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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2012 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.
+ *
+ * version: DPDK.L.1.2.3-3
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <sys/queue.h>
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_cycles.h>
+#include <rte_timer.h>
+#include <rte_debug.h>
+
+#include "main.h"
+
+#define TIMER_RESOLUTION_CYCLES 20000000ULL /* around 10ms at 2 Ghz */
+
+static struct rte_timer timer0;
+static struct rte_timer timer1;
+
+/* timer0 callback */
+static void
+timer0_cb(__attribute__((unused)) struct rte_timer *tim,
+ __attribute__((unused)) void *arg)
+{
+ static unsigned counter = 0;
+ unsigned lcore_id = rte_lcore_id();
+
+ printf("%s() on lcore %u\n", __func__, lcore_id);
+
+ /* this timer is automatically reloaded until we decide to
+ * stop it, when counter reaches 20. */
+ if ((counter ++) == 20)
+ rte_timer_stop(tim);
+}
+
+/* timer1 callback */
+static void
+timer1_cb(__attribute__((unused)) struct rte_timer *tim,
+ __attribute__((unused)) void *arg)
+{
+ unsigned lcore_id = rte_lcore_id();
+ uint64_t hz;
+
+ printf("%s() on lcore %u\n", __func__, lcore_id);
+
+ /* reload it on another lcore */
+ hz = rte_get_hpet_hz();
+ lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
+ rte_timer_reset(tim, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
+}
+
+static __attribute__((noreturn)) int
+lcore_mainloop(__attribute__((unused)) void *arg)
+{
+ uint64_t prev_tsc = 0, cur_tsc, diff_tsc;
+ unsigned lcore_id;
+
+ lcore_id = rte_lcore_id();
+ printf("Starting mainloop on core %u\n", lcore_id);
+
+ while (1) {
+ /*
+ * Call the timer handler on each core: as we don't
+ * need a very precise timer, so only call
+ * rte_timer_manage() every ~10ms (at 2Ghz). In a real
+ * application, this will enhance performances as
+ * reading the HPET timer is not efficient.
+ */
+ cur_tsc = rte_rdtsc();
+ diff_tsc = cur_tsc - prev_tsc;
+ if (diff_tsc > TIMER_RESOLUTION_CYCLES) {
+ rte_timer_manage();
+ prev_tsc = cur_tsc;
+ }
+ }
+}
+
+int
+MAIN(int argc, char **argv)
+{
+ int ret;
+ uint64_t hz;
+ unsigned lcore_id;
+
+ /* init EAL */
+ ret = rte_eal_init(argc, argv);
+ if (ret < 0)
+ rte_panic("Cannot init EAL\n");
+
+ /* init RTE timer library */
+ rte_timer_subsystem_init();
+
+ /* init timer structures */
+ rte_timer_init(&timer0);
+ rte_timer_init(&timer1);
+
+ /* load timer0, every second, on master lcore, reloaded automatically */
+ hz = rte_get_hpet_hz();
+ lcore_id = rte_lcore_id();
+ rte_timer_reset(&timer0, hz, PERIODICAL, lcore_id, timer0_cb, NULL);
+
+ /* load timer1, every second/3, on next lcore, reloaded manually */
+ lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
+ rte_timer_reset(&timer1, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
+
+ /* call lcore_mainloop() on every slave lcore */
+ RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+ rte_eal_remote_launch(lcore_mainloop, NULL, lcore_id);
+ }
+
+ /* call it on master lcore too */
+ (void) lcore_mainloop(NULL);
+
+ return 0;
+}