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So I am using a Xeon 2620 v4 through ssh/command line only. I have sudo access and have set all CPU governor to performance mode.

However, when I set the frequency using: "sudo cpufreq-set -f 2100" the clock speed of each CPU core is all over the places. Some gets 1.3ghz, some 1.9, some 2.5 3.0, ...

Is there anyway to set one frequency for them all?

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  • Does this answer your question? The performance governor with an HWP (HardWare P-state) capable processor (which you have, I think) should be stable enough for any applications, as it will settle quickly to the requested max CPU frequency. You can use percent to set the max freq: example: echo 70 | sudo tee /sys/devices/system/cpu/intel_pstate/max_perf_pct. You can set 2.1 GHz as max by disabling turbo. Sep 7, 2020 at 14:25
  • I have the error "/sys/devices/system/cpu/intel_pstate/no_turbo: No such file or directory 1" when I type "echo 1 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo". Or error " tee: /sys/devices/system/cpu/intel_pstate/no_turbo: No such file or directory "
    – Duke Le
    Sep 7, 2020 at 15:04
  • Oh. Are you not running the default intel_pstate CPU frequency scaling driver? Do: grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver Sep 7, 2020 at 15:16
  • The answers here cover both methods of disabling turbo, one (mine) for intel_pstate, and one for acpi-cpufreq. Sep 7, 2020 at 15:24
  • the command you gave me show "scaling_driver: pcc-cpufreq" at the end. What does that mean?
    – Duke Le
    Sep 7, 2020 at 15:25

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