*

SCR3.1/devoir27/ex2/helpers.c

@@ -0,0 +1,19 @@
+#include "helpers.h"
+#include <signal.h>
+#include <time.h>
+
+int set_signal_handler(int signo, void (*handler)(int)) {
+    struct sigaction sa;
+    sa.sa_handler = handler;    // call `handler` on signal
+    sigemptyset(&sa.sa_mask);   // don't block other signals in handler
+    sa.sa_flags = SA_RESTART;            //  restart system calls
+    return sigaction(signo, &sa, NULL);
+}
+
+double tstamp(void) {                                                                                    
+	struct timespec tv;
+	clock_gettime(CLOCK_REALTIME, &tv);
+	return tv.tv_sec + tv.tv_nsec * 1.0e-9;
+}
+
+

SCR3.1/devoir27/ex2/helpers.h

@@ -0,0 +1,7 @@
+#ifndef _HELPERS_H
+#define _HELPERS_H
+
+int set_signal_handler(int signo, void (*handler)(int));
+double tstamp(void);
+
+#endif

SCR3.1/devoir27/ex2/vcachetest.c

@@ -0,0 +1,95 @@
+#include <stdint.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <x86intrin.h>
+#include <signal.h>
+#include "helpers.c"
+#include "helpers.h"
+
+
+#define PLSIZE 63
+
+
+
+struct lst {
+  struct lst * next;
+  long int payload[PLSIZE];
+}  l;
+
+
+struct lst * mkws(int size) 
+{
+	int i,j;
+	struct lst * ws0,*ws;
+
+	if (size == 0) 
+		return NULL;
+
+	srand(time(0));
+	ws = calloc(1,sizeof(struct lst));
+	ws->next = NULL;
+
+	for (i=0;i<PLSIZE;i++) 
+		ws->payload[i]=(rand())%2;
+
+	for (j=1;j<size;j++) {
+		ws0=ws;
+		ws = calloc(1,sizeof(struct lst));
+		if (ws==NULL) {
+			fprintf(stderr,"Can't add element...\n");
+			exit(1);
+		}
+		for (i=0;i<PLSIZE;i++) 
+			ws->payload[i]=(rand())%2;
+		ws->next = ws0;
+	}
+	return ws;
+}
+
+long int z = 0;
+
+void kill_prg(int){
+	printf("Nombre de tests effectués: %ld\n", z);
+}
+
+int main(int argc, char ** argv) 
+{
+	struct lst * ws, * ws0;
+
+	long long int start, end, dif;
+
+	long int i, x, size, it;
+
+	if (argc != 3) {
+		printf("Usage: %s <list size> <iterations>\n",argv[0]);
+		exit(1);
+	}
+	set_signal_handler(SIGTSTP, &kill_prg);
+	size=strtol(argv[1],NULL,0);
+
+	ws = mkws(size);
+	if (ws == NULL) {
+		printf("NIL list created...\n");
+		exit(1);
+	}
+
+	it = strtol(argv[2],NULL,0);
+
+	start = __rdtsc(); 
+	for (i = 0; i < it; i++) {
+		ws0 = ws;
+		while (ws0 != NULL) {
+			x = ws0->payload[3];
+			x++;
+			z++;
+			ws0 = ws0->next;
+		}
+	}
+	end = __rdtsc();
+
+	dif = end - start;
+	printf("Cycles/element = %lf\n", ((double) dif)/((double) size*it));
+	exit(0);
+}