[SOLVED] Some CPU cores appear to be offline, according to cpupower

miguel04685 · 2024-11-13 20:36:34

 [miguel@archmiguel ~]$ sudo cpupower frequency-set -g schedutil
[sudo] senha para miguel: 
Setting cpu: 0
Setting cpu: 1
Following CPUs are offline:
2-3
cpupower set operation was not performed on them
[miguel@archmiguel ~]$ lscpu
Arquitetura:                  x86_64
  Modo(s) operacional da CPU: 32-bit, 64-bit
  Tamanhos de endereço:       36 bits physical, 48 bits virtual
  Ordem dos bytes:            Little Endian
CPU(s):                       2
  Lista de CPU(s) on-line:    0,1
ID de fornecedor:             GenuineIntel
  Nome do modelo:             Intel(R) Celeron(R) CPU        E3300  @ 2.50GHz
    Família da CPU:           6
    Modelo:                   23
    Thread(s) per núcleo:     1
    Núcleo(s) por soquete:    2
    Soquete(s):               1
    Step:                     10
    CPU(s) scaling MHz:       49%
    CPU MHz máx.:             2500,0000
    CPU MHz mín.:             1200,0000
    BogoMIPS:                 5020,75
    Opções:                   fpu vme de pse tsc msr pae mce cx8 apic sep mtrr p
                              ge mca cmov pat pse36 clflush dts acpi mmx fxsr ss
                              e sse2 ht tm pbe syscall nx lm constant_tsc arch_p
                              erfmon pebs bts rep_good nopl cpuid aperfmperf pni
                               dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr
                               pdcm xsave lahf_lm pti tpr_shadow flexpriority vp
                              id dtherm vnmi
Recursos de virtualização:    
  Virtualização:              VT-x
Caches (soma de todos):       
  L1d:                        64 KiB (2 instâncias)
  L1i:                        64 KiB (2 instâncias)
  L2:                         1 MiB (1 instância)
NUMA:                         
  Nó(s) de NUMA:              1
  CPU(s) de nó0 NUMA:         0,1
Vulnerabilidades:             
  Gather data sampling:       Not affected
  Itlb multihit:              KVM: Mitigation: VMX disabled
  L1tf:                       Mitigation; PTE Inversion; VMX EPT disabled
  Mds:                        Vulnerable: Clear CPU buffers attempted, no microc
                              ode; SMT disabled
  Meltdown:                   Mitigation; PTI
  Mmio stale data:            Unknown: No mitigations
  Reg file data sampling:     Not affected
  Retbleed:                   Not affected
  Spec rstack overflow:       Not affected
  Spec store bypass:          Vulnerable
  Spectre v1:                 Mitigation; usercopy/swapgs barriers and __user po
                              inter sanitization
  Spectre v2:                 Mitigation; Retpolines; STIBP disabled; RSB fillin
                              g; PBRSB-eIBRS Not affected; BHI Not affected
  Srbds:                      Not affected
  Tsx async abort:            Not affected
[miguel@archmiguel ~]$

Last edited by miguel04685 (2024-11-14 14:13:36)

cryptearth · 2024-11-13 21:31:57

it's right in what you posted: SMT disabled
so you only have the physical core up but disabled HT due to mitigations

miguel04685 · 2024-11-13 21:43:34

How do I enable it?

cryptearth · 2024-11-13 23:32:29

disable the mds smt mitigation
or get something more modern - that chip is from Q3'09

miguel04685 · 2024-11-14 00:28:14

Is it safe to disable it?

seth · 2024-11-14 08:04:55

No. Life is not safe, get a helmet.

What is the anticipated thread scenario?

Is this a server? Does it host sensitive information?
Why would anyone attack you? Did you make jokes about some Dicktactor? (We're all gonna die, thanks America!)

Do you run pot. compromised software on that system?
Do other entities have access to the system (remote or local)?

miguel04685 · 2024-11-14 10:43:19

Okay, so security isn't much of a concern then. Now here's the question: does my processor support hyper threading, because according to Intel's website about the Intel Celeron E3300 CPU, hyperthreading technology is not supported.

cryptearth · 2024-11-14 11:31:01

well - what you provided seems to detect a total of 4 cores with 2 of them disabled due to disabled smt by mitigations
I don't know if the chip is HT capable or if it's a dual socket board or if it's just a mis-detection ...

... because you haven't told us anything but just posted that bit of console ouutput without even a question

so - for anyone here able to answer this question we need at least a brief overview of the system - noone here has a magic cloudy ball on thier tables (mine keeps breaking and hence usually is stuck at my local magic cloudy balls mechanic for repairs when such magic questions come up)

V1del · 2024-11-14 11:33:11

then it's probably because the board might support it in theory and trying to enable it which then leads to such messages. As you have the expected number of cores visible I'd not worry too much about the message.

seth · 2024-11-14 14:11:22

https://ark.intel.com/content/www/us/en … z-fsb.html
2 cores, no HT.
Also

    Thread(s) per núcleo:     1
    Núcleo(s) por soquete:    2

Cores 2 + 3 (3+4 in human count) are offline because they don't exist.

V1del wrote:

As you have the expected number of cores visible I'd not worry too much about the message.

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

miguel04685 · 2024-11-14 14:13:12

Oh ok, so the question is solved

Arch Linux

#1 2024-11-13 20:36:34

[SOLVED] Some CPU cores appear to be offline, according to cpupower

#2 2024-11-13 21:31:57

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#3 2024-11-13 21:43:34

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#4 2024-11-13 23:32:29

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#5 2024-11-14 00:28:14

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#6 2024-11-14 08:04:55

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#7 2024-11-14 10:43:19

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#8 2024-11-14 11:31:01

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#9 2024-11-14 11:33:11

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#10 2024-11-14 14:11:22

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

#11 2024-11-14 14:13:12

Re: [SOLVED] Some CPU cores appear to be offline, according to cpupower

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