How many processors are on the server

central-processing-unit

On a server which has two sockets for CPUs, I'm going to determine whether I‌ can add a new CPU to enhance the computation power. I‌ don't have physical access to the server.

# nproc --all
32

# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                32
On-line CPU(s) list:   0-31
Thread(s) per core:    2
Core(s) per socket:    8
Socket(s):             2
NUMA node(s):          2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 45
Model name:            Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
Stepping:              7
CPU MHz:               2499.765
CPU max MHz:           2800.0000
CPU min MHz:           1200.0000
BogoMIPS:              4001.49
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              20480K
NUMA node0 CPU(s):     0-7,16-23
NUMA node1 CPU(s):     8-15,24-31

On the Intel page on E5-2650 I see

# of Cores 8
# of Threads 16

So, I'm confused and wondering whether I‌ can add a second CPU to this server, or it already has 2 CPUs?

Best Answer

Both sockets are already occupied. 

Thread(s) per core:    2
Core(s) per socket:    8
Socket(s):             2

Also, nproc lists 32 cores. Since the E5-2650 has 8 cores and 2 threads per core, this means that you need to have 2 physical processors to get to 32 threads.

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