rework build system #1

each benchmark has its own Makefile which must put it's binaries into
OBJDIR which is added to the PATH during execution.

1 files changed, 87 insertions, 0 deletions

diff --git a/src/benchmarks/loop/loop.c b/src/benchmarks/loop/loop.c
new file mode 100644
index 0000000..bc15808
--- /dev/null
+++ b/src/benchmarks/loop/loop.c
@@ -0,0 +1,87 @@
+#include <assert.h>
+#include <malloc.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+static size_t _rand() {
+	static __thread size_t seed = 123456789;
+	size_t a = 1103515245;
+	size_t c = 12345;
+	size_t m = 1 << 31;
+	seed = (a * seed + c) % m;
+		return seed;
+}
+
+typedef struct ThreadArgs {
+	double benchmark;
+	int allocations;
+	int max_size;
+} ThreadArgs;
+
+static void* malloc_then_write(size_t size) {
+	void* ptr = malloc(size);
+	// Write to ptr
+	/* *((char*)ptr) = '!'; */
+	return ptr;
+}
+
+static void read_then_free(void* ptr) {
+	// Read before free
+	/* char s __attribute__((unused)) = *((char*)ptr); */
+	free(ptr);
+}
+static void* test_thread_func(void* arg) {
+	ThreadArgs* args = (ThreadArgs*)arg;
+
+	for(int i = 0; i < args->allocations; i++) {
+		void* ptr = malloc_then_write((_rand() % args->max_size) + 1);
+		read_then_free(ptr);
+	}
+	return NULL;
+}
+
+int main(int argc, char* argv[]) {
+	pthread_t* threads;
+	int num_threads;
+	struct ThreadArgs thread_args;
+
+	if (argc < 4) {
+		fprintf(stderr, "Usage: %s <num threads> <num allocations> <max size>\n", argv[0]);
+		return 1;
+	}
+
+	num_threads = atoi(argv[1]);
+	thread_args.allocations = atoi(argv[2]);
+	thread_args.max_size = atoi(argv[3]);
+
+	threads = (pthread_t*)malloc(num_threads * sizeof(pthread_t));
+
+	for (int i = 0; i < num_threads; i++) {
+		if (0 != pthread_create(&threads[i], NULL, test_thread_func, &thread_args)) {
+			perror("pthread_create");
+			return 1;
+		}
+	}
+
+	for(int i = 0; i < num_threads; i++) {
+		if (0 != pthread_join(threads[i], NULL)) {
+			perror("pthread_join");
+			return 1;
+		}
+	}
+
+	if (argc == 5)
+	{
+		FILE* f = stdout;
+		if (strcmp(argv[4],"stdout") != 0)
+			f = fopen(argv[4], "w");
+		malloc_info(0, f);
+		if (strcmp(argv[4],"stdout") != 0)
+			fclose(f);
+	}
+
+	return 0;
+}