why cant I use 100% cpu usage in parallel programs
Im testing a program in Geant4(a toolkit on basis on c++)on a cluster,which is running linux CentOS 6.5,and it has 3 Intel(R)4770k processors,total 12 cores(24 CPU).
The issue is that when I run the program on the cluster, only the cpu usage of the master node is shown as 100%, and the other two nodes are almost unsed.
I also tested another program,all of 24 totally are used(100% cpu).
Thanks in advance!