mark.schmidt/Exercises_MarkusSchmidt
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Ex8 and minor improvements

Browse source
This commit is contained in:
Markus Schmidt 2025-11-12 02:04:18 +01:00
commit 77bc8c6aa3
50 changed files with 214845 additions and 43 deletions
Download patch file Download diff file Expand all files Collapse all files

43
sheet3/7/benchmark.cpp Normal file
View file

@ -0,0 +1,43 @@
#include <iostream>
#include <vector>
#include <cmath>
using namespace std;
#include <cblas.h>
// Inner product
double benchmark_A(const vector<double> &x, const vector<double> &y)
{
return cblas_ddot(x.size(),x.data(),1,y.data(),1);
}
//Matrix-vector product
vector<double> benchmark_B(const vector<double> &A, const vector<double> &x)
{
unsigned int N = x.size();
unsigned int M = A.size() / N;
vector<double> b(M, 0.0);
cblas_dgemv(CblasRowMajor,CblasNoTrans,M,N,1,A.data(),N,x.data(),1,0.0,b.data(),1);
return b;
}
//Matrix-Matrix product
vector<double> benchmark_C(const vector<double> &A, const vector<double> &B, unsigned int M)
{
unsigned int L = A.size()/M;
unsigned int N = B.size()/L;
vector<double> C(M*N,0.0);
cblas_dgemm(CblasRowMajor,CblasNoTrans,CblasNoTrans,M,N,L,1.0,A.data(),L,B.data(),N,0.0,C.data(),N);
return C;
}