I've tried to decide processor affinity rule for my applications according to /proc/cpuinfo , My redhat Linux showes
processor : 0 to 47 , means server has 48 processor unitphysical id : 0 to 3 , means server has 4 cpu sockets cpu cores : 6 , means each socket has 6 cores siblings : 12 , means each core has 2 hyperthreads So totally , this server has 4 * 6 * 2 = 48 processor units , am I correct so far ?
What I like to do is to use sched_setaffinity function , first I like to know is the hyperthreads in the same core , for example ...
processor 0 : physical id:0,core id: 0 ...processor 24 : physical id:0,core id: 0 ...If in my application , I use CPU_SET(0, &mask) in thread1 , CPU_SET(24, &mask)in thread2 , then I might can say that thread1 and thread2 will share the same L1 cache,and of course share the same L2 cache , too ...am I correct in this guess ?
