I come to the forum for help!
I have a server with this processor for my linux. "Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz" and my Centos 5.9 does not detect all cores.
LOG FROM cat /proc/cpuinfo
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[root@localhost asterisk]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 79
model name : Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz
stepping : 1
cpu MHz : 1698.076
cache size : 15360 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 20
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx pdpe1gb rdtscp lm constant_tsc up nonstop_tsc arat pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm abm 3dnowprefetch
bogomips : 3396.15
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management: [8]
LOG FROM /var/log/messages | grep core
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[root@localhost asterisk]# cat /var/log/messages | grep CPU
Nov 22 15:49:07 localhost kernel: SMP: Allowing 0 CPUs, 0 hotplug CPUs
Nov 22 15:49:07 localhost kernel: Initializing CPU#0
Nov 22 15:49:08 localhost kernel: CPU: L1 I cache: 32K, L1 D cache: 32K
Nov 22 15:49:08 localhost kernel: CPU: L2 cache: 256K
Nov 22 15:49:08 localhost kernel: CPU: L3 cache: 15360K
Nov 22 15:49:08 localhost kernel: CPU: Physical Processor ID: 0
Nov 22 15:49:08 localhost kernel: CPU: Processor Core ID: 0
Nov 22 15:49:09 localhost kernel: weird, boot CPU (#0) not listed by the BIOS.
Nov 22 15:49:10 localhost kernel: Brought up 1 CPUs
tanks