Hi All,
I am using RHEL 6.4 on a Dell Server with 32 cores.
But in the Cpus_allowed_list only 30 cores are available. Why is that?
See the snippet from cat /proc/self/status: Cpus_allowed: 7fff7fff Cpus_allowed_list: 0-14,16-30
The allowed list is same for the init process as well (see below). I didn't see this issue, in RHEL 6.2.
Why is that? Is there a way to change it?
-miraj
------------------------------------- [root@localhost bin]# uname -a Linux localhost 2.6.32-358.el6.x86_64 #1 SMP Tue Jan 29 11:47:41 EST 2013 x86_64 x86_64 x86_64 GNU/Linux [root@localhost bin]# [root@localhost bin]# [root@localhost bin]# cat /proc/1/status Name: init State: S (sleeping) Tgid: 1 Pid: 1 PPid: 0 TracerPid: 0 Uid: 0 0 0 0 Gid: 0 0 0 0 Utrace: 0 FDSize: 64 Groups: VmPeak: 19364 kB VmSize: 19356 kB VmLck: 0 kB VmHWM: 1544 kB VmRSS: 1544 kB VmData: 328 kB VmStk: 88 kB VmExe: 140 kB VmLib: 2348 kB VmPTE: 52 kB VmSwap: 0 kB Threads: 1 SigQ: 1/256326 SigPnd: 0000000000000000 ShdPnd: 0000000000000000 SigBlk: 0000000000000000 SigIgn: 0000000000001000 SigCgt: 00000001a0016623 CapInh: 0000000000000000 CapPrm: ffffffffffffffff CapEff: fffffffffffffeff CapBnd: ffffffffffffffff Cpus_allowed: 7fff7fff Cpus_allowed_list: 0-14,16-30 Mems_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000003 Mems_allowed_list: 0-1 voluntary_ctxt_switches: 1603 nonvoluntary_ctxt_switches: 62