Hi Andrés
What does
grep "CONFIG_NR_CPUS" /boot/config-$(uname -r)
say? You might need to recompile your kernel increasing this value.
Regards, Adrian.
On 2/13/12 10:17 AM, Andrés Durán wrote:
> Dear all,
>
> I have a SUN SPARC T5240, in Oracle web site the specification of this
> machine said that it comes with two phisical CPU's with 8 cores by cpu and 8
> threads by core. In Debian GNU/Linux 6.0 with kernel version "Linux T5240
> 2.6.32-5-sparc64-smp #1 SMP Mon Jan 16 17:28:56 UTC 2012 sparc64 GNU/Linux"
> the info of the cpu said that: root@T5240:~# cat /proc/cpuinfo
> cpu : UltraSparc T2 (Niagara2)
> fpu : UltraSparc T2 integrated FPU
> pmu : niagara2
> prom : OBP 4.30.9 2010/07/16 09:06
> type : sun4v
> ncpus probed : 24
> ncpus active : 24
> D$ 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
>
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