Dear Centos Users We were wondering how can we change the default policy of numactl. In other words, our cluster has 10 servers, each server has two nodes, and each node has 16 cores. Recently, we observed a poor performance of our cluster when a couple of jobs run on the same server. By investigating the problem, we found that each job moves randomly among the 32 cores of the server. This returns to the fact that the 32 cores of each server bound together as seen below. How can we make our server back to two numa nodes? Any kind of support will be highly appreciated. B.T.W. We use Rocks6.1 Thanks in advance Sincerely; M. Ibrahim
################ #numactl -show policy: default preferred node: current physcpubind: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 cpubind: 0 1 nodebind: 0 1 membind: 0 1 ################ # numactl --hardware available: 2 nodes (0-1) node 0 cpus: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 node 0 size: 16287 MB node 0 free: 15619 MB node 1 cpus: 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 node 1 size: 16384 MB node 1 free: 15839 MB node distances: node 0 1 0: 10 21 1: 21 10 ################