failed sched_getaffinity_threads attempt

Better eigen naming.

kernel_module/user/sched_getaffinity_threads.c

@@ -0,0 +1,51 @@
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#gdb-step-debug-multicore */
+
+#define _GNU_SOURCE
+#include <assert.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+void* main_thread_0(void *arg) {
+	int i;
+    cpu_set_t mask;
+    CPU_ZERO(&mask);
+    CPU_SET(*((int*)arg), &mask);
+    sched_setaffinity(0, sizeof(cpu_set_t), &mask);
+    i = 0;
+    while (true) {
+    	printf("0 %d\n", i);
+    	sleep(1);
+    	i++;
+    }
+    return NULL;
+}
+
+void* main_thread_1(void *arg) {
+	int i;
+    cpu_set_t mask;
+    CPU_ZERO(&mask);
+    CPU_SET(*((int*)arg), &mask);
+    sched_setaffinity(1, sizeof(cpu_set_t), &mask);
+    i = 0;
+    while (true) {
+    	printf("1 %d\n", i);
+    	sleep(1);
+    	i++;
+    }
+    return NULL;
+}
+
+int main(void) {
+    enum NUM_THREADS {NUM_THREADS = 2};
+    pthread_t threads[NUM_THREADS];
+    int thread_args[NUM_THREADS];
+	pthread_create(&threads[0], NULL, main_thread_0, (void*)&thread_args[0]);
+	pthread_create(&threads[1], NULL, main_thread_1, (void*)&thread_args[1]);
+    pthread_join(threads[0], NULL);
+    pthread_join(threads[1], NULL);
+    return EXIT_SUCCESS;
+}