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Q6: profiling info and preperation

master
parent
commit
5719ab0b46
3 changed files with 69 additions and 45 deletions
  1. +1
    -1
      Q6-cache/Makefile
  2. +9
    -0
      Q6-cache/info.txt
  3. +59
    -44
      Q6-cache/src/matmul.c

+ 1
- 1
Q6-cache/Makefile View File

@@ -112,7 +112,7 @@ debug: $(BUILD_DIR)/$(TARGET)

.PHONY: release
release: CFLAGS += $(REL_FLAGS)
release: clean $(BUILD_DIR)/$(TARGET)
release: $(BUILD_DIR)/$(TARGET)


.PHONY: all


+ 9
- 0
Q6-cache/info.txt View File

@@ -0,0 +1,9 @@
Επεξεργαστής: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Συχνότητα επεξεργαστή: 800 - 2600 MHz
Μέγεθος μνήμης L1: 192 KiB / 192 KiB (L1d/L1i)
Μέγεθος μνήμης L2: 1.5 MiB
Μέγεθος μνήμης L3: 12 MiB
Μέγεθος μνήμης RAM: 31893MiB
Έκδοση gcc: 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2)
Έκδοση Λειτουργικού Συστήματος: Ubuntu 19.10 x86_64


+ 59
- 44
Q6-cache/src/matmul.c View File

@@ -4,10 +4,10 @@

\author Nikos Pitsianis
\author Dimitris Floros
\author Christos Choutouridis 8997 <cchoutou@ece.auth.gr>
\date 2020-05-05
*/


#include <stdio.h>
#include <stdlib.h>
#include <math.h>
@@ -17,59 +17,67 @@
#define MAX_ITER 10
#define sub2ind(i,j,n) (j) + (i)*(n)

/*
* matrixMult - Matrix multiplication
/*!
* Square Matrix multiplication
* \param C pointer to output matrix
* \param A pointer to input matrix A
* \param B pointer to input matrix B
* \param n Size of matrices (both sizes)
* \return none
*
* \note
* This version executes row major order ijk
*/
void matrixMult(float * const C, /* output matrix */
float const * const A, /* first matrix */
float const * const B, /* second matrix */
int const n) { /* number of rows/cols */

for (int i = 0; i < n; i++) { /* rows */
for (int j = 0; j < n; j++) { /* cols */

/* initialize output value */
C[ sub2ind(i,j,n) ] = 0;

for (int k = 0; k < n; k++) { /* accumulate products */
C[ sub2ind(i,j,n) ] +=
A[ sub2ind(i,k,n) ] * B[ sub2ind(k,j,n) ];
void matrixMult(float * const C, float const * const A, float const * const B, int const n) {

for (int i = 0; i < n; i++) { /* rows */
for (int j = 0; j < n; j++) { /* cols */
C[ sub2ind(i,j,n) ] = 0; /* initialize output value */
for (int k = 0; k < n; k++) { /* accumulate products */
C[ sub2ind(i,j,n) ] +=
A[ sub2ind(i,k,n) ] * B[ sub2ind(k,j,n) ];
}
}
}
}
} // end function 'matrixMult'
}

/*
* matrixInitAdd:
* Initialize matrix with random indices and return the matrix
* pointer.
*
}

/*!
* Initialize matrix with random indices and return the matrix pointer.
*
* \param n The size of the matrix (both of them)
* \return Pointer to allocated and initialized matrix
*/
float * matrixInit(int const n) {

float *M = (float *) malloc( n*n*sizeof(float) );
for (int i = 0; i < n; i++) /* rows */
for (int j = 0; j < n; j++) /* cols */
M[ sub2ind(i,j,n) ] = (float)rand()/(float)(RAND_MAX);
float *M = (float *) malloc( n*n*sizeof(float) );

return M;
} // end function 'matrixInitAdd'
for (int i = 0; i < n; i++) /* rows */
for (int j = 0; j < n; j++) /* cols */
M[ sub2ind(i,j,n) ] = (float)rand()/(float)(RAND_MAX);

return M;
}

int cmpfunc (const void * a, const void * b) {
double v =*(double*)a - *(double*)b;
return (v < 0) ? -1 : (v > 0) ? 1 : 0;
}

/*!
* A unit testing like main function to profile our code
*/
int main(int argc, char **argv)
{

struct timeval start, end; /* time structs */
double time = 0.0; /* execution time in ms */
float *A, *B, *C; /* matrix declarations */
int n; /* matrix size */
struct timeval start, end; /* time structs */
double time[MAX_ITER] = {0.0}; /* execution time array in ms */
float *A, *B, *C; /* matrix declarations */
int n; /* matrix size */

/* read matrix size (or use default) */
if (argc != 2){
fprintf( stderr, "Uasge:\n %s n\n where n is the matrix size.\n",
fprintf( stderr, "Usage:\n %s n\n where n is the matrix size.\n",
argv[0]);
exit(1);
}
@@ -86,13 +94,13 @@ int main(int argc, char **argv)
matrixMult( C, A, B, n );
gettimeofday(&end, NULL);

time = ( (end.tv_sec - start.tv_sec) * 1000.0 + /* sec to ms */
(end.tv_usec - start.tv_usec) / 1000.0 ); /* us to ms */
time[it] = (end.tv_sec - start.tv_sec) * 1000.0 + /* sec to ms */
(end.tv_usec - start.tv_usec) / 1000.0; /* us to ms */
printf("Iter: %d Time: %f ms\n", it, time);
printf("Iter: %d Time: %f ms\n", it, time[it]);
}

/* we noeed to use the result -- verify it */
/* we need to use the result -- verify it */
for (int i = 0; i < n; i++) { /* rows */
for (int j = 0; j < n; j++) { /* cols */

@@ -106,5 +114,12 @@ int main(int argc, char **argv)
}
}

// median calculation
qsort ((void*)time, MAX_ITER, sizeof(time[0]), cmpfunc);
printf("Median: %f [msec]\n", (MAX_ITER % 2) ?
time[MAX_ITER/2] :
(time[MAX_ITER/2] + time[MAX_ITER/2 -1]) /2
);
}


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