1 files changed, 131 insertions, 0 deletions
diff --git a/src/spdk/dpdk/app/test/test_cycles.c b/src/spdk/dpdk/app/test/test_cycles.c
new file mode 100644
index 000000000..c78e6a5b1
--- /dev/null
+++ b/src/spdk/dpdk/app/test/test_cycles.c
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include <rte_common.h>
+#include <rte_cycles.h>
+
+#include "test.h"
+
+#define N 10000
+
+/*
+ * Cycles test
+ * ===========
+ *
+ * - Loop N times and check that the timer always increments and
+ *   never decrements during this loop.
+ *
+ * - Wait one second using rte_usleep() and check that the increment
+ *   of cycles is correct with regard to the frequency of the timer.
+ */
+
+static int
+check_wait_one_second(void)
+{
+	uint64_t cycles, prev_cycles;
+	uint64_t hz = rte_get_timer_hz();
+	uint64_t max_inc = (hz / 100); /* 10 ms max between 2 reads */
+
+	/* check that waiting 1 second is precise */
+	prev_cycles = rte_get_timer_cycles();
+	rte_delay_us(1000000);
+	cycles = rte_get_timer_cycles();
+
+	if ((uint64_t)(cycles - prev_cycles) > (hz + max_inc)) {
+		printf("delay_us is not accurate: too long\n");
+		return -1;
+	}
+	if ((uint64_t)(cycles - prev_cycles) < (hz - max_inc)) {
+		printf("delay_us is not accurate: too short\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+test_cycles(void)
+{
+	unsigned i;
+	uint64_t start_cycles, cycles, prev_cycles;
+	uint64_t hz = rte_get_timer_hz();
+	uint64_t max_inc = (hz / 100); /* 10 ms max between 2 reads */
+
+	/* check that the timer is always incrementing */
+	start_cycles = rte_get_timer_cycles();
+	prev_cycles = start_cycles;
+	for (i=0; i<N; i++) {
+		cycles = rte_get_timer_cycles();
+		if ((uint64_t)(cycles - prev_cycles) > max_inc) {
+			printf("increment too high or going backwards\n");
+			return -1;
+		}
+		prev_cycles = cycles;
+	}
+
+	return check_wait_one_second();
+}
+
+REGISTER_TEST_COMMAND(cycles_autotest, test_cycles);
+
+/*
+ * One second precision test with rte_delay_us_sleep.
+ */
+
+static int
+test_delay_us_sleep(void)
+{
+	rte_delay_us_callback_register(rte_delay_us_sleep);
+	return check_wait_one_second();
+}
+
+REGISTER_TEST_COMMAND(delay_us_sleep_autotest, test_delay_us_sleep);
+
+/*
+ * rte_delay_us_callback test
+ *
+ * - check if callback is correctly registered/unregistered
+ *
+ */
+
+static unsigned int pattern;
+static void my_rte_delay_us(unsigned int us)
+{
+	pattern += us;
+}
+
+static int
+test_user_delay_us(void)
+{
+	pattern = 0;
+
+	rte_delay_us(2);
+	if (pattern != 0)
+		return -1;
+
+	/* register custom delay function */
+	rte_delay_us_callback_register(my_rte_delay_us);
+
+	rte_delay_us(2);
+	if (pattern != 2)
+		return -1;
+
+	rte_delay_us(3);
+	if (pattern != 5)
+		return -1;
+
+	/* restore original delay function */
+	rte_delay_us_callback_register(rte_delay_us_block);
+
+	rte_delay_us(3);
+	if (pattern != 5)
+		return -1;
+
+	return 0;
+}
+
+REGISTER_TEST_COMMAND(user_delay_us, test_user_delay_us);