1 files changed, 142 insertions, 0 deletions
diff --git a/regressions/ck_ring/benchmark/latency.c b/regressions/ck_ring/benchmark/latency.c
new file mode 100644
index 0000000..657be4d
--- /dev/null
+++ b/regressions/ck_ring/benchmark/latency.c
@@ -0,0 +1,142 @@
+#include <ck_ring.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../../common.h"
+
+#ifndef ITERATIONS
+#define ITERATIONS (128000)
+#endif
+
+struct entry {
+	int tid;
+	int value;
+};
+
+int
+main(int argc, char *argv[])
+{
+	int i, r, size;
+	uint64_t s, e, e_a, d_a;
+	struct entry entry = {0, 0};
+	ck_ring_buffer_t *buf;
+	ck_ring_t ring;
+
+	if (argc != 2) {
+		ck_error("Usage: latency <size>\n");
+	}
+
+	size = atoi(argv[1]);
+	if (size <= 4 || (size & (size - 1))) {
+		ck_error("ERROR: Size must be a power of 2 greater than 4.\n");
+	}
+
+	buf = malloc(sizeof(ck_ring_buffer_t) * size);
+	if (buf == NULL) {
+		ck_error("ERROR: Failed to allocate buffer\n");
+	}
+
+	ck_ring_init(&ring, size);
+
+	e_a = d_a = s = e = 0;
+	for (r = 0; r < ITERATIONS; r++) {
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_enqueue_spsc(&ring, buf, &entry);
+			ck_ring_enqueue_spsc(&ring, buf, &entry);
+			ck_ring_enqueue_spsc(&ring, buf, &entry);
+			ck_ring_enqueue_spsc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		e_a += (e - s) / 4;
+
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_dequeue_spsc(&ring, buf, &entry);
+			ck_ring_dequeue_spsc(&ring, buf, &entry);
+			ck_ring_dequeue_spsc(&ring, buf, &entry);
+			ck_ring_dequeue_spsc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		d_a += (e - s) / 4;
+	}
+
+	printf("spsc %10d %16" PRIu64 " %16" PRIu64 "\n", size, e_a / ITERATIONS, d_a / ITERATIONS);
+
+	e_a = d_a = s = e = 0;
+	for (r = 0; r < ITERATIONS; r++) {
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_enqueue_spmc(&ring, buf, &entry);
+			ck_ring_enqueue_spmc(&ring, buf, &entry);
+			ck_ring_enqueue_spmc(&ring, buf, &entry);
+			ck_ring_enqueue_spmc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		e_a += (e - s) / 4;
+
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_dequeue_spmc(&ring, buf, &entry);
+			ck_ring_dequeue_spmc(&ring, buf, &entry);
+			ck_ring_dequeue_spmc(&ring, buf, &entry);
+			ck_ring_dequeue_spmc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		d_a += (e - s) / 4;
+	}
+
+	printf("spmc %10d %16" PRIu64 " %16" PRIu64 "\n", size, e_a / ITERATIONS, d_a / ITERATIONS);
+
+	ck_ring_init(&ring, size);
+	e_a = d_a = s = e = 0;
+	for (r = 0; r < ITERATIONS; r++) {
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_enqueue_mpsc(&ring, buf, &entry);
+			ck_ring_enqueue_mpsc(&ring, buf, &entry);
+			ck_ring_enqueue_mpsc(&ring, buf, &entry);
+			ck_ring_enqueue_mpsc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		e_a += (e - s) / 4;
+
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_dequeue_mpsc(&ring, buf, &entry);
+			ck_ring_dequeue_mpsc(&ring, buf, &entry);
+			ck_ring_dequeue_mpsc(&ring, buf, &entry);
+			ck_ring_dequeue_mpsc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		d_a += (e - s) / 4;
+	}
+	printf("mpsc %10d %16" PRIu64 " %16" PRIu64 "\n", size, e_a / ITERATIONS, d_a / ITERATIONS);
+	ck_ring_init(&ring, size);
+	e_a = d_a = s = e = 0;
+	for (r = 0; r < ITERATIONS; r++) {
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_enqueue_mpmc(&ring, buf, &entry);
+			ck_ring_enqueue_mpmc(&ring, buf, &entry);
+			ck_ring_enqueue_mpmc(&ring, buf, &entry);
+			ck_ring_enqueue_mpmc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		e_a += (e - s) / 4;
+
+		for (i = 0; i < size / 4; i += 4) {
+			s = rdtsc();
+			ck_ring_dequeue_mpmc(&ring, buf, &entry);
+			ck_ring_dequeue_mpmc(&ring, buf, &entry);
+			ck_ring_dequeue_mpmc(&ring, buf, &entry);
+			ck_ring_dequeue_mpmc(&ring, buf, &entry);
+			e = rdtsc();
+		}
+		d_a += (e - s) / 4;
+	}
+	printf("mpmc %10d %16" PRIu64 " %16" PRIu64 "\n", size, e_a / ITERATIONS, d_a / ITERATIONS);
+	return (0);
+}