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Atom C2750, frequency problem.
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Atom C2750, frequency problem.

I bought this server:

https://www.online.net/fr/serveur-dedie/dedibox-limited33816

The processor has a frequency of 2.4 GHz.

If I go to putty, and I do:

cat /proc/cpuinfo

I have 7 core to "1200 MHz", and 1 core, to "2400 MHz"

Why ?

My problem is that in Virtualizor, he sees that the processor is to "1200 MHz".

My Vps, also at 1200 Mhz.

thanks for the help

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 1200.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 8
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 1200.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 1
cpu cores : 8
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 1200.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 2
cpu cores : 8
apicid : 4
initial apicid : 4
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 1200.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 3
cpu cores : 8
apicid : 6
initial apicid : 6
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 4
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 1200.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 4
cpu cores : 8
apicid : 8
initial apicid : 8
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 5
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 2401.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 5
cpu cores : 8
apicid : 10
initial apicid : 10
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 6
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 1200.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 6
cpu cores : 8
apicid : 12
initial apicid : 12
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 77
model name : Intel(R) Atom(TM) CPU C2750 @ 2.40GHz
stepping : 8
microcode : 295
cpu MHz : 1200.000
cache size : 1024 KB
physical id : 0
siblings : 8
core id : 7
cpu cores : 8
apicid : 14
initial apicid : 14
fpu : yes
fpu_exception : yes
cpuid level : 11
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 pbe syscall nx rdtscp lm c onstant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf cpui d_faulting pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch i da arat epb dtherm tpr_shadow vnmi flexpriority ept vpid smep erms
bogomips : 4800.19
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

Comments

  • Webinium said: Why ?

    Check Turbo Mode/ Powersaving states are not interfering.

  • WebiniumWebinium Member
    edited October 2016

    @quadhost said:

    Webinium said: Why ?

    Check Turbo Mode/ Powersaving states are not interfering.

    I logged into IP KVM, to look in the bios.

    I can not change anything, I do not have the access privilege

  • ClouviderClouvider Member, Patron Provider
    edited October 2016

    That's a correct behaviour. As your CPU is idling it reduced the frequency to save power. When you really start using it, it will be bumped back to its nominal frequency, or higher with turbo. It's not recommended to change it. Be green. Don't waste.

    Thanked by 1BrianHarrison
  • Exactly if this is really boterhing you out then just run:

    /etc/init.d/cpuspeed stop

    and you will have permanent 2.4 GHz even if the server is idle, but I would recommend to leave it as is to save energy and make the server cooler.

    Thanked by 2vpsGOD joeri
  • open /etc/rc.local

    Insert:

    for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do [ -f $CPUFREQ ] || continue; echo -n performance > $CPUFREQ; done
  • xyzxyz Member

    Actually, according to Intel, the C2750 should boost up to 2.6GHz.

    Do you get that if you max out a single core?

  • Use this to find out: https://github.com/ajaiantilal/i7z

    I also got max. 2.4 GHz even when one core is max. loaded.

    Turbo is enabled on all cores.

  • Webmin shows;

    Processor information Intel(R) Atom(TM) CPU C2750 @ 2.40GHz, 8 cores

  • BrianHarrisonBrianHarrison Member, Patron Provider

    @xyz said:
    Actually, according to Intel, the C2750 should boost up to 2.6GHz.

    Do you get that if you max out a single core?

    It won't happen unless turbo boost is enabled in the BIOS.

  • disable ondemand feature or something called cpu scaleing

  • @BrianHarrison said:

    @xyz said:
    Actually, according to Intel, the C2750 should boost up to 2.6GHz.

    Do you get that if you max out a single core?

    It won't happen unless turbo boost is enabled in the BIOS.

    Turbo is enabled in BIOS

  • Thank you all for your help.

    The server is not for sale, but to learn.

    I learn a lot with your site.

    I tried:

    cat /proc/cpuinfo

    This works, but not if it restarts the server.

  • xyzxyz Member

    @Spacedust said:
    Turbo is enabled in BIOS

    Are you sure? It seems like it may not be on my server:

    analyzing CPU 7:
      driver: acpi-cpufreq
      CPUs which run at the same hardware frequency: 7
      CPUs which need to have their frequency coordinated by software: 7
      maximum transition latency: 10.0 us.
      hardware limits: 1.20 GHz - 2.40 GHz
      available frequency steps: 2.40 GHz, 2.40 GHz, 2.30 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz
      available cpufreq governors: powersave, conservative, userspace, ondemand, performance
      current policy: frequency should be within 1.20 GHz and 2.40 GHz.
                      The governor "ondemand" may decide which speed to use
                      within this range.
      current CPU frequency is 1.20 GHz (asserted by call to hardware).
    

    Interesting is that 2.40 GHz is written twice - I wonder if the first entry should've been 2.60 GHz if turbo was enabled.

    On a SC 2016, no frequency ranges are given and the CPU is locked to the base frequency of 1.7GHz - probably Online's BIOS doesn't support CPU scaling or turbo.

  • @xyz said:

    @Spacedust said:
    Turbo is enabled in BIOS

    Are you sure? It seems like it may not be on my server:

    analyzing CPU 7:
      driver: acpi-cpufreq
      CPUs which run at the same hardware frequency: 7
      CPUs which need to have their frequency coordinated by software: 7
      maximum transition latency: 10.0 us.
      hardware limits: 1.20 GHz - 2.40 GHz
      available frequency steps: 2.40 GHz, 2.40 GHz, 2.30 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz
      available cpufreq governors: powersave, conservative, userspace, ondemand, performance
      current policy: frequency should be within 1.20 GHz and 2.40 GHz.
                      The governor "ondemand" may decide which speed to use
                      within this range.
      current CPU frequency is 1.20 GHz (asserted by call to hardware).
    

    Interesting is that 2.40 GHz is written twice - I wonder if the first entry should've been 2.60 GHz if turbo was enabled.

    On a SC 2016, no frequency ranges are given and the CPU is locked to the base frequency of 1.7GHz - probably Online's BIOS doesn't support CPU scaling or turbo.

    Try this:

    cpufreq-set -r -g performance

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