Function bulk_push_pop

dpdk/app/test/test_stack_perf.c:134–161

Measure the average per-pointer cycle cost of stack push and pop */

/* Measure the average per-pointer cycle cost of stack push and pop */
static int
bulk_push_pop(void *p)
{
	unsigned int iterations = 1000000;
	struct thread_args *args = p;
	void *objs[MAX_BURST] = {0};
	unsigned int size, i;
	struct rte_stack *s;

	s = args->s;
	size = args->sz;

	__atomic_fetch_sub(&lcore_barrier, 1, __ATOMIC_RELAXED);
	rte_wait_until_equal_32(&lcore_barrier, 0, __ATOMIC_RELAXED);

	uint64_t start = rte_rdtsc();

	for (i = 0; i < iterations; i++) {
		rte_stack_push(s, objs, size);
		rte_stack_pop(s, objs, size);
	}

	uint64_t end = rte_rdtsc();

	args->avg = ((double)(end - start))/(iterations * size);

	return 0;
}

/*
 * Run bulk_push_pop() simultaneously on pairs of cores, to measure stack