advanced_DVFS

Linux shell script for advanced DVFS technique.

Set a maximum temperature, # of cores, maximum frequency of your devices.
It predicts the higest temperature of cores at different frequencies.
The highest one is adopted for CPU frequency.

We use linear-regression model.
The model was established using the following:

EXEC, IPC, FREQ, AFREQ, L3MPI, READ, WRITE,
INST, PhysIPC, INSTnom, Proc_Energy_(Joules), Total_Util, frequency

"Total_Util" is total utilization of cores.
"frequency" is current CPU frequency.
Other details are in PCM (Processor Counter Monitor) - https://github.com/opcm/pcm. 

This model is based on Intel i7-7700.
Thus, different types of servers may show slightly different prediction results.

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This script must be run with sudo privileges.

Installation

1. Install PCM (Processor Counter Monitor)

git clone https://github.com/opcm/pcm.git 

2. Download this project

git clone https://github.com/JeongIn/advanced_DVFS.git 

3. Move "pcm-pred_model.cpp" and "advanced_DVFS" to "pcm" folder

4. Modify "Makefile"

 EXE = pcm-pred_model.x 

5. Make

 make 

How to Use

1. super user mode

 su 

2. Start "pcm-pred_model"

cd pcm/
./pcm-pred_model.x 

3. Start "advanced_DVFS" with new terminal.
   [This example will limit system temperature to 50 Celsius (8 cores, Maximum frequency: 4.2GHz]

cd pcm/
./advanced_DVFS.sh 50 8 4200000