80GHz

stepping        : 1

cpu MHz        : 2800.244

cache size      : 1024 KB

Did you look at the "cpu cores" line of cpuinfo? That directly shows the core count.

Try using; dmidecode
If your lucky then is is available as part of the Linux installation, if not then visit;

http://freshmeat.net/projects/dmidecode/

Quote:

Originally Posted by Matir (Post 3032436)

Did you look at the "cpu cores" line of cpuinfo? That directly shows the core count.

There is now line matching "cpu cores".

Quote:

Originally Posted by Lenard (Post 3032442)

Try using; dmidecode

It is displaying a lot of info :-) What should i look for?

Odd, my CPU has:
core id : 1
cpu cores : 2

You should see a phyiscal id line in there... if so, count the number of cpus listed with the same phyiscal id, and that is the number of cores.

Quote:

Originally Posted by linuxbeginner0 (Post 3032513)

It is displaying a lot of info :-) What should i look for?

Look at the Processor Information portion.

Could also use lshw -C processor

Code:

it-etch:~# lshw -C processor

  *-cpu

      description: CPU

      product: Intel(R) Pentium(R) D CPU 2.80GHz

      vendor: Intel Corp.

      physical id: 400

      bus info: cpu@0

      version: 15.4.7

      serial: 0000-0F47-0000-0000-0000-0000

      slot: Microprocessor

      size: 2800MHz

      width: 64 bits

      clock: 800MHz

      capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx x86-64 constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm

      configuration: id=1

    *-logicalcpu:0

          description: Logical CPU

          physical id: 1.1

          width: 64 bits

          capabilities: logical

    *-logicalcpu:1

          description: Logical CPU

          physical id: 1.2

          width: 64 bits

          capabilities: logical

As you can see from the output there is one physical processor identified as CPU@0
and two logical processors (cores) identified as logicalcpu:0 & logicalcpu:1

so if you had two CPU's with two cores it would be fairly easy to see with this output.

dmidecode does not appear to provide all the same info.. kinda odd since lshw uses dmidecode as one source to gather info.

Code:

it-etch:~# dmidecode -t processor

# dmidecode 2.8

SMBIOS 2.3 present.



Handle 0x0400, DMI type 4, 40 bytes

Processor Information

        Socket Designation: Microprocessor

        Type: Central Processor

        Family: Pentium 4

        Manufacturer: Intel

        ID: 47 0F 00 00 FF FB EB BF

        Signature: Type 0, Family 15, Model 4, Stepping 7

        Flags:

                FPU (Floating-point unit on-chip)

                VME (Virtual mode extension)

                DE (Debugging extension)

                PSE (Page size extension)

                TSC (Time stamp counter)

                MSR (Model specific registers)

                PAE (Physical address extension)

                MCE (Machine check exception)

                CX8 (CMPXCHG8 instruction supported)

                APIC (On-chip APIC hardware supported)

                SEP (Fast system call)

                MTRR (Memory type range registers)

                PGE (Page global enable)

                MCA (Machine check architecture)

                CMOV (Conditional move instruction supported)

                PAT (Page attribute table)

                PSE-36 (36-bit page size extension)

                CLFSH (CLFLUSH instruction supported)

                DS (Debug store)

                ACPI (ACPI supported)

                MMX (MMX technology supported)

                FXSR (Fast floating-point save and restore)

                SSE (Streaming SIMD extensions)

                SSE2 (Streaming SIMD extensions 2)

                SS (Self-snoop)

                HTT (Hyper-threading technology)

                TM (Thermal monitor supported)

                PBE (Pending break enabled)

        Version: Not Specified

        Voltage: 1.8 V

        External Clock: 800 MHz

        Max Speed: 5200 MHz

        Current Speed: 2800 MHz

        Status: Populated, Enabled

        Upgrade: ZIF Socket

        L1 Cache Handle: 0x0700

        L2 Cache Handle: 0x0701

        L3 Cache Handle: Not Provided

        Serial Number: Not Specified

        Asset Tag: Not Specified

        Part Number: Not Specified