X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=test%2Ftest%2Ftest_cycles.c;fp=test%2Ftest%2Ftest_cycles.c;h=f1897979d22fe7d91e07c23ba718b8e9a488bf62;hb=7595afa4d30097c1177b69257118d8ad89a539be;hp=0000000000000000000000000000000000000000;hpb=ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6;p=deb_dpdk.git

diff --git a/test/test/test_cycles.c b/test/test/test_cycles.c
new file mode 100644
index 00000000..f1897979
--- /dev/null
+++ b/test/test/test_cycles.c
@@ -0,0 +1,137 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#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
+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;
+	}
+
+	/* 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;
+}
+
+REGISTER_TEST_COMMAND(cycles_autotest, test_cycles);
+
+/*
+ * 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);