Dear all,
I have a SUN SPARC T5240, in Oracle web site the specification of this
machine said that it comes with two phisical CPU's with 8 cores by cpu and 8
threads by core. In Debian GNU/Linux 6.0 with kernel version "Linux T5240
2.6.32-5-sparc64-smp #1 SMP Mon Jan 16 17:28:56 UTC 2012 sparc64 GNU/Linux" the
info of the cpu said that: root@T5240:~# cat /proc/cpuinfo
cpu : UltraSparc T2 (Niagara2)
fpu : UltraSparc T2 integrated FPU
pmu : niagara2
prom : OBP 4.30.9 2010/07/16 09:06
type : sun4v
ncpus probed : 24
ncpus active : 24
D$ parity tl1 : 0
I$ parity tl1 : 0
Cpu0ClkTck : 00000000457656f0
Cpu1ClkTck : 00000000457656f0
Cpu2ClkTck : 00000000457656f0
Cpu3ClkTck : 00000000457656f0
Cpu4ClkTck : 00000000457656f0
Cpu5ClkTck : 00000000457656f0
Cpu6ClkTck : 00000000457656f0
Cpu7ClkTck : 00000000457656f0
Cpu8ClkTck : 00000000457656f0
Cpu9ClkTck : 00000000457656f0
Cpu10ClkTck : 00000000457656f0
Cpu11ClkTck : 00000000457656f0
Cpu12ClkTck : 00000000457656f0
Cpu13ClkTck : 00000000457656f0
Cpu14ClkTck : 00000000457656f0
Cpu15ClkTck : 00000000457656f0
Cpu16ClkTck : 00000000457656f0
Cpu17ClkTck : 00000000457656f0
Cpu18ClkTck : 00000000457656f0
Cpu19ClkTck : 00000000457656f0
Cpu20ClkTck : 00000000457656f0
Cpu21ClkTck : 00000000457656f0
Cpu22ClkTck : 00000000457656f0
Cpu23ClkTck : 00000000457656f0
MMU Type : Hypervisor (sun4v)
State:
CPU0: online
CPU1: online
CPU2: online
CPU3: online
CPU4: online
CPU5: online
CPU6: online
CPU7: online
CPU8: online
CPU9: online
CPU10: online
CPU11: online
CPU12: online
CPU13: online
CPU14: online
CPU15: online
CPU16: online
CPU17: online
CPU18: online
CPU19: online
CPU20: online
CPU21: online
CPU22: online
CPU23: online
root@T5240:~#
My question is very simple, why the cat /proc/cpuinfo command said me that it
only see 24 cores? It not should be 16 cores?(in case of 2 Physical CPUs x 8
Cores) Or 64 cores?(in case of 2 Physical CPUs x 8 Cores x 8 threads)
Thanks for your help!!
Best Regards,
Andrés Durán
--
To UNSUBSCRIBE, email to [email protected]
with a subject of "unsubscribe". Trouble? Contact [email protected]
Archive: http://lists.debian.org/[email protected]
