So, even if you choose the performance governor you will see two speeds, the minimum and maximum - but the minimum frequency is really meaningless, as the CPU isn't doing anything because it is in a c-state. When a processor is idle and in a c-state, it will report the minimum frequency for that processor, generally as seen in available_scaling_frequencies. You can test if you get the same results when your system is under load, if the frequency does not change then you are using a Power savings governor and that is keeping your CPU's frequency at 933Mhz all the time.ĬPU frequencies are even more complicated with turbo and c-states. You CPUs maximum frequency is 2.13Ghz but unless your Kernel governor is set to Performance your system will, most of it's idle time, lower that frequency.ĩ33Mhz is the lowest stepping available for your CPU and means probably that your system is not under heavy stress at the moment or it is using a power savings governor. The governor "ondemand" may decide which speed to useĬpufreq stats: 3.00 GHz:10.45%, 2.30 GHz:0.29%, 1.80 GHz:1.72%, 800 MHz:87.55% (28605)įor more information on how to check and set your CPU stepping from the command line I have created an answer to another question that explains how to do so here, have a look. It returns something like cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009ĬPUs which run at the same hardware frequency: 0ĬPUs which need to have their frequency coordinated by software: 0Īvailable frequency steps: 3.00 GHz, 2.30 GHz, 1.80 GHz, 800 MHzĪvailable cpufreq governors: conservative, ondemand, userspace, powersave, performanceĬurrent policy: frequency should be within 800 MHz and 3.00 GHz. Normally those are set to On Demmand by default which means your CPU's frequency will be lowered when not under intensive usage.Ĭpufreq-info is an utility to check the steps available from your CPU, which kernel governor is in use currently per core of your CPU and much more information about your CPU capabilities. Linux uses governors to set which stepping your CPU will operate (if your CPU supports stepping settings). Here are two webpages which could be of interest: Is the correct one? Is the 2.13 GHz a refer to the sum of the frequencies of the cores?įinally, which of these frequency tells me about the cycles per second / clock ticks per second taken by my system clock?ĮDIT: In a small extension to Bruno Pereira's nice answer, I found that making a processor operate at different frequencies on the fly is also dynamic frequency scaling or cpu throttling. The processor frequency here is 2.13 GHz on the first line and 933 Mhz on the second. What I don't get are the lines marked: model name : Intel(R) Core(TM) i3 CPU M 330 2.13GHz Model name : Intel(R) Core(TM) i3 CPU M 330 2.13GHzįlags : 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 nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpidĪddress sizes : 36 bits physical, 48 bits virtual Here is the end of the output of the command cat /proc/cpuinfo: processor : 3 I was looking at my processor SPECS on my Ubuntu Linux 11.10 system.
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