--- /dev/null
+/*-
+ * 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 "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>
+
+#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_LINUXAPP
+#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);
+
+ return 0;
+}
+
+static struct test_command timer_perf_cmd = {
+ .command = "timer_perf_autotest",
+ .callback = test_timer_perf,
+};
+REGISTER_TEST_COMMAND(timer_perf_cmd);
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