The objective of this TP is to discover what performance measurement is. To do this, we must to use 3 basic functions and use their implementations. From the most basic to optimized versions, we have to implement and measure dgemm, reduc and dotprod.
For this TP, we must show our results, written in C or assembler, with gnuplot.
- ICX compiler intel compiler
- CBLAS
- Gnuplot
- cpupower
To download all dependencies, first look on repositories
To compare all data collected, we have to know what the CPU is. According to it's features, datas can evolved. It's why, as we want all the time the same data, i prepared a script to collect the right information about the CPU.
To run this script, ./cpu_info.sh CPU_NAME and give it the name of the CPU
ex : ./cpu_info.sh i7_6700k and datas will save in i7_6700k.txt
Unit tests have been implemented to easily check the functions.
To try them, run make test in the root repertory of the project
Before running this project,chect that the cpu frequency is stable by using cpupower
sudo cpupower frequency-info
if you have the option userspace in gouvernor, run
sudo cpupower frequency-set -f FREQ where FREQ is the higher frequency avaible.
else run
sudo cpupower frequency-set -g performance
To run the project, first verify that you own the dependencies !
After you only have to run the script ./script.sh
when this will be done, run the gnuplot script with your CPU name.
Example :./gnuplot_one.sh i7-1165G7
basic implementation
double dotprod_base(double *restrict a, double *restrict b, long long n)
{
double d = 0.0;
for (long long i = 0; i < n; i++)
d += a[i] * b[i];
return d;
}basic implementation
double reduc_base(double *restrict a, long long n)
{
double d = 0.0;
for (long long i = 0; i < n; i++)
d += a[i];
return d;
}basic implementation
void dgemm_ijk(double *restrict a, double *restrict b, double *restrict c, long long n)
{
for (long long i = 0; i < n; i++)
for (long long j = 0; j < n; j++)
for (long long k = 0; k < n; k++)
c[i * n + j] += a[i * n + k] * b[k * n + j];
}
