From: Laurent Mazet <mazet@softndesign.org>
Date: Sat, 27 Sep 2025 19:01:51 +0000 (+0200)
Subject: add thread test
X-Git-Url: https://secure.softndesign.org/git/?a=commitdiff_plain;h=0b3b43e21eb4c80beacca8cc790a28069cb9a039;p=benchmarks.git

add thread test
---

diff --git a/thread.c b/thread.c
new file mode 100644
index 0000000..70306a7
--- /dev/null
+++ b/thread.c
@@ -0,0 +1,55 @@
+/* depend: */
+/* cflags: */
+/* linker: mustime.o test.o stat.o -lm -lpthread */
+
+#include <pthread.h>
+#include <stdio.h>
+
+#include "mustime.h"
+#include "stat.h"
+#include "test.h"
+
+/* global variables */
+
+mustime_t *deltas = NULL;
+int nb_measurements = 0;
+
+void* dummy_thread(void *arg) {
+    (void)arg;
+    return NULL;
+}
+
+sec_t test (int64_t *buffer, int nb)
+{
+
+    /* set global variables */
+
+    deltas = buffer;
+    nb_measurements = nb;
+
+    pthread_t posix_t;
+    pthread_attr_t attr;
+    struct sched_param param;
+
+    pthread_attr_init(&attr);
+    pthread_attr_setschedpolicy(&attr, SCHED_FIFO);
+    param.sched_priority = sched_get_priority_max(SCHED_FIFO);
+    pthread_attr_setschedparam(&attr, &param);
+    pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
+
+    for (int i = 0; i < nb_measurements; i++) {
+
+        mustime_t timestamp1 = sys_timestamp (); 
+
+        pthread_create(&posix_t, &attr, dummy_thread, NULL);
+        pthread_join(posix_t, NULL);
+
+        mustime_t timestamp2 = sys_timestamp (); 
+
+        deltas[i++] = timestamp2 - timestamp1;
+    }
+
+    pthread_attr_destroy(&attr);
+
+    return musec_e;
+}
diff --git a/todo/instantiation_thread.c b/todo/instantiation_thread.c
deleted file mode 100644
index e72fe22..0000000
--- a/todo/instantiation_thread.c
+++ /dev/null
@@ -1,75 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <time.h>
-#include <math.h>
-
-#define NUM_MEASUREMENTS 10000
-
-double deltas_us[NUM_MEASUREMENTS];
-
-void* dummy_thread(void *arg) {
-    (void)arg;
-    return NULL;
-}
-
-double timespec_diff_us(struct timespec *start, struct timespec *end) {
-    return (end->tv_sec - start->tv_sec) * 1e6 +
-           (end->tv_nsec - start->tv_nsec) / 1e3;
-}
-
-int main(void) {
-    pthread_t posix_t;
-    pthread_attr_t attr;
-    struct sched_param param;
-
-    pthread_attr_init(&attr);
-    pthread_attr_setschedpolicy(&attr, SCHED_FIFO);
-    param.sched_priority = sched_get_priority_max(SCHED_FIFO);
-    pthread_attr_setschedparam(&attr, &param);
-    pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
-
-    struct timespec t_start, t_end;
-    int count = 0;
-
-    while (count < NUM_MEASUREMENTS) {
-        clock_gettime(CLOCK_MONOTONIC, &t_start);
-
-        pthread_create(&posix_t, &attr, dummy_thread, NULL);
-        pthread_join(posix_t, NULL);
-
-        clock_gettime(CLOCK_MONOTONIC, &t_end);
-
-        deltas_us[count] = timespec_diff_us(&t_start, &t_end);
-        count++;
-    }
-
-    pthread_attr_destroy(&attr);
-
-    // Calcul des statistiques
-    double sum = 0.0, min = deltas_us[0], max = deltas_us[0];
-    for (int i = 0; i < NUM_MEASUREMENTS; i++) {
-        double d = deltas_us[i];
-        sum += d;
-        if (d < min) min = d;
-        if (d > max) max = d;
-    }
-
-    double avg = sum / NUM_MEASUREMENTS;
-
-    double stddev_sum = 0.0;
-    for (int i = 0; i < NUM_MEASUREMENTS; i++) {
-        stddev_sum += (deltas_us[i] - avg) * (deltas_us[i] - avg);
-    }
-    double stddev = sqrt(stddev_sum / NUM_MEASUREMENTS);
-
-    printf("\n==== Timing Statistics (%d measurements) ====\n", NUM_MEASUREMENTS);
-    printf("Moyenne    : %.3f µs\n", avg);
-    printf("Minimum    : %.3f µs\n", min);
-    printf("Maximum    : %.3f µs\n", max);
-    printf("Ecart-type : %.3f µs\n", stddev);
-    printf("============================================\n");
-
-    return 0;
-}