Hello,

I have been given to analyse a problem related to a NUMA vCPU placement and memory allocation.

The physical server is based on Intel Xeon E7-8880 V4 having 2 Processor sockets and 22 processor cores per socket with 88 logical processors.

The output of the command sched-stats -t numa-clients shows very imbalanced distribution of vCPUs and significant remote memory access. (Please see attached image). The system has NUMA.PreferHT=1 already set.

My question is, why vCPUs are unevenly distributed and there is significant remote memory access? Where should I look for more information? 

Thank you very much for your time and answers.

Roshan