diff --git a/fftma_module/gen/lib_src/Py_kgeneration.c b/fftma_module/gen/lib_src/Py_kgeneration.c
index d7c7b05..7791ce6 100644
--- a/fftma_module/gen/lib_src/Py_kgeneration.c
+++ b/fftma_module/gen/lib_src/Py_kgeneration.c
@@ -20,6 +20,9 @@
 /* Y is the realization with mean and variance wanted */
 
 void Py_kgeneration(long seed, struct grid_mod grid, struct statistic_mod stat, struct vario_mod variogram, struct realization_mod* Z, struct realization_mod* Y, int n[3], int cores) { 
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
  
     int i, N;
@@ -62,17 +65,11 @@ void Py_kgeneration(long seed, struct grid_mod grid, struct statistic_mod stat,
         log_info("CPU %d: %lf%%\n", i, calculate_load(&initial[i], &final[i]));
     }
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
-
-    free(total_ram);
-    free(used_ram);
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
     
-    log_info("RESULT = success, ELAPSED = %f seconds", time_taken);
+    log_info("RESULT = success, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
+
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/build_real.c b/fftma_module/gen/lib_src/build_real.c
index 8e541c2..44624f9 100644
--- a/fftma_module/gen/lib_src/build_real.c
+++ b/fftma_module/gen/lib_src/build_real.c
@@ -21,11 +21,11 @@
 /*ireal: vector defining the i-part   */
 
 void build_real(int n[3], int NTOT, double* covar, double* realization, double* ireal) {
-    clock_t t = clock();
-
     double* used_ram_t0 = malloc(sizeof(double));
     getVirtualMemUsed(used_ram_t0);
 
+    clock_t t = clock();
+
     int i, j, k, maille1;
     double temp;
     log_info("RESULT = in progress, NTOT = %d, covar = %f, n[0] = %d, n[1] = %d, n[2] = %d", NTOT, *covar, n[0], n[1], n[2]);
@@ -53,7 +53,7 @@ void build_real(int n[3], int NTOT, double* covar, double* realization, double*
     double* used_ram_tf = malloc(sizeof(double));
     getVirtualMemUsed(used_ram_tf);
 
-    log_info("RESULT = success, realization = %f, ireal = %f, ELAPSED = %f seconds, USED VIRTUAL MEM = %5.1f MB, DIF USED VIRTUAL MEM = %5.1f MB", *realization, *ireal, time_taken, *used_ram_tf, *used_ram_tf - *used_ram_t0);
+    log_info("RESULT = success, realization = %f, ireal = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", *realization, *ireal, time_taken, *used_ram_tf - *used_ram_t0);
 
     free(used_ram_t0);
     free(used_ram_tf);
diff --git a/fftma_module/gen/lib_src/cardsin.c b/fftma_module/gen/lib_src/cardsin.c
index 60ec7f1..64f3462 100644
--- a/fftma_module/gen/lib_src/cardsin.c
+++ b/fftma_module/gen/lib_src/cardsin.c
@@ -6,6 +6,9 @@
 
 /*cardsin covariance function*/
 double cardsin(double h) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress, h = %f", h);
@@ -23,19 +26,13 @@ double cardsin(double h) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, z = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", z, time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, z = %f, ELAPSED = %f seconds", z, time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 
     return z;
 }
diff --git a/fftma_module/gen/lib_src/cgrid.c b/fftma_module/gen/lib_src/cgrid.c
index 50ba621..ce61a3d 100644
--- a/fftma_module/gen/lib_src/cgrid.c
+++ b/fftma_module/gen/lib_src/cgrid.c
@@ -12,6 +12,9 @@
 /*   X, Y and Z axes for the underlying grid       */
 /*   i = [0 1 2]                                   */
 void cgrid(struct vario_mod variogram, struct grid_mod grid, int n[3]) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     int i, N;
@@ -19,6 +22,7 @@ void cgrid(struct vario_mod variogram, struct grid_mod grid, int n[3]) {
     
     log_info("RESULT = in progress");
 
+
     if (n == NULL || n[0] == 0 || n[1] == 0 || n[2] == 0) {
         for (i = 0; i < 3; i++) {
             switch (i) {
@@ -47,17 +51,11 @@ void cgrid(struct vario_mod variogram, struct grid_mod grid, int n[3]) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, n[0] = %d, n[1] = %d, n[2] = %d, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", n[0], n[1], n[2], time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, n[0] = %d, n[1] = %d, n[2] = %d, ELAPSED = %f seconds", n[0], n[1], n[2], time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/clean_real.c b/fftma_module/gen/lib_src/clean_real.c
index 3c3295d..4d4982e 100644
--- a/fftma_module/gen/lib_src/clean_real.c
+++ b/fftma_module/gen/lib_src/clean_real.c
@@ -9,6 +9,9 @@
 #include <time.h>
 
 void clean_real(struct realization_mod* realin, int n[3], struct grid_mod grid, double* vectorresult, struct realization_mod* realout) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     int i, j, k, maille0, maille1;
@@ -45,17 +48,11 @@ void clean_real(struct realization_mod* realin, int n[3], struct grid_mod grid,
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, ELAPSED = %f seconds", time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/cov_value.c b/fftma_module/gen/lib_src/cov_value.c
index 412c872..31327bb 100644
--- a/fftma_module/gen/lib_src/cov_value.c
+++ b/fftma_module/gen/lib_src/cov_value.c
@@ -6,6 +6,9 @@
 
 /*selection of model covariance*/
 double cov_value(struct vario_mod variogram, double di, double dj, double dk) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress, di = %f, dj = %f, dk = %f", di, dj, dk);
@@ -57,19 +60,13 @@ double cov_value(struct vario_mod variogram, double di, double dj, double dk) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, hx = %f, hy = %f, hz = %f, h = %f, cov = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", hx, hy, hz, h, cov, time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, hx = %f, hy = %f, hz = %f, h = %f, cov = %f, ELAPSED = %f seconds", hx, hy, hz, h, cov, time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 
     return cov;
 }
diff --git a/fftma_module/gen/lib_src/covariance.c b/fftma_module/gen/lib_src/covariance.c
index 5ec8ced..5dc256c 100644
--- a/fftma_module/gen/lib_src/covariance.c
+++ b/fftma_module/gen/lib_src/covariance.c
@@ -5,6 +5,9 @@
 /*builds the sampled covariance function*/
 /*dimensions are even*/
 void covariance(double* covar, struct vario_mod variogram, struct grid_mod mesh, int n[3]) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+    
     clock_t t = clock();
     
     int i, j, k, maille, n2[3], symmetric;
@@ -83,17 +86,11 @@ void covariance(double* covar, struct vario_mod variogram, struct grid_mod mesh,
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, di = %f, dj = %f, dk = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", di, dj, dk, time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, di = %f, dj = %f, dk = %f, ELAPSED = %f seconds", di, dj, dk, time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/cubic.c b/fftma_module/gen/lib_src/cubic.c
index 38c7ed2..ac0439b 100644
--- a/fftma_module/gen/lib_src/cubic.c
+++ b/fftma_module/gen/lib_src/cubic.c
@@ -6,6 +6,9 @@
 
 /*cubic covariance function*/
 double cubic(double h) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress, h = %f", h);
@@ -21,19 +24,13 @@ double cubic(double h) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, z = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", z, time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, z = %f, ELAPSED = %f seconds", z, time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 
     return z;
 }
diff --git a/fftma_module/gen/lib_src/fftma2.c b/fftma_module/gen/lib_src/fftma2.c
index c35ac00..bf4b9de 100644
--- a/fftma_module/gen/lib_src/fftma2.c
+++ b/fftma_module/gen/lib_src/fftma2.c
@@ -24,11 +24,11 @@
 /*realout: structure defining a realization -  */
 
 void FFTMA2(struct vario_mod variogram, struct grid_mod grid, int n[3], struct realization_mod* realin, struct realization_mod* realout) {
-    clock_t t = clock();
-
     double* used_ram_t0 = malloc(sizeof(double));
     getVirtualMemUsed(used_ram_t0);
     
+    clock_t t = clock();
+    
     log_info("RESULT = in progress");
 
     int NTOT, i, j, k, NMAX, NDIM, ntot, nmax, NXYZ, nxyz;
@@ -107,7 +107,7 @@ void FFTMA2(struct vario_mod variogram, struct grid_mod grid, int n[3], struct r
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    log_info("RESULT = success, NTOT = %d, NMAX = %d, NDIM = %d, ntot = %d, nmax = %d, NXYZ = %d, nxyz = %d, ELAPSED = %f seconds, USED VIRTUAL MEM = %5.1f MB, DIF USED VIRTUAL MEM = %5.1f MB", NTOT, NMAX, NDIM, ntot, nmax, NXYZ, nxyz, time_taken, *used_ram_tf, *used_ram_tf - *used_ram_t0);
+    log_info("RESULT = success, NTOT = %d, NMAX = %d, NDIM = %d, ntot = %d, nmax = %d, NXYZ = %d, nxyz = %d, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", NTOT, NMAX, NDIM, ntot, nmax, NXYZ, nxyz, time_taken, *used_ram_tf - *used_ram_t0);
 
     free(used_ram_t0);
     free(used_ram_tf);
diff --git a/fftma_module/gen/lib_src/fourt.c b/fftma_module/gen/lib_src/fourt.c
index f54d52a..eb88520 100644
--- a/fftma_module/gen/lib_src/fourt.c
+++ b/fftma_module/gen/lib_src/fourt.c
@@ -92,6 +92,9 @@
 /*     10-06-2000, MLR                                                     */
 
 void fourt(double* datar, double* datai, int nn[3], int ndim, int ifrwd, int icplx, double* workr, double* worki) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress");
@@ -590,18 +593,11 @@ L920:
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
-
-    free(total_ram);
-    free(used_ram);
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
+    
+    log_info("RESULT = success, ELAPSED = %f, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
     
-    log_info("RESULT = success, ELAPSED = %f", time_taken);
-    return;
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/gammf.c b/fftma_module/gen/lib_src/gammf.c
index eb98587..2b3aac8 100644
--- a/fftma_module/gen/lib_src/gammf.c
+++ b/fftma_module/gen/lib_src/gammf.c
@@ -6,6 +6,9 @@
 
 /*gamma covariance function*/
 double gammf(double h, double alpha) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+    
     clock_t t = clock();
 
     log_info("RESULT = in progress, h = %f, alpha = %f", h, alpha);
@@ -19,18 +22,13 @@ double gammf(double h, double alpha) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
 
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
-
-    free(total_ram);
-    free(used_ram);
-
-    log_info("RESULT = success, delta = %f, z = %f, ELAPSED = %f seconds", delta, z, time_taken);
+    log_info("RESULT = success, delta = %f, z = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", delta, z, time_taken, *used_ram_tf - *used_ram_t0);
+    
+    free(used_ram_t0);
+    free(used_ram_tf);
+    
     return z;
 }
diff --git a/fftma_module/gen/lib_src/gasdev.c b/fftma_module/gen/lib_src/gasdev.c
index 2da6775..a860f96 100644
--- a/fftma_module/gen/lib_src/gasdev.c
+++ b/fftma_module/gen/lib_src/gasdev.c
@@ -9,6 +9,9 @@ double gasdev(long* idum, long* idum2, long* iy, long iv[NTAB]) {
     /*returns a normally distributed deviate with 0 mean*/
     /*and unit variance, using ran2(idum) as the source */
     /*of uniform deviates                               */
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress, idum = %f, idum2 = %f, iy = %f", *idum, *idum2, *iy);
@@ -32,19 +35,14 @@ double gasdev(long* idum, long* idum2, long* iy, long iv[NTAB]) {
         t = clock() - t;
         double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-        double* total_ram = malloc(sizeof(double));
-        getTotalVirtualMem(total_ram);
-
-        double* used_ram = malloc(sizeof(double));
-        getVirtualMemUsed(used_ram);
+        double* used_ram_tf = malloc(sizeof(double));
+        getVirtualMemUsed(used_ram_tf);
 
-        log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-        *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+        log_info("RESULT = success, gset = %f, fac = %f, v1 = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", gset, fac, v1, time_taken, *used_ram_tf - *used_ram_t0);
 
-        free(total_ram);
-        free(used_ram);
+        free(used_ram_t0);
+        free(used_ram_tf);
 
-        log_info("RESULT = success, gset = %f, fac = %f, v1 = %f, ELAPSED = %f seconds", gset, fac, v1, time_taken);
         return (v2 * fac);
     } else {
         iset = 0;
@@ -52,19 +50,14 @@ double gasdev(long* idum, long* idum2, long* iy, long iv[NTAB]) {
         t = clock() - t;
         double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-        double* total_ram = malloc(sizeof(double));
-        getTotalVirtualMem(total_ram);
-
-        double* used_ram = malloc(sizeof(double));
-        getVirtualMemUsed(used_ram);
+        double* used_ram_tf = malloc(sizeof(double));
+        getVirtualMemUsed(used_ram_tf);
 
-        log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-        *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+        log_info("RESULT = success, gset = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", gset, time_taken, *used_ram_tf - *used_ram_t0);
 
-        free(total_ram);
-        free(used_ram);
+        free(used_ram_t0);
+        free(used_ram_tf);
 
-        log_info("RESULT = success, gset = %f, ELAPSED = %f seconds", gset, time_taken);
         return gset;
     }
 }
diff --git a/fftma_module/gen/lib_src/generate.c b/fftma_module/gen/lib_src/generate.c
index f4a395f..e325368 100644
--- a/fftma_module/gen/lib_src/generate.c
+++ b/fftma_module/gen/lib_src/generate.c
@@ -13,6 +13,9 @@
 /* realization: structure defining the realization*/
 
 void generate(long* seed, int n, struct realization_mod* realization, int cores) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress, n = %d", n);
@@ -59,19 +62,13 @@ void generate(long* seed, int n, struct realization_mod* realization, int cores)
         log_info("CPU %d: %lf%%\n", i, calculate_load(&initial[i], &final[i]));
     }
 
-    free(iv);
-
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    free(iv);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, ELAPSED = %f seconds", time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/length.c b/fftma_module/gen/lib_src/length.c
index 6c4a759..f7bbdbf 100644
--- a/fftma_module/gen/lib_src/length.c
+++ b/fftma_module/gen/lib_src/length.c
@@ -4,6 +4,9 @@
 
 /* compute the length for one dimension*/
 int length(int N, int i, double* scf, double* ap, double D, int Nvari) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress, N = %d, i = %d, D = %f, Nvari = %d", N, i, D, Nvari);
@@ -44,18 +47,13 @@ int length(int N, int i, double* scf, double* ap, double D, int Nvari) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    log_info("RESULT = success, n = %d, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", n, time_taken, *used_ram_tf - *used_ram_t0);
 
-    free(total_ram);
-    free(used_ram);
+    free(used_ram_t0);
+    free(used_ram_tf);
 
-    log_info("RESULT = success, n = %d, ELAPSED = %f seconds", n, time_taken);
     return n;
 }
diff --git a/fftma_module/gen/lib_src/maxfactor.c b/fftma_module/gen/lib_src/maxfactor.c
index cda2bfd..5aafcb2 100644
--- a/fftma_module/gen/lib_src/maxfactor.c
+++ b/fftma_module/gen/lib_src/maxfactor.c
@@ -3,6 +3,9 @@
 
 /*determines the greatest prime factor of an integer*/
 int maxfactor(int n) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress, n = %d", n);
@@ -39,18 +42,13 @@ int maxfactor(int n) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, maxfac = %d, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", maxfac, time_taken, *used_ram_tf - *used_ram_t0);
+        
+    free(used_ram_t0);
+    free(used_ram_tf);
 
-    log_info("RESULT = success, maxfac = %d, ELAPSED = %f seconds", maxfac, time_taken);
     return maxfac;
 }
diff --git a/fftma_module/gen/lib_src/memory.c b/fftma_module/gen/lib_src/memory.c
index 40b2904..1559e71 100644
--- a/fftma_module/gen/lib_src/memory.c
+++ b/fftma_module/gen/lib_src/memory.c
@@ -24,7 +24,7 @@ void getVirtualMemUsed(double* used_ram) {
     const double megabyte = 1024 * 1024;
     struct sysinfo si;
     sysinfo(&si);
-    *used_ram = si.freeram / megabyte;
+    *used_ram = (si.totalram - si.freeram) / megabyte;
 }
 
 int parseLine(char* line) {
diff --git a/fftma_module/gen/lib_src/nor2log.c b/fftma_module/gen/lib_src/nor2log.c
index af17aa1..2e96e68 100644
--- a/fftma_module/gen/lib_src/nor2log.c
+++ b/fftma_module/gen/lib_src/nor2log.c
@@ -15,6 +15,9 @@
 /*         lognormal numbers                    */
 
 void nor2log(struct realization_mod* realin, int typelog, struct realization_mod* realout) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     log_info("RESULT = in progress");
@@ -75,17 +78,11 @@ void nor2log(struct realization_mod* realin, int typelog, struct realization_mod
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    free(total_ram);
-    free(used_ram);
+    log_info("RESULT = success, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("RESULT = success, ELAPSED = %f seconds", time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/prebuild_gwn.c b/fftma_module/gen/lib_src/prebuild_gwn.c
index be1f3bb..f4cd850 100644
--- a/fftma_module/gen/lib_src/prebuild_gwn.c
+++ b/fftma_module/gen/lib_src/prebuild_gwn.c
@@ -22,6 +22,9 @@
 /*realization: structure defining a realization*/
 
 void prebuild_gwn(struct grid_mod grid, int n[3], struct realization_mod* realin, double* realization, int solver) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+    
     clock_t t = clock();
 
     int i, j, k, maille0, maille1;
@@ -54,17 +57,11 @@ void prebuild_gwn(struct grid_mod grid, int n[3], struct realization_mod* realin
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
+    log_info("RESULT = success, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
 
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
-
-    free(total_ram);
-    free(used_ram);
-
-    log_info("RESULT = success, ELAPSED = %f seconds", time_taken);
+    free(used_ram_t0);
+    free(used_ram_tf);
 }
diff --git a/fftma_module/gen/lib_src/ran2.c b/fftma_module/gen/lib_src/ran2.c
index 79a564e..6c582bb 100644
--- a/fftma_module/gen/lib_src/ran2.c
+++ b/fftma_module/gen/lib_src/ran2.c
@@ -18,6 +18,9 @@
 #define RNMX (1.0 - EPS)
 
 double ran2(long* idum, long* idum2, long* iy, long iv[NTAB]) {
+    double* used_ram_t0 = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_t0);
+
     clock_t t = clock();
 
     int j;
@@ -60,24 +63,18 @@ double ran2(long* idum, long* idum2, long* iy, long iv[NTAB]) {
     t = clock() - t;
     double time_taken = ((double)t)/CLOCKS_PER_SEC; // calculate the elapsed time
 
-    double* total_ram = malloc(sizeof(double));
-    getTotalVirtualMem(total_ram);
-
-    double* used_ram = malloc(sizeof(double));
-    getVirtualMemUsed(used_ram);
-
-    log_info("TOTAL VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM = %5.1f MB, USED VIRTUAL MEM BY CURRENT PROCESS = %d MB", 
-    *total_ram, *used_ram, getVirtualMemUsedByCurrentProcess());
-
-    free(total_ram);
-    free(used_ram);
+    double* used_ram_tf = malloc(sizeof(double));
+    getVirtualMemUsed(used_ram_tf);
 
     if ((temp = AM * (*iy)) > RNMX) {
-        log_info("RESULT = success, ELAPSED = %f", time_taken);
+        log_info("RESULT = success, ELAPSED = %f, DIF USED VIRTUAL MEM = %5.1f MB", time_taken, *used_ram_tf - *used_ram_t0);
         return (RNMX);
     }
     else {
-        log_info("RESULT = success, temp = %f, ELAPSED = %f seconds", temp, time_taken);
+        log_info("RESULT = success, temp = %f, ELAPSED = %f seconds, DIF USED VIRTUAL MEM = %5.1f MB", temp, time_taken, *used_ram_tf - *used_ram_t0);
         return temp;        
     }
+
+    free(used_ram_t0);
+    free(used_ram_tf);
 }