--- /dev/null
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018-2019 Arm Limited
+ */
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <unistd.h>
+
+#include <rte_atomic.h>
+#include <rte_common.h>
+#include <rte_cycles.h>
+#include <rte_eal.h>
+#include <rte_launch.h>
+#include <rte_lcore.h>
+#include <rte_memory.h>
+#include <rte_per_lcore.h>
+#include <rte_ticketlock.h>
+
+#include "test.h"
+
+/*
+ * Ticketlock test
+ * =============
+ *
+ * - There is a global ticketlock and a table of ticketlocks (one per lcore).
+ *
+ * - The test function takes all of these locks and launches the
+ * ``test_ticketlock_per_core()`` function on each core (except the master).
+ *
+ * - The function takes the global lock, display something, then releases
+ * the global lock.
+ * - The function takes the per-lcore lock, display something, then releases
+ * the per-core lock.
+ *
+ * - The main function unlocks the per-lcore locks sequentially and
+ * waits between each lock. This triggers the display of a message
+ * for each core, in the correct order. The autotest script checks that
+ * this order is correct.
+ *
+ * - A load test is carried out, with all cores attempting to lock a single lock
+ * multiple times
+ */
+
+static rte_ticketlock_t tl, tl_try;
+static rte_ticketlock_t tl_tab[RTE_MAX_LCORE];
+static rte_ticketlock_recursive_t tlr;
+static unsigned int count;
+
+static rte_atomic32_t synchro;
+
+static int
+test_ticketlock_per_core(__attribute__((unused)) void *arg)
+{
+ rte_ticketlock_lock(&tl);
+ printf("Global lock taken on core %u\n", rte_lcore_id());
+ rte_ticketlock_unlock(&tl);
+
+ rte_ticketlock_lock(&tl_tab[rte_lcore_id()]);
+ printf("Hello from core %u !\n", rte_lcore_id());
+ rte_ticketlock_unlock(&tl_tab[rte_lcore_id()]);
+
+ return 0;
+}
+
+static int
+test_ticketlock_recursive_per_core(__attribute__((unused)) void *arg)
+{
+ unsigned int id = rte_lcore_id();
+
+ rte_ticketlock_recursive_lock(&tlr);
+ printf("Global recursive lock taken on core %u - count = %d\n",
+ id, tlr.count);
+ rte_ticketlock_recursive_lock(&tlr);
+ printf("Global recursive lock taken on core %u - count = %d\n",
+ id, tlr.count);
+ rte_ticketlock_recursive_lock(&tlr);
+ printf("Global recursive lock taken on core %u - count = %d\n",
+ id, tlr.count);
+
+ printf("Hello from within recursive locks from core %u !\n", id);
+
+ rte_ticketlock_recursive_unlock(&tlr);
+ printf("Global recursive lock released on core %u - count = %d\n",
+ id, tlr.count);
+ rte_ticketlock_recursive_unlock(&tlr);
+ printf("Global recursive lock released on core %u - count = %d\n",
+ id, tlr.count);
+ rte_ticketlock_recursive_unlock(&tlr);
+ printf("Global recursive lock released on core %u - count = %d\n",
+ id, tlr.count);
+
+ return 0;
+}
+
+static rte_ticketlock_t lk = RTE_TICKETLOCK_INITIALIZER;
+static uint64_t lcount __rte_cache_aligned;
+static uint64_t lcore_count[RTE_MAX_LCORE] __rte_cache_aligned;
+static uint64_t time_cost[RTE_MAX_LCORE];
+
+#define MAX_LOOP 10000
+
+static int
+load_loop_fn(void *func_param)
+{
+ uint64_t time_diff = 0, begin;
+ uint64_t hz = rte_get_timer_hz();
+ const int use_lock = *(int *)func_param;
+ const unsigned int lcore = rte_lcore_id();
+
+ /* wait synchro for slaves */
+ if (lcore != rte_get_master_lcore())
+ while (rte_atomic32_read(&synchro) == 0)
+ ;
+
+ begin = rte_rdtsc_precise();
+ while (lcore_count[lcore] < MAX_LOOP) {
+ if (use_lock)
+ rte_ticketlock_lock(&lk);
+ lcore_count[lcore]++;
+ lcount++;
+ if (use_lock)
+ rte_ticketlock_unlock(&lk);
+ }
+ time_diff = rte_rdtsc_precise() - begin;
+ time_cost[lcore] = time_diff * 1000000 / hz;
+ return 0;
+}
+
+static int
+test_ticketlock_perf(void)
+{
+ unsigned int i;
+ uint64_t tcount = 0;
+ uint64_t total_time = 0;
+ int lock = 0;
+ const unsigned int lcore = rte_lcore_id();
+
+ printf("\nTest with no lock on single core...\n");
+ load_loop_fn(&lock);
+ printf("Core [%u] cost time = %"PRIu64" us\n", lcore, time_cost[lcore]);
+ memset(lcore_count, 0, sizeof(lcore_count));
+ memset(time_cost, 0, sizeof(time_cost));
+
+ printf("\nTest with lock on single core...\n");
+ lock = 1;
+ load_loop_fn(&lock);
+ printf("Core [%u] cost time = %"PRIu64" us\n", lcore, time_cost[lcore]);
+ memset(lcore_count, 0, sizeof(lcore_count));
+ memset(time_cost, 0, sizeof(time_cost));
+
+ lcount = 0;
+ printf("\nTest with lock on %u cores...\n", rte_lcore_count());
+
+ /* Clear synchro and start slaves */
+ rte_atomic32_set(&synchro, 0);
+ rte_eal_mp_remote_launch(load_loop_fn, &lock, SKIP_MASTER);
+
+ /* start synchro and launch test on master */
+ rte_atomic32_set(&synchro, 1);
+ load_loop_fn(&lock);
+
+ rte_eal_mp_wait_lcore();
+
+ RTE_LCORE_FOREACH(i) {
+ printf("Core [%u] cost time = %"PRIu64" us\n", i, time_cost[i]);
+ tcount += lcore_count[i];
+ total_time += time_cost[i];
+ }
+
+ if (tcount != lcount)
+ return -1;
+
+ printf("Total cost time = %"PRIu64" us\n", total_time);
+
+ return 0;
+}
+
+/*
+ * Use rte_ticketlock_trylock() to trylock a ticketlock object,
+ * If it could not lock the object successfully, it would
+ * return immediately and the variable of "count" would be
+ * increased by one per times. the value of "count" could be
+ * checked as the result later.
+ */
+static int
+test_ticketlock_try(__attribute__((unused)) void *arg)
+{
+ if (rte_ticketlock_trylock(&tl_try) == 0) {
+ rte_ticketlock_lock(&tl);
+ count++;
+ rte_ticketlock_unlock(&tl);
+ }
+
+ return 0;
+}
+
+
+/*
+ * Test rte_eal_get_lcore_state() in addition to ticketlocks
+ * as we have "waiting" then "running" lcores.
+ */
+static int
+test_ticketlock(void)
+{
+ int ret = 0;
+ int i;
+
+ /* slave cores should be waiting: print it */
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ printf("lcore %d state: %d\n", i,
+ (int) rte_eal_get_lcore_state(i));
+ }
+
+ rte_ticketlock_init(&tl);
+ rte_ticketlock_init(&tl_try);
+ rte_ticketlock_recursive_init(&tlr);
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ rte_ticketlock_init(&tl_tab[i]);
+ }
+
+ rte_ticketlock_lock(&tl);
+
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ rte_ticketlock_lock(&tl_tab[i]);
+ rte_eal_remote_launch(test_ticketlock_per_core, NULL, i);
+ }
+
+ /* slave cores should be busy: print it */
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ printf("lcore %d state: %d\n", i,
+ (int) rte_eal_get_lcore_state(i));
+ }
+ rte_ticketlock_unlock(&tl);
+
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ rte_ticketlock_unlock(&tl_tab[i]);
+ rte_delay_ms(10);
+ }
+
+ rte_eal_mp_wait_lcore();
+
+ rte_ticketlock_recursive_lock(&tlr);
+
+ /*
+ * Try to acquire a lock that we already own
+ */
+ if (!rte_ticketlock_recursive_trylock(&tlr)) {
+ printf("rte_ticketlock_recursive_trylock failed on a lock that "
+ "we already own\n");
+ ret = -1;
+ } else
+ rte_ticketlock_recursive_unlock(&tlr);
+
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ rte_eal_remote_launch(test_ticketlock_recursive_per_core,
+ NULL, i);
+ }
+ rte_ticketlock_recursive_unlock(&tlr);
+ rte_eal_mp_wait_lcore();
+
+ /*
+ * Test if it could return immediately from try-locking a locked object.
+ * Here it will lock the ticketlock object first, then launch all the
+ * slave lcores to trylock the same ticketlock object.
+ * All the slave lcores should give up try-locking a locked object and
+ * return immediately, and then increase the "count" initialized with
+ * zero by one per times.
+ * We can check if the "count" is finally equal to the number of all
+ * slave lcores to see if the behavior of try-locking a locked
+ * ticketlock object is correct.
+ */
+ if (rte_ticketlock_trylock(&tl_try) == 0)
+ return -1;
+
+ count = 0;
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ rte_eal_remote_launch(test_ticketlock_try, NULL, i);
+ }
+ rte_eal_mp_wait_lcore();
+ rte_ticketlock_unlock(&tl_try);
+ if (rte_ticketlock_is_locked(&tl)) {
+ printf("ticketlock is locked but it should not be\n");
+ return -1;
+ }
+ rte_ticketlock_lock(&tl);
+ if (count != (rte_lcore_count() - 1))
+ ret = -1;
+
+ rte_ticketlock_unlock(&tl);
+
+ /*
+ * Test if it can trylock recursively.
+ * Use rte_ticketlock_recursive_trylock() to check if it can lock
+ * a ticketlock object recursively. Here it will try to lock a
+ * ticketlock object twice.
+ */
+ if (rte_ticketlock_recursive_trylock(&tlr) == 0) {
+ printf("It failed to do the first ticketlock_recursive_trylock "
+ "but it should able to do\n");
+ return -1;
+ }
+ if (rte_ticketlock_recursive_trylock(&tlr) == 0) {
+ printf("It failed to do the second ticketlock_recursive_trylock "
+ "but it should able to do\n");
+ return -1;
+ }
+ rte_ticketlock_recursive_unlock(&tlr);
+ rte_ticketlock_recursive_unlock(&tlr);
+
+ if (test_ticketlock_perf() < 0)
+ return -1;
+
+ return ret;
+}
+
+REGISTER_TEST_COMMAND(ticketlock_autotest, test_ticketlock);
git.droids-corp.org / dpdk.git / commitdiff