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CoreFreq is a CPU monitoring software designed for 64-bits Processors w/ architectures Intel Atom, Core2, Nehalem, SandyBridge and superior, AMD Family 0F.

CoreFreq provides a framework for retrieving CPU data with a high degree of precision:

  • Core frequencies & ratios; SpeedStep (EIST), Turbo Boost, Hyper-Threading (HTT) and Base Clock
  • Performance counters including Time Stamp Counter (TSC), Unhalted Core Cycles (UCC),
  • Unhalted Reference Cycles (URC)
  • Number of instructions per cycle or second, IPS, IPC, or CPI
  • CPU C-States C0 C1 C3 C6 C7 – C1E – Auto/UnDemotion of C1 C3
  • DTS Temperature and Tjunction Max, Thermal Monitoring TM1 TM2 state
  • Topology map including Caches for boostrap & application CPU
  • Processor features, brand & architecture strings

To reach this goal, CoreFreq implements a Linux Kernel module which employs the followings:

  • asm code to keep as near as possible the readings of the performance counters;
  • per-CPU, implements slab data memory and high-resolution timer;
  • compliant with suspend/resume and CPU Hot-Plug;
  • a shared memory to protect the kernel from the user-space part of the software;
  • atomic synchronization of threads to avoid mutexes and deadlock.

How to install CoreFreq

First, install the prerequisite packages:

Now, clone and build CoreFreq source code from github:

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As root, change to the build directory then start the module followed by the daemon:

Then start the client, as user:

To see all usage options, type the command below:

For more information and usage, visit the CoreFreq Github repository: https://github.com/cyring/CoreFreq

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