I have a Beowulf Super Computer consisting of (4) Dell PowerEdge R610 each with 2xQuad Core Xeon E5640 processors @ 2.4Ghz
I also have MPIv3.2 installed for parallel messaging.
The master node has the nfs server running that the other 3 compute nodes mount at boot for common home directories and execution space.
Here is the output of lscpu:
mpiuser@PowerEdge-R610-LCN0:~$ sudo lscpu | more
[sudo] password for mpiuser:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 16
On-line CPU(s) list: 0-15
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 44
Model name: Intel(R) Xeon(R) CPU E5620 @ 2.40GHz
Stepping: 2
CPU MHz: 2393.915
BogoMIPS: 4787.83
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 12288K
NUMA node0 CPU(s): 0,2,4,6,8,10,12,14
NUMA node1 CPU(s): 1,3,5,7,9,11,13,15
Flags: fpu 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 syscall nx pdpe1g
b rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_t
sc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3
cx16 xtpr pdcm pcid dca sse4_1 sse4_2 popcnt aes lahf_lm tpr_shadow vnmi flexpr
iority ept vpid dtherm ida arat
mpiuser@PowerEdge-R610-LCN0:~$
As you can see (I believe this is true) that the information relates only to this server.
Now either there is a CPU core limit in Ubuntu 16.04 (like RHEL @ 16 without licensing) or lscpu does not record the cores on the other (3) compute nodes.
Question:
Is there a way for the Linux (Ubuntu 16.04) OS to recognize all 32 cores (64 logical CPUs) or is this a limitation of lscpu?
Is there a way to measure is the OS is using all 32 cores?
