reg cpu

[satish]

Dear Erman,

Need your help in interpreting the below output

CPU(s):                16
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             2

we would like to know whether 16 is physical or logical?
we could understand that we have 4 physical cores,can we find out if those cores are dual or quad?

Thanks for the support

[Satish]

Pls correct me if i am wrong.

1 socket =1 physical CPU
2 socket =2 physical CPU

In above output, we have 2 socket means 2 physical CPU?
So 32 is logical?

[ErmanArslansOracleBlog]

what I can say by lookinh at the things you wrote here is;

2 have 2 CPU. Each of them has 4 cores and you have Hyper threading enabled.

So you have 8 cores in total.
As you have HT enabled, you have 16 vcpus in total.

If you have the program dmidecode installed, you can have a good output of your cpu arch..

Here is an example:

[root@odavm1 ~]#  dmidecode -t 4 | egrep -i "Designation|Intel|core|thread"
        Socket Designation: P0 -- this is the 1 st cpu
        Manufacturer: Intel
                HTT (Hyper-threading technology)
        Version: Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz
        Core Count: 12
        Core Enabled: 12
        Thread Count: 24 --as a result of hyper threading


      Socket Designation: P1 -- this is the 2 nd cpu
        Manufacturer: Intel
                HTT (Hyper-threading technology)
        Version: Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz
        Core Count: 12
        Core Enabled: 12
        Thread Count: 24   --as a result of Hyper Threading

[satish]

Dear Erman,

Thanks for providing the info.we ran the below commands in our prod and outputs are as below

[root@motoapp01 ~]# dmidecode -t 4 | egrep -i "Designation|Intel|core|thread"
        Socket Designation: Proc 1
        Manufacturer: Intel(R) Corporation
                HTT (Multi-threading)
        Version: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
        Core Count: 4
        Core Enabled: 4
        Thread Count: 8
                Multi-Core
                Hardware Thread
        Socket Designation: Proc 2
[root@motoapp01~]#



lspu was showing as 1 socket

[root@motoapp01 ~]# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 79
Model name:            Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
Stepping:              1
CPU MHz:               3500.000
BogoMIPS:              6991.57
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              15360K
NUMA node0 CPU(s):     0-7
[root@motoapp01~]#

We have ran this on our primary node.lscpu showed as 1 socket.could you please take some time on our outputs and update us how many sockets/physical CPU and virtual CPU's we have?

[ErmanArslansOracleBlog]

please send the output of  -> dmidecode -t 4 | egrep -i "Designation|Intel|core|thread"

the whole output!

[ErmanArslansOracleBlog]

Also the output of -> dmidecode --type 4

[satish]

Thanks for the updates erman

the whole output!

[root@motonode1~]# dmidecode -t 4 | egrep -i "Designation|Intel|core|thread"
        Socket Designation: Proc 1
        Manufacturer: Intel(R) Corporation
                HTT (Multi-threading)
        Version: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
        Core Count: 4
        Core Enabled: 4
        Thread Count: 8
                Multi-Core
                Hardware Thread
        Socket Designation: Proc 2
[root@motonode1~]# dmidecode --type 4
# dmidecode 3.0
# SMBIOS entry point at 0x788db000
Found SMBIOS entry point in EFI, reading table from /dev/mem.
SMBIOS 2.8 present.

Handle 0x0003, DMI type 4, 42 bytes
Processor Information
        Socket Designation: Proc 1
        Type: Central Processor
        Family: Xeon
        Manufacturer: Intel(R) Corporation
        ID: F1 06 04 00 FF FB EB BF
        Signature: Type 0, Family 6, Model 79, Stepping 1
        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 (FXSAVE and FXSTOR instructions supported)
                SSE (Streaming SIMD extensions)
                SSE2 (Streaming SIMD extensions 2)
                SS (Self-snoop)
                HTT (Multi-threading)
                TM (Thermal monitor supported)
                PBE (Pending break enabled)
        Version: Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
        Voltage: 1.8 V
        External Clock: 100 MHz
        Max Speed: 4000 MHz
        Current Speed: 3500 MHz
        Status: Populated, Enabled
        Upgrade: Socket LGA2011-3
        L1 Cache Handle: 0x0000
        L2 Cache Handle: 0x0001
        L3 Cache Handle: 0x0002
        Serial Number: Not Specified
        Asset Tag: UNKNOWN
        Part Number: Not Specified
        Core Count: 4
        Core Enabled: 4
        Thread Count: 8
        Characteristics:
                64-bit capable
                Multi-Core
                Hardware Thread
                Execute Protection
                Enhanced Virtualization
                Power/Performance Control

Handle 0x0004, DMI type 4, 42 bytes
Processor Information
        Socket Designation: Proc 2
        Type: Central Processor
        Family: <OUT OF SPEC>
        Manufacturer: Not Specified
        ID: 00 00 00 00 00 00 00 00
        Version: Not Specified
        Voltage: Unknown
        External Clock: Unknown
        Max Speed: 4000 MHz
        Current Speed: Unknown
        Status: Unpopulated
        Upgrade: Socket LGA2011-3
        L1 Cache Handle: Not Provided
        L2 Cache Handle: Not Provided
        L3 Cache Handle: Not Provided
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified
        Characteristics: None

[root@motonode1~]#

[ErmanArslansOracleBlog]

Okay..

You have a 2 socket server .  But only 1 of those sockets is occupied with a CPU. The other one is empty.

So you have 1 cpu -> Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
This cpu hase 4 cores and each core has 2 threads.
so you have 8 threads. (vpus)

[satish]

Thanks erman for making it very simple.Could not stop saying big thanks to you

1)can we know if the cores we are using is dual/quad/octa?
2)can we call 8 threads as 8 processors?

[satish]

we have 2 application nodes.

if i run the same query on second node,then i got the similar output.
Output above is specific to a node or applies to both the nodes?

[ErmanArslansOracleBlog]

your cpu is 4 core. "Intel® Xeon® Processor E5-2637 v4" you can read its specs in intel website.

You can ofcourse call 8 threads. You can even call 16 threads, or 32 threads.
These Operating Systems are time sharing..
you don't have to have the number of cores equal to your parallel work.
However, if you increase parallelism, then you may end up with a high load average.

The dmidecode outputs are specific to a node.
If you want to see the cpu arch of other nodes, then you will connect them with root and execute dmidecode on that nodes as well..

I m closing this topic.
So if you have another question, please create a new thread.