tests: Move unit tests into a separate directory

The main tests directory still looks very crowded, and it's not
clear which files are part of a unit tests and which belong to
a different test subsystem. Let's clean up the mess and move the
unit tests to a separate directory.

Message-Id: <20210310063314.1049838-1-thuth@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 0 insertions, 381 deletions

diff --git a/tests/test-rcu-list.c b/tests/test-rcu-list.c
deleted file mode 100644
index 49641e1..0000000
--- a/tests/test-rcu-list.c
+++ /dev/null
@@ -1,381 +0,0 @@
-/*
- * rcuq_test.c
- *
- * usage: rcuq_test <readers> <duration>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (c) 2013 Mike D. Day, IBM Corporation.
- */
-
-#include "qemu/osdep.h"
-#include "qemu/atomic.h"
-#include "qemu/rcu.h"
-#include "qemu/thread.h"
-#include "qemu/rcu_queue.h"
-
-/*
- * Test variables.
- */
-
-static QemuMutex counts_mutex;
-static long long n_reads = 0LL;
-static long long n_updates = 0LL;
-static int64_t n_reclaims;
-static int64_t n_nodes_removed;
-static long long n_nodes = 0LL;
-static int g_test_in_charge = 0;
-
-static int nthreadsrunning;
-
-#define GOFLAG_INIT 0
-#define GOFLAG_RUN  1
-#define GOFLAG_STOP 2
-
-static int goflag = GOFLAG_INIT;
-
-#define RCU_READ_RUN 1000
-#define RCU_UPDATE_RUN 10
-#define NR_THREADS 100
-#define RCU_Q_LEN 100
-
-static QemuThread threads[NR_THREADS];
-static struct rcu_reader_data *data[NR_THREADS];
-static int n_threads;
-
-static int select_random_el(int max)
-{
-    return (rand() % max);
-}
-
-
-static void create_thread(void *(*func)(void *))
-{
-    if (n_threads >= NR_THREADS) {
-        fprintf(stderr, "Thread limit of %d exceeded!\n", NR_THREADS);
-        exit(-1);
-    }
-    qemu_thread_create(&threads[n_threads], "test", func, &data[n_threads],
-                       QEMU_THREAD_JOINABLE);
-    n_threads++;
-}
-
-static void wait_all_threads(void)
-{
-    int i;
-
-    for (i = 0; i < n_threads; i++) {
-        qemu_thread_join(&threads[i]);
-    }
-    n_threads = 0;
-}
-
-#ifndef TEST_LIST_TYPE
-#define TEST_LIST_TYPE 1
-#endif
-
-struct list_element {
-#if TEST_LIST_TYPE == 1
-    QLIST_ENTRY(list_element) entry;
-#elif TEST_LIST_TYPE == 2
-    QSIMPLEQ_ENTRY(list_element) entry;
-#elif TEST_LIST_TYPE == 3
-    QTAILQ_ENTRY(list_element) entry;
-#elif TEST_LIST_TYPE == 4
-    QSLIST_ENTRY(list_element) entry;
-#else
-#error Invalid TEST_LIST_TYPE
-#endif
-    struct rcu_head rcu;
-};
-
-static void reclaim_list_el(struct rcu_head *prcu)
-{
-    struct list_element *el = container_of(prcu, struct list_element, rcu);
-    g_free(el);
-    /* Accessed only from call_rcu thread.  */
-    qatomic_set_i64(&n_reclaims, n_reclaims + 1);
-}
-
-#if TEST_LIST_TYPE == 1
-static QLIST_HEAD(, list_element) Q_list_head;
-
-#define TEST_NAME "qlist"
-#define TEST_LIST_REMOVE_RCU        QLIST_REMOVE_RCU
-#define TEST_LIST_INSERT_AFTER_RCU  QLIST_INSERT_AFTER_RCU
-#define TEST_LIST_INSERT_HEAD_RCU   QLIST_INSERT_HEAD_RCU
-#define TEST_LIST_FOREACH_RCU       QLIST_FOREACH_RCU
-#define TEST_LIST_FOREACH_SAFE_RCU  QLIST_FOREACH_SAFE_RCU
-
-#elif TEST_LIST_TYPE == 2
-static QSIMPLEQ_HEAD(, list_element) Q_list_head =
-    QSIMPLEQ_HEAD_INITIALIZER(Q_list_head);
-
-#define TEST_NAME "qsimpleq"
-#define TEST_LIST_REMOVE_RCU(el, f)                             \
-         QSIMPLEQ_REMOVE_RCU(&Q_list_head, el, list_element, f)
-
-#define TEST_LIST_INSERT_AFTER_RCU(list_el, el, f)               \
-         QSIMPLEQ_INSERT_AFTER_RCU(&Q_list_head, list_el, el, f)
-
-#define TEST_LIST_INSERT_HEAD_RCU   QSIMPLEQ_INSERT_HEAD_RCU
-#define TEST_LIST_FOREACH_RCU       QSIMPLEQ_FOREACH_RCU
-#define TEST_LIST_FOREACH_SAFE_RCU  QSIMPLEQ_FOREACH_SAFE_RCU
-
-#elif TEST_LIST_TYPE == 3
-static QTAILQ_HEAD(, list_element) Q_list_head;
-
-#define TEST_NAME "qtailq"
-#define TEST_LIST_REMOVE_RCU(el, f) QTAILQ_REMOVE_RCU(&Q_list_head, el, f)
-
-#define TEST_LIST_INSERT_AFTER_RCU(list_el, el, f)               \
-           QTAILQ_INSERT_AFTER_RCU(&Q_list_head, list_el, el, f)
-
-#define TEST_LIST_INSERT_HEAD_RCU   QTAILQ_INSERT_HEAD_RCU
-#define TEST_LIST_FOREACH_RCU       QTAILQ_FOREACH_RCU
-#define TEST_LIST_FOREACH_SAFE_RCU  QTAILQ_FOREACH_SAFE_RCU
-
-#elif TEST_LIST_TYPE == 4
-static QSLIST_HEAD(, list_element) Q_list_head;
-
-#define TEST_NAME "qslist"
-#define TEST_LIST_REMOVE_RCU(el, f)                              \
-	 QSLIST_REMOVE_RCU(&Q_list_head, el, list_element, f)
-
-#define TEST_LIST_INSERT_AFTER_RCU(list_el, el, f)               \
-         QSLIST_INSERT_AFTER_RCU(&Q_list_head, list_el, el, f)
-
-#define TEST_LIST_INSERT_HEAD_RCU   QSLIST_INSERT_HEAD_RCU
-#define TEST_LIST_FOREACH_RCU       QSLIST_FOREACH_RCU
-#define TEST_LIST_FOREACH_SAFE_RCU  QSLIST_FOREACH_SAFE_RCU
-#else
-#error Invalid TEST_LIST_TYPE
-#endif
-
-static void *rcu_q_reader(void *arg)
-{
-    long long n_reads_local = 0;
-    struct list_element *el;
-
-    rcu_register_thread();
-
-    *(struct rcu_reader_data **)arg = &rcu_reader;
-    qatomic_inc(&nthreadsrunning);
-    while (qatomic_read(&goflag) == GOFLAG_INIT) {
-        g_usleep(1000);
-    }
-
-    while (qatomic_read(&goflag) == GOFLAG_RUN) {
-        rcu_read_lock();
-        TEST_LIST_FOREACH_RCU(el, &Q_list_head, entry) {
-            n_reads_local++;
-            if (qatomic_read(&goflag) == GOFLAG_STOP) {
-                break;
-            }
-        }
-        rcu_read_unlock();
-
-        g_usleep(100);
-    }
-    qemu_mutex_lock(&counts_mutex);
-    n_reads += n_reads_local;
-    qemu_mutex_unlock(&counts_mutex);
-
-    rcu_unregister_thread();
-    return NULL;
-}
-
-
-static void *rcu_q_updater(void *arg)
-{
-    int j, target_el;
-    long long n_nodes_local = 0;
-    long long n_updates_local = 0;
-    long long n_removed_local = 0;
-    struct list_element *el, *prev_el;
-
-    *(struct rcu_reader_data **)arg = &rcu_reader;
-    qatomic_inc(&nthreadsrunning);
-    while (qatomic_read(&goflag) == GOFLAG_INIT) {
-        g_usleep(1000);
-    }
-
-    while (qatomic_read(&goflag) == GOFLAG_RUN) {
-        target_el = select_random_el(RCU_Q_LEN);
-        j = 0;
-        /* FOREACH_RCU could work here but let's use both macros */
-        TEST_LIST_FOREACH_SAFE_RCU(prev_el, &Q_list_head, entry, el) {
-            j++;
-            if (target_el == j) {
-                TEST_LIST_REMOVE_RCU(prev_el, entry);
-                /* may be more than one updater in the future */
-                call_rcu1(&prev_el->rcu, reclaim_list_el);
-                n_removed_local++;
-                break;
-            }
-        }
-        if (qatomic_read(&goflag) == GOFLAG_STOP) {
-            break;
-        }
-        target_el = select_random_el(RCU_Q_LEN);
-        j = 0;
-        TEST_LIST_FOREACH_RCU(el, &Q_list_head, entry) {
-            j++;
-            if (target_el == j) {
-                struct list_element *new_el = g_new(struct list_element, 1);
-                n_nodes_local++;
-                TEST_LIST_INSERT_AFTER_RCU(el, new_el, entry);
-                break;
-            }
-        }
-
-        n_updates_local += 2;
-        synchronize_rcu();
-    }
-    synchronize_rcu();
-    qemu_mutex_lock(&counts_mutex);
-    n_nodes += n_nodes_local;
-    n_updates += n_updates_local;
-    qatomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local);
-    qemu_mutex_unlock(&counts_mutex);
-    return NULL;
-}
-
-static void rcu_qtest_init(void)
-{
-    struct list_element *new_el;
-    int i;
-    nthreadsrunning = 0;
-    srand(time(0));
-    for (i = 0; i < RCU_Q_LEN; i++) {
-        new_el = g_new(struct list_element, 1);
-        TEST_LIST_INSERT_HEAD_RCU(&Q_list_head, new_el, entry);
-    }
-    qemu_mutex_lock(&counts_mutex);
-    n_nodes += RCU_Q_LEN;
-    qemu_mutex_unlock(&counts_mutex);
-}
-
-static void rcu_qtest_run(int duration, int nreaders)
-{
-    int nthreads = nreaders + 1;
-    while (qatomic_read(&nthreadsrunning) < nthreads) {
-        g_usleep(1000);
-    }
-
-    qatomic_set(&goflag, GOFLAG_RUN);
-    sleep(duration);
-    qatomic_set(&goflag, GOFLAG_STOP);
-    wait_all_threads();
-}
-
-
-static void rcu_qtest(const char *test, int duration, int nreaders)
-{
-    int i;
-    long long n_removed_local = 0;
-
-    struct list_element *el, *prev_el;
-
-    rcu_qtest_init();
-    for (i = 0; i < nreaders; i++) {
-        create_thread(rcu_q_reader);
-    }
-    create_thread(rcu_q_updater);
-    rcu_qtest_run(duration, nreaders);
-
-    TEST_LIST_FOREACH_SAFE_RCU(prev_el, &Q_list_head, entry, el) {
-        TEST_LIST_REMOVE_RCU(prev_el, entry);
-        call_rcu1(&prev_el->rcu, reclaim_list_el);
-        n_removed_local++;
-    }
-    qemu_mutex_lock(&counts_mutex);
-    qatomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local);
-    qemu_mutex_unlock(&counts_mutex);
-    synchronize_rcu();
-    while (qatomic_read_i64(&n_nodes_removed) >
-           qatomic_read_i64(&n_reclaims)) {
-        g_usleep(100);
-        synchronize_rcu();
-    }
-    if (g_test_in_charge) {
-        g_assert_cmpint(qatomic_read_i64(&n_nodes_removed), ==,
-                        qatomic_read_i64(&n_reclaims));
-    } else {
-        printf("%s: %d readers; 1 updater; nodes read: "  \
-               "%lld, nodes removed: %"PRIi64"; nodes reclaimed: %"PRIi64"\n",
-               test, nthreadsrunning - 1, n_reads,
-               qatomic_read_i64(&n_nodes_removed),
-               qatomic_read_i64(&n_reclaims));
-        exit(0);
-    }
-}
-
-static void usage(int argc, char *argv[])
-{
-    fprintf(stderr, "Usage: %s duration nreaders\n", argv[0]);
-    exit(-1);
-}
-
-static int gtest_seconds;
-
-static void gtest_rcuq_one(void)
-{
-    rcu_qtest("rcuqtest", gtest_seconds / 4, 1);
-}
-
-static void gtest_rcuq_few(void)
-{
-    rcu_qtest("rcuqtest", gtest_seconds / 4, 5);
-}
-
-static void gtest_rcuq_many(void)
-{
-    rcu_qtest("rcuqtest", gtest_seconds / 2, 20);
-}
-
-
-int main(int argc, char *argv[])
-{
-    int duration = 0, readers = 0;
-
-    qemu_mutex_init(&counts_mutex);
-    if (argc >= 2) {
-        if (argv[1][0] == '-') {
-            g_test_init(&argc, &argv, NULL);
-            if (g_test_quick()) {
-                gtest_seconds = 4;
-            } else {
-                gtest_seconds = 20;
-            }
-            g_test_add_func("/rcu/"TEST_NAME"/single-threaded", gtest_rcuq_one);
-            g_test_add_func("/rcu/"TEST_NAME"/short-few", gtest_rcuq_few);
-            g_test_add_func("/rcu/"TEST_NAME"/long-many", gtest_rcuq_many);
-            g_test_in_charge = 1;
-            return g_test_run();
-        }
-        duration = strtoul(argv[1], NULL, 0);
-    }
-    if (argc >= 3) {
-        readers = strtoul(argv[2], NULL, 0);
-    }
-    if (duration && readers) {
-        rcu_qtest(argv[0], duration, readers);
-        return 0;
-    }
-
-    usage(argc, argv);
-    return -1;
-}