1 files changed, 134 insertions, 0 deletions
diff --git a/src/spdk/dpdk/app/test/test_timer_perf.c b/src/spdk/dpdk/app/test/test_timer_perf.c
new file mode 100644
index 000000000..0ede4b3e4
--- /dev/null
+++ b/src/spdk/dpdk/app/test/test_timer_perf.c
@@ -0,0 +1,134 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
+ */
+
+#include "test.h"
+
+#include <stdio.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <rte_cycles.h>
+#include <rte_timer.h>
+#include <rte_common.h>
+#include <rte_lcore.h>
+#include <rte_random.h>
+#include <rte_malloc.h>
+#include <rte_pause.h>
+
+#define MAX_ITERATIONS 1000000
+
+int outstanding_count = 0;
+
+static void
+timer_cb(struct rte_timer *t __rte_unused, void *param __rte_unused)
+{
+	outstanding_count--;
+}
+
+#define DELAY_SECONDS 1
+
+#ifdef RTE_EXEC_ENV_LINUX
+#define do_delay() usleep(10)
+#else
+#define do_delay() rte_pause()
+#endif
+
+static int
+test_timer_perf(void)
+{
+	unsigned iterations = 100;
+	unsigned i;
+	struct rte_timer *tms;
+	uint64_t start_tsc, end_tsc, delay_start;
+	unsigned lcore_id = rte_lcore_id();
+
+	tms = rte_malloc(NULL, sizeof(*tms) * MAX_ITERATIONS, 0);
+
+	for (i = 0; i < MAX_ITERATIONS; i++)
+		rte_timer_init(&tms[i]);
+
+	const uint64_t ticks = rte_get_timer_hz() * DELAY_SECONDS;
+	const uint64_t ticks_per_ms = rte_get_tsc_hz()/1000;
+	const uint64_t ticks_per_us = ticks_per_ms/1000;
+
+	while (iterations <= MAX_ITERATIONS) {
+
+		printf("Appending %u timers\n", iterations);
+		start_tsc = rte_rdtsc();
+		for (i = 0; i < iterations; i++)
+			rte_timer_reset(&tms[i], ticks, SINGLE, lcore_id,
+					timer_cb, NULL);
+		end_tsc = rte_rdtsc();
+		printf("Time for %u timers: %"PRIu64" (%"PRIu64"ms), ", iterations,
+				end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
+		printf("Time per timer: %"PRIu64" (%"PRIu64"us)\n",
+				(end_tsc-start_tsc)/iterations,
+				((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
+		outstanding_count = iterations;
+		delay_start = rte_get_timer_cycles();
+		while (rte_get_timer_cycles() < delay_start + ticks)
+			do_delay();
+
+		start_tsc = rte_rdtsc();
+		while (outstanding_count)
+			rte_timer_manage();
+		end_tsc = rte_rdtsc();
+		printf("Time for %u callbacks: %"PRIu64" (%"PRIu64"ms), ", iterations,
+				end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
+		printf("Time per callback: %"PRIu64" (%"PRIu64"us)\n",
+				(end_tsc-start_tsc)/iterations,
+				((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
+
+		printf("Resetting %u timers\n", iterations);
+		start_tsc = rte_rdtsc();
+		for (i = 0; i < iterations; i++)
+			rte_timer_reset(&tms[i], rte_rand() % ticks, SINGLE, lcore_id,
+					timer_cb, NULL);
+		end_tsc = rte_rdtsc();
+		printf("Time for %u timers: %"PRIu64" (%"PRIu64"ms), ", iterations,
+				end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
+		printf("Time per timer: %"PRIu64" (%"PRIu64"us)\n",
+				(end_tsc-start_tsc)/iterations,
+				((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
+		outstanding_count = iterations;
+
+		delay_start = rte_get_timer_cycles();
+		while (rte_get_timer_cycles() < delay_start + ticks)
+			do_delay();
+
+		rte_timer_manage();
+		if (outstanding_count != 0) {
+			printf("Error: outstanding callback count = %d\n", outstanding_count);
+			return -1;
+		}
+
+		iterations *= 10;
+		printf("\n");
+	}
+
+	printf("All timers processed ok\n");
+
+	/* measure time to poll an empty timer list */
+	start_tsc = rte_rdtsc();
+	for (i = 0; i < iterations; i++)
+		rte_timer_manage();
+	end_tsc = rte_rdtsc();
+	printf("\nTime per rte_timer_manage with zero timers: %"PRIu64" cycles\n",
+			(end_tsc - start_tsc + iterations/2) / iterations);
+
+	/* measure time to poll a timer list with timers, but without
+	 * calling any callbacks */
+	rte_timer_reset(&tms[0], ticks * 100, SINGLE, lcore_id,
+			timer_cb, NULL);
+	start_tsc = rte_rdtsc();
+	for (i = 0; i < iterations; i++)
+		rte_timer_manage();
+	end_tsc = rte_rdtsc();
+	printf("Time per rte_timer_manage with zero callbacks: %"PRIu64" cycles\n",
+			(end_tsc - start_tsc + iterations/2) / iterations);
+
+	rte_free(tms);
+	return 0;
+}
+
+REGISTER_TEST_COMMAND(timer_perf_autotest, test_timer_perf);