Function test_single_enqueue_dequeue

dpdk/app/test/test_ring_perf.c:427–454

* Test function that determines how long an enqueue + dequeue of a single item * takes on a single lcore. Result is for comparison with the bulk enq+deq. */

 * takes on a single lcore. Result is for comparison with the bulk enq+deq.
 */
static int
test_single_enqueue_dequeue(struct rte_ring *r, const int esize,
	const unsigned int api_type)
{
	const unsigned int iter_shift = 24;
	const unsigned int iterations = 1 << iter_shift;
	unsigned int i = 0;
	void *burst = NULL;

	/* alloc dummy object pointers */
	burst = test_ring_calloc(1, esize);
	if (burst == NULL)
		return -1;

	const uint64_t start = rte_rdtsc();
	for (i = 0; i < iterations; i++) {
		test_ring_enqueue(r, burst, esize, 1, api_type);
		test_ring_dequeue(r, burst, esize, 1, api_type);
	}
	const uint64_t end = rte_rdtsc();

	test_ring_print_test_string(api_type, esize, 1,
					((double)(end - start)) / iterations);

	rte_free(burst);

	return 0;
}

/*
 * Test that does both enqueue and dequeue on a core using the burst/bulk API