--- /dev/null
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2018 Arm Limited
+ */
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <rte_pause.h>
+#include <rte_rcu_qsbr.h>
+#include <rte_hash.h>
+#include <rte_hash_crc.h>
+#include <rte_malloc.h>
+#include <rte_cycles.h>
+#include <unistd.h>
+
+#include "test.h"
+
+/* Check condition and return an error if true. */
+#define TEST_RCU_QSBR_RETURN_IF_ERROR(cond, str, ...) do { \
+ if (cond) { \
+ printf("ERROR file %s, line %d: " str "\n", __FILE__, \
+ __LINE__, ##__VA_ARGS__); \
+ return -1; \
+ } \
+} while (0)
+
+/* Make sure that this has the same value as __RTE_QSBR_CNT_INIT */
+#define TEST_RCU_QSBR_CNT_INIT 1
+
+#define TEST_RCU_MAX_LCORE 128
+uint16_t enabled_core_ids[TEST_RCU_MAX_LCORE];
+uint8_t num_cores;
+
+static uint32_t *keys;
+#define TOTAL_ENTRY (1024 * 8)
+#define COUNTER_VALUE 4096
+static uint32_t *hash_data[TEST_RCU_MAX_LCORE][TOTAL_ENTRY];
+static uint8_t writer_done;
+
+static struct rte_rcu_qsbr *t[TEST_RCU_MAX_LCORE];
+struct rte_hash *h[TEST_RCU_MAX_LCORE];
+char hash_name[TEST_RCU_MAX_LCORE][8];
+
+static inline int
+get_enabled_cores_mask(void)
+{
+ uint16_t core_id;
+ uint32_t max_cores = rte_lcore_count();
+
+ if (max_cores > TEST_RCU_MAX_LCORE) {
+ printf("Number of cores exceed %d\n", TEST_RCU_MAX_LCORE);
+ return -1;
+ }
+
+ core_id = 0;
+ num_cores = 0;
+ RTE_LCORE_FOREACH_SLAVE(core_id) {
+ enabled_core_ids[num_cores] = core_id;
+ num_cores++;
+ }
+
+ return 0;
+}
+
+static int
+alloc_rcu(void)
+{
+ int i;
+ uint32_t sz;
+
+ sz = rte_rcu_qsbr_get_memsize(TEST_RCU_MAX_LCORE);
+
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ t[i] = (struct rte_rcu_qsbr *)rte_zmalloc(NULL, sz,
+ RTE_CACHE_LINE_SIZE);
+
+ return 0;
+}
+
+static int
+free_rcu(void)
+{
+ int i;
+
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_free(t[i]);
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_thread_register: Add a reader thread, to the list of threads
+ * reporting their quiescent state on a QS variable.
+ */
+static int
+test_rcu_qsbr_get_memsize(void)
+{
+ uint32_t sz;
+
+ printf("\nTest rte_rcu_qsbr_thread_register()\n");
+
+ sz = rte_rcu_qsbr_get_memsize(0);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((sz != 1), "Get Memsize for 0 threads");
+
+ sz = rte_rcu_qsbr_get_memsize(TEST_RCU_MAX_LCORE);
+ /* For 128 threads,
+ * for machines with cache line size of 64B - 8384
+ * for machines with cache line size of 128 - 16768
+ */
+ TEST_RCU_QSBR_RETURN_IF_ERROR((sz != 8384 && sz != 16768),
+ "Get Memsize");
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_init: Initialize a QSBR variable.
+ */
+static int
+test_rcu_qsbr_init(void)
+{
+ int r;
+
+ printf("\nTest rte_rcu_qsbr_init()\n");
+
+ r = rte_rcu_qsbr_init(NULL, TEST_RCU_MAX_LCORE);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((r != 1), "NULL variable");
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_thread_register: Add a reader thread, to the list of threads
+ * reporting their quiescent state on a QS variable.
+ */
+static int
+test_rcu_qsbr_thread_register(void)
+{
+ int ret;
+
+ printf("\nTest rte_rcu_qsbr_thread_register()\n");
+
+ ret = rte_rcu_qsbr_thread_register(NULL, enabled_core_ids[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "NULL variable check");
+
+ ret = rte_rcu_qsbr_thread_register(NULL, 100000);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0),
+ "NULL variable, invalid thread id");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ /* Register valid thread id */
+ ret = rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 1), "Valid thread id");
+
+ /* Re-registering should not return error */
+ ret = rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 1),
+ "Already registered thread id");
+
+ /* Register valid thread id - max allowed thread id */
+ ret = rte_rcu_qsbr_thread_register(t[0], TEST_RCU_MAX_LCORE - 1);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 1), "Max thread id");
+
+ ret = rte_rcu_qsbr_thread_register(t[0], 100000);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0),
+ "NULL variable, invalid thread id");
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_thread_unregister: Remove a reader thread, from the list of
+ * threads reporting their quiescent state on a QS variable.
+ */
+static int
+test_rcu_qsbr_thread_unregister(void)
+{
+ int i, j, ret;
+ uint64_t token;
+ uint8_t num_threads[3] = {1, TEST_RCU_MAX_LCORE, 1};
+
+ printf("\nTest rte_rcu_qsbr_thread_unregister()\n");
+
+ ret = rte_rcu_qsbr_thread_unregister(NULL, enabled_core_ids[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "NULL variable check");
+
+ ret = rte_rcu_qsbr_thread_unregister(NULL, 100000);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0),
+ "NULL variable, invalid thread id");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[0]);
+
+ ret = rte_rcu_qsbr_thread_unregister(t[0], 100000);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0),
+ "NULL variable, invalid thread id");
+
+ /* Find first disabled core */
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++) {
+ if (enabled_core_ids[i] == 0)
+ break;
+ }
+ /* Test with disabled lcore */
+ ret = rte_rcu_qsbr_thread_unregister(t[0], i);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 1),
+ "disabled thread id");
+ /* Unregister already unregistered core */
+ ret = rte_rcu_qsbr_thread_unregister(t[0], i);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 1),
+ "Already unregistered core");
+
+ /* Test with enabled lcore */
+ ret = rte_rcu_qsbr_thread_unregister(t[0], enabled_core_ids[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 1),
+ "enabled thread id");
+ /* Unregister already unregistered core */
+ ret = rte_rcu_qsbr_thread_unregister(t[0], enabled_core_ids[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 1),
+ "Already unregistered core");
+
+ /*
+ * Test with different thread_ids:
+ * 1 - thread_id = 0
+ * 2 - All possible thread_ids, from 0 to TEST_RCU_MAX_LCORE
+ * 3 - thread_id = TEST_RCU_MAX_LCORE - 1
+ */
+ for (j = 0; j < 3; j++) {
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ for (i = 0; i < num_threads[j]; i++)
+ rte_rcu_qsbr_thread_register(t[0],
+ (j == 2) ? (TEST_RCU_MAX_LCORE - 1) : i);
+
+ token = rte_rcu_qsbr_start(t[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR(
+ (token != (TEST_RCU_QSBR_CNT_INIT + 1)), "QSBR Start");
+ /* Update quiescent state counter */
+ for (i = 0; i < num_threads[j]; i++) {
+ /* Skip one update */
+ if (i == (TEST_RCU_MAX_LCORE - 10))
+ continue;
+ rte_rcu_qsbr_quiescent(t[0],
+ (j == 2) ? (TEST_RCU_MAX_LCORE - 1) : i);
+ }
+
+ if (j == 1) {
+ /* Validate the updates */
+ ret = rte_rcu_qsbr_check(t[0], token, false);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0),
+ "Non-blocking QSBR check");
+ /* Update the previously skipped thread */
+ rte_rcu_qsbr_quiescent(t[0], TEST_RCU_MAX_LCORE - 10);
+ }
+
+ /* Validate the updates */
+ ret = rte_rcu_qsbr_check(t[0], token, false);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0),
+ "Non-blocking QSBR check");
+
+ for (i = 0; i < num_threads[j]; i++)
+ rte_rcu_qsbr_thread_unregister(t[0],
+ (j == 2) ? (TEST_RCU_MAX_LCORE - 1) : i);
+
+ /* Check with no thread registered */
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0),
+ "Blocking QSBR check");
+ }
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_start: Ask the worker threads to report the quiescent state
+ * status.
+ */
+static int
+test_rcu_qsbr_start(void)
+{
+ uint64_t token;
+ int i;
+
+ printf("\nTest rte_rcu_qsbr_start()\n");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ for (i = 0; i < 3; i++)
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[i]);
+
+ token = rte_rcu_qsbr_start(t[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR(
+ (token != (TEST_RCU_QSBR_CNT_INIT + 1)), "QSBR Start");
+ return 0;
+}
+
+static int
+test_rcu_qsbr_check_reader(void *arg)
+{
+ struct rte_rcu_qsbr *temp;
+ uint8_t read_type = (uint8_t)((uintptr_t)arg);
+
+ temp = t[read_type];
+
+ /* Update quiescent state counter */
+ rte_rcu_qsbr_quiescent(temp, enabled_core_ids[0]);
+ rte_rcu_qsbr_quiescent(temp, enabled_core_ids[1]);
+ rte_rcu_qsbr_thread_unregister(temp, enabled_core_ids[2]);
+ rte_rcu_qsbr_quiescent(temp, enabled_core_ids[3]);
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_check: Checks if all the worker threads have entered the queis-
+ * cent state 'n' number of times. 'n' is provided in rte_rcu_qsbr_start API.
+ */
+static int
+test_rcu_qsbr_check(void)
+{
+ int i, ret;
+ uint64_t token;
+
+ printf("\nTest rte_rcu_qsbr_check()\n");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ token = rte_rcu_qsbr_start(t[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR(
+ (token != (TEST_RCU_QSBR_CNT_INIT + 1)), "QSBR Start");
+
+
+ ret = rte_rcu_qsbr_check(t[0], 0, false);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "Token = 0");
+
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "Blocking QSBR check");
+
+ for (i = 0; i < 3; i++)
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[i]);
+
+ ret = rte_rcu_qsbr_check(t[0], token, false);
+ /* Threads are offline, hence this should pass */
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "Non-blocking QSBR check");
+
+ token = rte_rcu_qsbr_start(t[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR(
+ (token != (TEST_RCU_QSBR_CNT_INIT + 2)), "QSBR Start");
+
+ ret = rte_rcu_qsbr_check(t[0], token, false);
+ /* Threads are offline, hence this should pass */
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "Non-blocking QSBR check");
+
+ for (i = 0; i < 3; i++)
+ rte_rcu_qsbr_thread_unregister(t[0], enabled_core_ids[i]);
+
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "Blocking QSBR check");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ for (i = 0; i < 4; i++)
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[i]);
+
+ token = rte_rcu_qsbr_start(t[0]);
+ TEST_RCU_QSBR_RETURN_IF_ERROR(
+ (token != (TEST_RCU_QSBR_CNT_INIT + 1)), "QSBR Start");
+
+ rte_eal_remote_launch(test_rcu_qsbr_check_reader, NULL,
+ enabled_core_ids[0]);
+
+ rte_eal_mp_wait_lcore();
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret != 1), "Blocking QSBR check");
+
+ return 0;
+}
+
+static int
+test_rcu_qsbr_synchronize_reader(void *arg)
+{
+ uint32_t lcore_id = rte_lcore_id();
+ (void)arg;
+
+ /* Register and become online */
+ rte_rcu_qsbr_thread_register(t[0], lcore_id);
+ rte_rcu_qsbr_thread_online(t[0], lcore_id);
+
+ while (!writer_done)
+ rte_rcu_qsbr_quiescent(t[0], lcore_id);
+
+ rte_rcu_qsbr_thread_offline(t[0], lcore_id);
+ rte_rcu_qsbr_thread_unregister(t[0], lcore_id);
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_synchronize: Wait till all the reader threads have entered
+ * the queiscent state.
+ */
+static int
+test_rcu_qsbr_synchronize(void)
+{
+ int i;
+
+ printf("\nTest rte_rcu_qsbr_synchronize()\n");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ /* Test if the API returns when there are no threads reporting
+ * QS on the variable.
+ */
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+
+ /* Test if the API returns when there are threads registered
+ * but not online.
+ */
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_rcu_qsbr_thread_register(t[0], i);
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+
+ /* Test if the API returns when the caller is also
+ * reporting the QS status.
+ */
+ rte_rcu_qsbr_thread_online(t[0], 0);
+ rte_rcu_qsbr_synchronize(t[0], 0);
+ rte_rcu_qsbr_thread_offline(t[0], 0);
+
+ /* Check the other boundary */
+ rte_rcu_qsbr_thread_online(t[0], TEST_RCU_MAX_LCORE - 1);
+ rte_rcu_qsbr_synchronize(t[0], TEST_RCU_MAX_LCORE - 1);
+ rte_rcu_qsbr_thread_offline(t[0], TEST_RCU_MAX_LCORE - 1);
+
+ /* Test if the API returns after unregisterng all the threads */
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_rcu_qsbr_thread_unregister(t[0], i);
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+
+ /* Test if the API returns with the live threads */
+ writer_done = 0;
+ for (i = 0; i < num_cores; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_synchronize_reader,
+ NULL, enabled_core_ids[i]);
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+ rte_rcu_qsbr_synchronize(t[0], RTE_QSBR_THRID_INVALID);
+
+ writer_done = 1;
+ rte_eal_mp_wait_lcore();
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_thread_online: Add a registered reader thread, to
+ * the list of threads reporting their quiescent state on a QS variable.
+ */
+static int
+test_rcu_qsbr_thread_online(void)
+{
+ int i, ret;
+ uint64_t token;
+
+ printf("Test rte_rcu_qsbr_thread_online()\n");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ /* Register 2 threads to validate that only the
+ * online thread is waited upon.
+ */
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[0]);
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[1]);
+
+ /* Use qsbr_start to verify that the thread_online API
+ * succeeded.
+ */
+ token = rte_rcu_qsbr_start(t[0]);
+
+ /* Make the thread online */
+ rte_rcu_qsbr_thread_online(t[0], enabled_core_ids[0]);
+
+ /* Check if the thread is online */
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "thread online");
+
+ /* Check if the online thread, can report QS */
+ token = rte_rcu_qsbr_start(t[0]);
+ rte_rcu_qsbr_quiescent(t[0], enabled_core_ids[0]);
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "thread update");
+
+ /* Make all the threads online */
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+ token = rte_rcu_qsbr_start(t[0]);
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++) {
+ rte_rcu_qsbr_thread_register(t[0], i);
+ rte_rcu_qsbr_thread_online(t[0], i);
+ }
+ /* Check if all the threads are online */
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "thread online");
+ /* Check if all the online threads can report QS */
+ token = rte_rcu_qsbr_start(t[0]);
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_rcu_qsbr_quiescent(t[0], i);
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "thread update");
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_thread_offline: Remove a registered reader thread, from
+ * the list of threads reporting their quiescent state on a QS variable.
+ */
+static int
+test_rcu_qsbr_thread_offline(void)
+{
+ int i, ret;
+ uint64_t token;
+
+ printf("\nTest rte_rcu_qsbr_thread_offline()\n");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[0]);
+
+ /* Make the thread offline */
+ rte_rcu_qsbr_thread_offline(t[0], enabled_core_ids[0]);
+
+ /* Use qsbr_start to verify that the thread_offline API
+ * succeeded.
+ */
+ token = rte_rcu_qsbr_start(t[0]);
+ /* Check if the thread is offline */
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "thread offline");
+
+ /* Bring an offline thread online and check if it can
+ * report QS.
+ */
+ rte_rcu_qsbr_thread_online(t[0], enabled_core_ids[0]);
+ /* Check if the online thread, can report QS */
+ token = rte_rcu_qsbr_start(t[0]);
+ rte_rcu_qsbr_quiescent(t[0], enabled_core_ids[0]);
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "offline to online");
+
+ /*
+ * Check a sequence of online/status/offline/status/online/status
+ */
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+ token = rte_rcu_qsbr_start(t[0]);
+ /* Make the threads online */
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++) {
+ rte_rcu_qsbr_thread_register(t[0], i);
+ rte_rcu_qsbr_thread_online(t[0], i);
+ }
+
+ /* Check if all the threads are online */
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "thread online");
+
+ /* Check if all the online threads can report QS */
+ token = rte_rcu_qsbr_start(t[0]);
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_rcu_qsbr_quiescent(t[0], i);
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "report QS");
+
+ /* Make all the threads offline */
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_rcu_qsbr_thread_offline(t[0], i);
+ /* Make sure these threads are not being waited on */
+ token = rte_rcu_qsbr_start(t[0]);
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "offline QS");
+
+ /* Make the threads online */
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_rcu_qsbr_thread_online(t[0], i);
+ /* Check if all the online threads can report QS */
+ token = rte_rcu_qsbr_start(t[0]);
+ for (i = 0; i < TEST_RCU_MAX_LCORE; i++)
+ rte_rcu_qsbr_quiescent(t[0], i);
+ ret = rte_rcu_qsbr_check(t[0], token, true);
+ TEST_RCU_QSBR_RETURN_IF_ERROR((ret == 0), "online again");
+
+ return 0;
+}
+
+/*
+ * rte_rcu_qsbr_dump: Dump status of a single QS variable to a file
+ */
+static int
+test_rcu_qsbr_dump(void)
+{
+ int i;
+
+ printf("\nTest rte_rcu_qsbr_dump()\n");
+
+ /* Negative tests */
+ rte_rcu_qsbr_dump(NULL, t[0]);
+ rte_rcu_qsbr_dump(stdout, NULL);
+ rte_rcu_qsbr_dump(NULL, NULL);
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+ rte_rcu_qsbr_init(t[1], TEST_RCU_MAX_LCORE);
+
+ /* QS variable with 0 core mask */
+ rte_rcu_qsbr_dump(stdout, t[0]);
+
+ rte_rcu_qsbr_thread_register(t[0], enabled_core_ids[0]);
+
+ for (i = 1; i < 3; i++)
+ rte_rcu_qsbr_thread_register(t[1], enabled_core_ids[i]);
+
+ rte_rcu_qsbr_dump(stdout, t[0]);
+ rte_rcu_qsbr_dump(stdout, t[1]);
+ printf("\n");
+ return 0;
+}
+
+static int
+test_rcu_qsbr_reader(void *arg)
+{
+ struct rte_rcu_qsbr *temp;
+ struct rte_hash *hash = NULL;
+ int i;
+ uint32_t lcore_id = rte_lcore_id();
+ uint8_t read_type = (uint8_t)((uintptr_t)arg);
+ uint32_t *pdata;
+
+ temp = t[read_type];
+ hash = h[read_type];
+
+ do {
+ rte_rcu_qsbr_thread_register(temp, lcore_id);
+ rte_rcu_qsbr_thread_online(temp, lcore_id);
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ rte_rcu_qsbr_lock(temp, lcore_id);
+ if (rte_hash_lookup_data(hash, keys+i,
+ (void **)&pdata) != -ENOENT) {
+ *pdata = 0;
+ while (*pdata < COUNTER_VALUE)
+ ++*pdata;
+ }
+ rte_rcu_qsbr_unlock(temp, lcore_id);
+ }
+ /* Update quiescent state counter */
+ rte_rcu_qsbr_quiescent(temp, lcore_id);
+ rte_rcu_qsbr_thread_offline(temp, lcore_id);
+ rte_rcu_qsbr_thread_unregister(temp, lcore_id);
+ } while (!writer_done);
+
+ return 0;
+}
+
+static int
+test_rcu_qsbr_writer(void *arg)
+{
+ uint64_t token;
+ int32_t pos;
+ struct rte_rcu_qsbr *temp;
+ struct rte_hash *hash = NULL;
+ uint8_t writer_type = (uint8_t)((uintptr_t)arg);
+
+ temp = t[(writer_type/2) % TEST_RCU_MAX_LCORE];
+ hash = h[(writer_type/2) % TEST_RCU_MAX_LCORE];
+
+ /* Delete element from the shared data structure */
+ pos = rte_hash_del_key(hash, keys + (writer_type % TOTAL_ENTRY));
+ if (pos < 0) {
+ printf("Delete key failed #%d\n",
+ keys[writer_type % TOTAL_ENTRY]);
+ return -1;
+ }
+ /* Start the quiescent state query process */
+ token = rte_rcu_qsbr_start(temp);
+ /* Check the quiescent state status */
+ rte_rcu_qsbr_check(temp, token, true);
+ if (*hash_data[(writer_type/2) % TEST_RCU_MAX_LCORE]
+ [writer_type % TOTAL_ENTRY] != COUNTER_VALUE &&
+ *hash_data[(writer_type/2) % TEST_RCU_MAX_LCORE]
+ [writer_type % TOTAL_ENTRY] != 0) {
+ printf("Reader did not complete #%d = %d\t", writer_type,
+ *hash_data[(writer_type/2) % TEST_RCU_MAX_LCORE]
+ [writer_type % TOTAL_ENTRY]);
+ return -1;
+ }
+
+ if (rte_hash_free_key_with_position(hash, pos) < 0) {
+ printf("Failed to free the key #%d\n",
+ keys[writer_type % TOTAL_ENTRY]);
+ return -1;
+ }
+ rte_free(hash_data[(writer_type/2) % TEST_RCU_MAX_LCORE]
+ [writer_type % TOTAL_ENTRY]);
+ hash_data[(writer_type/2) % TEST_RCU_MAX_LCORE]
+ [writer_type % TOTAL_ENTRY] = NULL;
+
+ return 0;
+}
+
+static struct rte_hash *
+init_hash(int hash_id)
+{
+ int i;
+ struct rte_hash *h = NULL;
+
+ sprintf(hash_name[hash_id], "hash%d", hash_id);
+ struct rte_hash_parameters hash_params = {
+ .entries = TOTAL_ENTRY,
+ .key_len = sizeof(uint32_t),
+ .hash_func_init_val = 0,
+ .socket_id = rte_socket_id(),
+ .hash_func = rte_hash_crc,
+ .extra_flag =
+ RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY_LF,
+ .name = hash_name[hash_id],
+ };
+
+ h = rte_hash_create(&hash_params);
+ if (h == NULL) {
+ printf("Hash create Failed\n");
+ return NULL;
+ }
+
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ hash_data[hash_id][i] = rte_zmalloc(NULL, sizeof(uint32_t), 0);
+ if (hash_data[hash_id][i] == NULL) {
+ printf("No memory\n");
+ return NULL;
+ }
+ }
+ keys = rte_malloc(NULL, sizeof(uint32_t) * TOTAL_ENTRY, 0);
+ if (keys == NULL) {
+ printf("No memory\n");
+ return NULL;
+ }
+
+ for (i = 0; i < TOTAL_ENTRY; i++)
+ keys[i] = i;
+
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ if (rte_hash_add_key_data(h, keys + i,
+ (void *)((uintptr_t)hash_data[hash_id][i]))
+ < 0) {
+ printf("Hash key add Failed #%d\n", i);
+ return NULL;
+ }
+ }
+ return h;
+}
+
+/*
+ * Functional test:
+ * Single writer, Single QS variable, simultaneous QSBR Queries
+ */
+static int
+test_rcu_qsbr_sw_sv_3qs(void)
+{
+ uint64_t token[3];
+ int i;
+ int32_t pos[3];
+
+ writer_done = 0;
+
+ printf("Test: 1 writer, 1 QSBR variable, simultaneous QSBR queries\n");
+
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ /* Shared data structure created */
+ h[0] = init_hash(0);
+ if (h[0] == NULL) {
+ printf("Hash init failed\n");
+ goto error;
+ }
+
+ /* Reader threads are launched */
+ for (i = 0; i < 4; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_reader, NULL,
+ enabled_core_ids[i]);
+
+ /* Delete element from the shared data structure */
+ pos[0] = rte_hash_del_key(h[0], keys + 0);
+ if (pos[0] < 0) {
+ printf("Delete key failed #%d\n", keys[0]);
+ goto error;
+ }
+ /* Start the quiescent state query process */
+ token[0] = rte_rcu_qsbr_start(t[0]);
+
+ /* Delete element from the shared data structure */
+ pos[1] = rte_hash_del_key(h[0], keys + 3);
+ if (pos[1] < 0) {
+ printf("Delete key failed #%d\n", keys[3]);
+ goto error;
+ }
+ /* Start the quiescent state query process */
+ token[1] = rte_rcu_qsbr_start(t[0]);
+
+ /* Delete element from the shared data structure */
+ pos[2] = rte_hash_del_key(h[0], keys + 6);
+ if (pos[2] < 0) {
+ printf("Delete key failed #%d\n", keys[6]);
+ goto error;
+ }
+ /* Start the quiescent state query process */
+ token[2] = rte_rcu_qsbr_start(t[0]);
+
+ /* Check the quiescent state status */
+ rte_rcu_qsbr_check(t[0], token[0], true);
+ if (*hash_data[0][0] != COUNTER_VALUE && *hash_data[0][0] != 0) {
+ printf("Reader did not complete #0 = %d\n", *hash_data[0][0]);
+ goto error;
+ }
+
+ if (rte_hash_free_key_with_position(h[0], pos[0]) < 0) {
+ printf("Failed to free the key #%d\n", keys[0]);
+ goto error;
+ }
+ rte_free(hash_data[0][0]);
+ hash_data[0][0] = NULL;
+
+ /* Check the quiescent state status */
+ rte_rcu_qsbr_check(t[0], token[1], true);
+ if (*hash_data[0][3] != COUNTER_VALUE && *hash_data[0][3] != 0) {
+ printf("Reader did not complete #3 = %d\n", *hash_data[0][3]);
+ goto error;
+ }
+
+ if (rte_hash_free_key_with_position(h[0], pos[1]) < 0) {
+ printf("Failed to free the key #%d\n", keys[3]);
+ goto error;
+ }
+ rte_free(hash_data[0][3]);
+ hash_data[0][3] = NULL;
+
+ /* Check the quiescent state status */
+ rte_rcu_qsbr_check(t[0], token[2], true);
+ if (*hash_data[0][6] != COUNTER_VALUE && *hash_data[0][6] != 0) {
+ printf("Reader did not complete #6 = %d\n", *hash_data[0][6]);
+ goto error;
+ }
+
+ if (rte_hash_free_key_with_position(h[0], pos[2]) < 0) {
+ printf("Failed to free the key #%d\n", keys[6]);
+ goto error;
+ }
+ rte_free(hash_data[0][6]);
+ hash_data[0][6] = NULL;
+
+ writer_done = 1;
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+ /* Check return value from threads */
+ for (i = 0; i < 4; i++)
+ if (lcore_config[enabled_core_ids[i]].ret < 0)
+ goto error;
+ rte_hash_free(h[0]);
+ rte_free(keys);
+
+ return 0;
+
+error:
+ writer_done = 1;
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+
+ rte_hash_free(h[0]);
+ rte_free(keys);
+ for (i = 0; i < TOTAL_ENTRY; i++)
+ rte_free(hash_data[0][i]);
+
+ return -1;
+}
+
+/*
+ * Multi writer, Multiple QS variable, simultaneous QSBR queries
+ */
+static int
+test_rcu_qsbr_mw_mv_mqs(void)
+{
+ int i, j;
+ uint8_t test_cores;
+
+ writer_done = 0;
+ test_cores = num_cores / 4;
+ test_cores = test_cores * 4;
+
+ printf("Test: %d writers, %d QSBR variable, simultaneous QSBR queries\n"
+ , test_cores / 2, test_cores / 4);
+
+ for (i = 0; i < num_cores / 4; i++) {
+ rte_rcu_qsbr_init(t[i], TEST_RCU_MAX_LCORE);
+ h[i] = init_hash(i);
+ if (h[i] == NULL) {
+ printf("Hash init failed\n");
+ goto error;
+ }
+ }
+
+ /* Reader threads are launched */
+ for (i = 0; i < test_cores / 2; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_reader,
+ (void *)(uintptr_t)(i / 2),
+ enabled_core_ids[i]);
+
+ /* Writer threads are launched */
+ for (; i < test_cores; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_writer,
+ (void *)(uintptr_t)(i - (test_cores / 2)),
+ enabled_core_ids[i]);
+ /* Wait for writers to complete */
+ for (i = test_cores / 2; i < test_cores; i++)
+ rte_eal_wait_lcore(enabled_core_ids[i]);
+
+ writer_done = 1;
+ /* Wait for readers to complete */
+ rte_eal_mp_wait_lcore();
+
+ /* Check return value from threads */
+ for (i = 0; i < test_cores; i++)
+ if (lcore_config[enabled_core_ids[i]].ret < 0)
+ goto error;
+
+ for (i = 0; i < num_cores / 4; i++)
+ rte_hash_free(h[i]);
+
+ rte_free(keys);
+
+ return 0;
+
+error:
+ writer_done = 1;
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+
+ for (i = 0; i < num_cores / 4; i++)
+ rte_hash_free(h[i]);
+ rte_free(keys);
+ for (j = 0; j < TEST_RCU_MAX_LCORE; j++)
+ for (i = 0; i < TOTAL_ENTRY; i++)
+ rte_free(hash_data[j][i]);
+
+ return -1;
+}
+
+static int
+test_rcu_qsbr_main(void)
+{
+ if (get_enabled_cores_mask() != 0)
+ return -1;
+
+ if (num_cores < 4) {
+ printf("Test failed! Need 4 or more cores\n");
+ goto test_fail;
+ }
+
+ /* Error-checking test cases */
+ if (test_rcu_qsbr_get_memsize() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_init() < 0)
+ goto test_fail;
+
+ alloc_rcu();
+
+ if (test_rcu_qsbr_thread_register() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_thread_unregister() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_start() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_check() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_synchronize() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_dump() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_thread_online() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_thread_offline() < 0)
+ goto test_fail;
+
+ printf("\nFunctional tests\n");
+
+ if (test_rcu_qsbr_sw_sv_3qs() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_mw_mv_mqs() < 0)
+ goto test_fail;
+
+ free_rcu();
+
+ printf("\n");
+ return 0;
+
+test_fail:
+ free_rcu();
+
+ return -1;
+}
+
+REGISTER_TEST_COMMAND(rcu_qsbr_autotest, test_rcu_qsbr_main);
--- /dev/null
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2018 Arm Limited
+ */
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <inttypes.h>
+#include <rte_pause.h>
+#include <rte_rcu_qsbr.h>
+#include <rte_hash.h>
+#include <rte_hash_crc.h>
+#include <rte_malloc.h>
+#include <rte_cycles.h>
+#include <unistd.h>
+
+#include "test.h"
+
+/* Check condition and return an error if true. */
+#define TEST_RCU_MAX_LCORE 128
+static uint16_t enabled_core_ids[TEST_RCU_MAX_LCORE];
+static uint8_t num_cores;
+
+static uint32_t *keys;
+#define TOTAL_ENTRY (1024 * 8)
+#define COUNTER_VALUE 4096
+static uint32_t *hash_data[TEST_RCU_MAX_LCORE][TOTAL_ENTRY];
+static volatile uint8_t writer_done;
+static volatile uint8_t all_registered;
+static volatile uint32_t thr_id;
+
+static struct rte_rcu_qsbr *t[TEST_RCU_MAX_LCORE];
+static struct rte_hash *h[TEST_RCU_MAX_LCORE];
+static char hash_name[TEST_RCU_MAX_LCORE][8];
+static rte_atomic64_t updates, checks;
+static rte_atomic64_t update_cycles, check_cycles;
+
+/* Scale down results to 1000 operations to support lower
+ * granularity clocks.
+ */
+#define RCU_SCALE_DOWN 1000
+
+/* Simple way to allocate thread ids in 0 to TEST_RCU_MAX_LCORE space */
+static inline uint32_t
+alloc_thread_id(void)
+{
+ uint32_t tmp_thr_id;
+
+ tmp_thr_id = __atomic_fetch_add(&thr_id, 1, __ATOMIC_RELAXED);
+ if (tmp_thr_id >= TEST_RCU_MAX_LCORE)
+ printf("Invalid thread id %u\n", tmp_thr_id);
+
+ return tmp_thr_id;
+}
+
+static inline int
+get_enabled_cores_mask(void)
+{
+ uint16_t core_id;
+ uint32_t max_cores = rte_lcore_count();
+
+ if (max_cores > TEST_RCU_MAX_LCORE) {
+ printf("Number of cores exceed %d\n", TEST_RCU_MAX_LCORE);
+ return -1;
+ }
+
+ core_id = 0;
+ num_cores = 0;
+ RTE_LCORE_FOREACH_SLAVE(core_id) {
+ enabled_core_ids[num_cores] = core_id;
+ num_cores++;
+ }
+
+ return 0;
+}
+
+static int
+test_rcu_qsbr_reader_perf(void *arg)
+{
+ bool writer_present = (bool)arg;
+ uint32_t thread_id = alloc_thread_id();
+ uint64_t loop_cnt = 0;
+ uint64_t begin, cycles;
+
+ /* Register for report QS */
+ rte_rcu_qsbr_thread_register(t[0], thread_id);
+ /* Make the thread online */
+ rte_rcu_qsbr_thread_online(t[0], thread_id);
+
+ begin = rte_rdtsc_precise();
+
+ if (writer_present) {
+ while (!writer_done) {
+ /* Update quiescent state counter */
+ rte_rcu_qsbr_quiescent(t[0], thread_id);
+ loop_cnt++;
+ }
+ } else {
+ while (loop_cnt < 100000000) {
+ /* Update quiescent state counter */
+ rte_rcu_qsbr_quiescent(t[0], thread_id);
+ loop_cnt++;
+ }
+ }
+
+ cycles = rte_rdtsc_precise() - begin;
+ rte_atomic64_add(&update_cycles, cycles);
+ rte_atomic64_add(&updates, loop_cnt);
+
+ /* Make the thread offline */
+ rte_rcu_qsbr_thread_offline(t[0], thread_id);
+ /* Unregister before exiting to avoid writer from waiting */
+ rte_rcu_qsbr_thread_unregister(t[0], thread_id);
+
+ return 0;
+}
+
+static int
+test_rcu_qsbr_writer_perf(void *arg)
+{
+ bool wait = (bool)arg;
+ uint64_t token = 0;
+ uint64_t loop_cnt = 0;
+ uint64_t begin, cycles;
+
+ begin = rte_rdtsc_precise();
+
+ do {
+ /* Start the quiescent state query process */
+ if (wait)
+ token = rte_rcu_qsbr_start(t[0]);
+
+ /* Check quiescent state status */
+ rte_rcu_qsbr_check(t[0], token, wait);
+ loop_cnt++;
+ } while (loop_cnt < 20000000);
+
+ cycles = rte_rdtsc_precise() - begin;
+ rte_atomic64_add(&check_cycles, cycles);
+ rte_atomic64_add(&checks, loop_cnt);
+ return 0;
+}
+
+/*
+ * Perf test: Reader/writer
+ * Single writer, Multiple Readers, Single QS var, Non-Blocking rcu_qsbr_check
+ */
+static int
+test_rcu_qsbr_perf(void)
+{
+ int i, sz;
+ int tmp_num_cores;
+
+ writer_done = 0;
+
+ rte_atomic64_clear(&updates);
+ rte_atomic64_clear(&update_cycles);
+ rte_atomic64_clear(&checks);
+ rte_atomic64_clear(&check_cycles);
+
+ printf("\nPerf Test: %d Readers/1 Writer('wait' in qsbr_check == true)\n",
+ num_cores - 1);
+
+ __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
+
+ if (all_registered == 1)
+ tmp_num_cores = num_cores - 1;
+ else
+ tmp_num_cores = TEST_RCU_MAX_LCORE;
+
+ sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
+ t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
+ RTE_CACHE_LINE_SIZE);
+ /* QS variable is initialized */
+ rte_rcu_qsbr_init(t[0], tmp_num_cores);
+
+ /* Reader threads are launched */
+ for (i = 0; i < num_cores - 1; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_reader_perf, (void *)1,
+ enabled_core_ids[i]);
+
+ /* Writer thread is launched */
+ rte_eal_remote_launch(test_rcu_qsbr_writer_perf,
+ (void *)1, enabled_core_ids[i]);
+
+ /* Wait for the writer thread */
+ rte_eal_wait_lcore(enabled_core_ids[i]);
+ writer_done = 1;
+
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+
+ printf("Total RCU updates = %"PRIi64"\n", rte_atomic64_read(&updates));
+ printf("Cycles per %d updates: %"PRIi64"\n", RCU_SCALE_DOWN,
+ rte_atomic64_read(&update_cycles) /
+ (rte_atomic64_read(&updates) / RCU_SCALE_DOWN));
+ printf("Total RCU checks = %"PRIi64"\n", rte_atomic64_read(&checks));
+ printf("Cycles per %d checks: %"PRIi64"\n", RCU_SCALE_DOWN,
+ rte_atomic64_read(&check_cycles) /
+ (rte_atomic64_read(&checks) / RCU_SCALE_DOWN));
+
+ rte_free(t[0]);
+
+ return 0;
+}
+
+/*
+ * Perf test: Readers
+ * Single writer, Multiple readers, Single QS variable
+ */
+static int
+test_rcu_qsbr_rperf(void)
+{
+ int i, sz;
+ int tmp_num_cores;
+
+ rte_atomic64_clear(&updates);
+ rte_atomic64_clear(&update_cycles);
+
+ __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
+
+ printf("\nPerf Test: %d Readers\n", num_cores);
+
+ if (all_registered == 1)
+ tmp_num_cores = num_cores;
+ else
+ tmp_num_cores = TEST_RCU_MAX_LCORE;
+
+ sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
+ t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
+ RTE_CACHE_LINE_SIZE);
+ /* QS variable is initialized */
+ rte_rcu_qsbr_init(t[0], tmp_num_cores);
+
+ /* Reader threads are launched */
+ for (i = 0; i < num_cores; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_reader_perf, NULL,
+ enabled_core_ids[i]);
+
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+
+ printf("Total RCU updates = %"PRIi64"\n", rte_atomic64_read(&updates));
+ printf("Cycles per %d updates: %"PRIi64"\n", RCU_SCALE_DOWN,
+ rte_atomic64_read(&update_cycles) /
+ (rte_atomic64_read(&updates) / RCU_SCALE_DOWN));
+
+ rte_free(t[0]);
+
+ return 0;
+}
+
+/*
+ * Perf test:
+ * Multiple writer, Single QS variable, Non-blocking rcu_qsbr_check
+ */
+static int
+test_rcu_qsbr_wperf(void)
+{
+ int i, sz;
+
+ rte_atomic64_clear(&checks);
+ rte_atomic64_clear(&check_cycles);
+
+ __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
+
+ printf("\nPerf test: %d Writers ('wait' in qsbr_check == false)\n",
+ num_cores);
+
+ /* Number of readers does not matter for QS variable in this test
+ * case as no reader will be registered.
+ */
+ sz = rte_rcu_qsbr_get_memsize(TEST_RCU_MAX_LCORE);
+ t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
+ RTE_CACHE_LINE_SIZE);
+ /* QS variable is initialized */
+ rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
+
+ /* Writer threads are launched */
+ for (i = 0; i < num_cores; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_writer_perf,
+ (void *)0, enabled_core_ids[i]);
+
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+
+ printf("Total RCU checks = %"PRIi64"\n", rte_atomic64_read(&checks));
+ printf("Cycles per %d checks: %"PRIi64"\n", RCU_SCALE_DOWN,
+ rte_atomic64_read(&check_cycles) /
+ (rte_atomic64_read(&checks) / RCU_SCALE_DOWN));
+
+ rte_free(t[0]);
+
+ return 0;
+}
+
+/*
+ * RCU test cases using rte_hash data structure.
+ */
+static int
+test_rcu_qsbr_hash_reader(void *arg)
+{
+ struct rte_rcu_qsbr *temp;
+ struct rte_hash *hash = NULL;
+ int i;
+ uint64_t loop_cnt = 0;
+ uint64_t begin, cycles;
+ uint32_t thread_id = alloc_thread_id();
+ uint8_t read_type = (uint8_t)((uintptr_t)arg);
+ uint32_t *pdata;
+
+ temp = t[read_type];
+ hash = h[read_type];
+
+ rte_rcu_qsbr_thread_register(temp, thread_id);
+
+ begin = rte_rdtsc_precise();
+
+ do {
+ rte_rcu_qsbr_thread_online(temp, thread_id);
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ rte_rcu_qsbr_lock(temp, thread_id);
+ if (rte_hash_lookup_data(hash, keys+i,
+ (void **)&pdata) != -ENOENT) {
+ *pdata = 0;
+ while (*pdata < COUNTER_VALUE)
+ ++*pdata;
+ }
+ rte_rcu_qsbr_unlock(temp, thread_id);
+ }
+ /* Update quiescent state counter */
+ rte_rcu_qsbr_quiescent(temp, thread_id);
+ rte_rcu_qsbr_thread_offline(temp, thread_id);
+ loop_cnt++;
+ } while (!writer_done);
+
+ cycles = rte_rdtsc_precise() - begin;
+ rte_atomic64_add(&update_cycles, cycles);
+ rte_atomic64_add(&updates, loop_cnt);
+
+ rte_rcu_qsbr_thread_unregister(temp, thread_id);
+
+ return 0;
+}
+
+static struct rte_hash *
+init_hash(int hash_id)
+{
+ int i;
+ struct rte_hash *h = NULL;
+
+ sprintf(hash_name[hash_id], "hash%d", hash_id);
+ struct rte_hash_parameters hash_params = {
+ .entries = TOTAL_ENTRY,
+ .key_len = sizeof(uint32_t),
+ .hash_func_init_val = 0,
+ .socket_id = rte_socket_id(),
+ .hash_func = rte_hash_crc,
+ .extra_flag =
+ RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY_LF,
+ .name = hash_name[hash_id],
+ };
+
+ h = rte_hash_create(&hash_params);
+ if (h == NULL) {
+ printf("Hash create Failed\n");
+ return NULL;
+ }
+
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ hash_data[hash_id][i] = rte_zmalloc(NULL, sizeof(uint32_t), 0);
+ if (hash_data[hash_id][i] == NULL) {
+ printf("No memory\n");
+ return NULL;
+ }
+ }
+ keys = rte_malloc(NULL, sizeof(uint32_t) * TOTAL_ENTRY, 0);
+ if (keys == NULL) {
+ printf("No memory\n");
+ return NULL;
+ }
+
+ for (i = 0; i < TOTAL_ENTRY; i++)
+ keys[i] = i;
+
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ if (rte_hash_add_key_data(h, keys + i,
+ (void *)((uintptr_t)hash_data[hash_id][i]))
+ < 0) {
+ printf("Hash key add Failed #%d\n", i);
+ return NULL;
+ }
+ }
+ return h;
+}
+
+/*
+ * Functional test:
+ * Single writer, Single QS variable Single QSBR query, Blocking rcu_qsbr_check
+ */
+static int
+test_rcu_qsbr_sw_sv_1qs(void)
+{
+ uint64_t token, begin, cycles;
+ int i, tmp_num_cores, sz;
+ int32_t pos;
+
+ writer_done = 0;
+
+ rte_atomic64_clear(&updates);
+ rte_atomic64_clear(&update_cycles);
+ rte_atomic64_clear(&checks);
+ rte_atomic64_clear(&check_cycles);
+
+ __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
+
+ printf("\nPerf test: 1 writer, %d readers, 1 QSBR variable, 1 QSBR Query, Blocking QSBR Check\n", num_cores);
+
+ if (all_registered == 1)
+ tmp_num_cores = num_cores;
+ else
+ tmp_num_cores = TEST_RCU_MAX_LCORE;
+
+ sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
+ t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
+ RTE_CACHE_LINE_SIZE);
+ /* QS variable is initialized */
+ rte_rcu_qsbr_init(t[0], tmp_num_cores);
+
+ /* Shared data structure created */
+ h[0] = init_hash(0);
+ if (h[0] == NULL) {
+ printf("Hash init failed\n");
+ goto error;
+ }
+
+ /* Reader threads are launched */
+ for (i = 0; i < num_cores; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_hash_reader, NULL,
+ enabled_core_ids[i]);
+
+ begin = rte_rdtsc_precise();
+
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ /* Delete elements from the shared data structure */
+ pos = rte_hash_del_key(h[0], keys + i);
+ if (pos < 0) {
+ printf("Delete key failed #%d\n", keys[i]);
+ goto error;
+ }
+ /* Start the quiescent state query process */
+ token = rte_rcu_qsbr_start(t[0]);
+
+ /* Check the quiescent state status */
+ rte_rcu_qsbr_check(t[0], token, true);
+ if (*hash_data[0][i] != COUNTER_VALUE &&
+ *hash_data[0][i] != 0) {
+ printf("Reader did not complete #%d = %d\n", i,
+ *hash_data[0][i]);
+ goto error;
+ }
+
+ if (rte_hash_free_key_with_position(h[0], pos) < 0) {
+ printf("Failed to free the key #%d\n", keys[i]);
+ goto error;
+ }
+ rte_free(hash_data[0][i]);
+ hash_data[0][i] = NULL;
+ }
+
+ cycles = rte_rdtsc_precise() - begin;
+ rte_atomic64_add(&check_cycles, cycles);
+ rte_atomic64_add(&checks, i);
+
+ writer_done = 1;
+
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+ /* Check return value from threads */
+ for (i = 0; i < num_cores; i++)
+ if (lcore_config[enabled_core_ids[i]].ret < 0)
+ goto error;
+ rte_hash_free(h[0]);
+ rte_free(keys);
+
+ printf("Following numbers include calls to rte_hash functions\n");
+ printf("Cycles per 1 update(online/update/offline): %"PRIi64"\n",
+ rte_atomic64_read(&update_cycles) /
+ rte_atomic64_read(&updates));
+
+ printf("Cycles per 1 check(start, check): %"PRIi64"\n\n",
+ rte_atomic64_read(&check_cycles) /
+ rte_atomic64_read(&checks));
+
+ rte_free(t[0]);
+
+ return 0;
+
+error:
+ writer_done = 1;
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+
+ rte_hash_free(h[0]);
+ rte_free(keys);
+ for (i = 0; i < TOTAL_ENTRY; i++)
+ rte_free(hash_data[0][i]);
+
+ rte_free(t[0]);
+
+ return -1;
+}
+
+/*
+ * Functional test:
+ * Single writer, Single QS variable, Single QSBR query,
+ * Non-blocking rcu_qsbr_check
+ */
+static int
+test_rcu_qsbr_sw_sv_1qs_non_blocking(void)
+{
+ uint64_t token, begin, cycles;
+ int i, ret, tmp_num_cores, sz;
+ int32_t pos;
+
+ writer_done = 0;
+
+ printf("Perf test: 1 writer, %d readers, 1 QSBR variable, 1 QSBR Query, Non-Blocking QSBR check\n", num_cores);
+
+ __atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
+
+ if (all_registered == 1)
+ tmp_num_cores = num_cores;
+ else
+ tmp_num_cores = TEST_RCU_MAX_LCORE;
+
+ sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
+ t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
+ RTE_CACHE_LINE_SIZE);
+ /* QS variable is initialized */
+ rte_rcu_qsbr_init(t[0], tmp_num_cores);
+
+ /* Shared data structure created */
+ h[0] = init_hash(0);
+ if (h[0] == NULL) {
+ printf("Hash init failed\n");
+ goto error;
+ }
+
+ /* Reader threads are launched */
+ for (i = 0; i < num_cores; i++)
+ rte_eal_remote_launch(test_rcu_qsbr_hash_reader, NULL,
+ enabled_core_ids[i]);
+
+ begin = rte_rdtsc_precise();
+
+ for (i = 0; i < TOTAL_ENTRY; i++) {
+ /* Delete elements from the shared data structure */
+ pos = rte_hash_del_key(h[0], keys + i);
+ if (pos < 0) {
+ printf("Delete key failed #%d\n", keys[i]);
+ goto error;
+ }
+ /* Start the quiescent state query process */
+ token = rte_rcu_qsbr_start(t[0]);
+
+ /* Check the quiescent state status */
+ do {
+ ret = rte_rcu_qsbr_check(t[0], token, false);
+ } while (ret == 0);
+ if (*hash_data[0][i] != COUNTER_VALUE &&
+ *hash_data[0][i] != 0) {
+ printf("Reader did not complete #%d = %d\n", i,
+ *hash_data[0][i]);
+ goto error;
+ }
+
+ if (rte_hash_free_key_with_position(h[0], pos) < 0) {
+ printf("Failed to free the key #%d\n", keys[i]);
+ goto error;
+ }
+ rte_free(hash_data[0][i]);
+ hash_data[0][i] = NULL;
+ }
+
+ cycles = rte_rdtsc_precise() - begin;
+ rte_atomic64_add(&check_cycles, cycles);
+ rte_atomic64_add(&checks, i);
+
+ writer_done = 1;
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+ /* Check return value from threads */
+ for (i = 0; i < num_cores; i++)
+ if (lcore_config[enabled_core_ids[i]].ret < 0)
+ goto error;
+ rte_hash_free(h[0]);
+ rte_free(keys);
+
+ printf("Following numbers include calls to rte_hash functions\n");
+ printf("Cycles per 1 update(online/update/offline): %"PRIi64"\n",
+ rte_atomic64_read(&update_cycles) /
+ rte_atomic64_read(&updates));
+
+ printf("Cycles per 1 check(start, check): %"PRIi64"\n\n",
+ rte_atomic64_read(&check_cycles) /
+ rte_atomic64_read(&checks));
+
+ rte_free(t[0]);
+
+ return 0;
+
+error:
+ writer_done = 1;
+ /* Wait until all readers have exited */
+ rte_eal_mp_wait_lcore();
+
+ rte_hash_free(h[0]);
+ rte_free(keys);
+ for (i = 0; i < TOTAL_ENTRY; i++)
+ rte_free(hash_data[0][i]);
+
+ rte_free(t[0]);
+
+ return -1;
+}
+
+static int
+test_rcu_qsbr_main(void)
+{
+ rte_atomic64_init(&updates);
+ rte_atomic64_init(&update_cycles);
+ rte_atomic64_init(&checks);
+ rte_atomic64_init(&check_cycles);
+
+ if (get_enabled_cores_mask() != 0)
+ return -1;
+
+ printf("Number of cores provided = %d\n", num_cores);
+ if (num_cores < 2) {
+ printf("Test failed! Need 2 or more cores\n");
+ goto test_fail;
+ }
+ if (num_cores > TEST_RCU_MAX_LCORE) {
+ printf("Test failed! %d cores supported\n", TEST_RCU_MAX_LCORE);
+ goto test_fail;
+ }
+
+ printf("Perf test with all reader threads registered\n");
+ printf("--------------------------------------------\n");
+ all_registered = 1;
+
+ if (test_rcu_qsbr_perf() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_rperf() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_wperf() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_sw_sv_1qs() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_sw_sv_1qs_non_blocking() < 0)
+ goto test_fail;
+
+ /* Make sure the actual number of cores provided is less than
+ * TEST_RCU_MAX_LCORE. This will allow for some threads not
+ * to be registered on the QS variable.
+ */
+ if (num_cores >= TEST_RCU_MAX_LCORE) {
+ printf("Test failed! number of cores provided should be less than %d\n",
+ TEST_RCU_MAX_LCORE);
+ goto test_fail;
+ }
+
+ printf("Perf test with some of reader threads registered\n");
+ printf("------------------------------------------------\n");
+ all_registered = 0;
+
+ if (test_rcu_qsbr_perf() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_rperf() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_wperf() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_sw_sv_1qs() < 0)
+ goto test_fail;
+
+ if (test_rcu_qsbr_sw_sv_1qs_non_blocking() < 0)
+ goto test_fail;
+
+ printf("\n");
+
+ return 0;
+
+test_fail:
+ return -1;
+}
+
+REGISTER_TEST_COMMAND(rcu_qsbr_perf_autotest, test_rcu_qsbr_main);
git.droids-corp.org / dpdk.git / commitdiff