* Copyright (c) 2013 Mike D. Day, IBM Corporation.
*/
-#include <glib.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
+#include "qemu/osdep.h"
#include "qemu/atomic.h"
#include "qemu/rcu.h"
-#include "qemu/compiler.h"
-#include "qemu/osdep.h"
#include "qemu/thread.h"
#include "qemu/rcu_queue.h"
* Test variables.
*/
-long long n_reads = 0LL;
-long long n_updates = 0LL;
-long long n_reclaims = 0LL;
-long long n_nodes_removed = 0LL;
-long long n_nodes = 0LL;
-int g_test_in_charge = 0;
+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;
-int nthreadsrunning;
-
-char argsbuf[64];
+static int nthreadsrunning;
#define GOFLAG_INIT 0
#define GOFLAG_RUN 1
#define GOFLAG_STOP 2
-static volatile int goflag = GOFLAG_INIT;
+static int goflag = GOFLAG_INIT;
#define RCU_READ_RUN 1000
#define RCU_UPDATE_RUN 10
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;
+#else
+#error Invalid TEST_LIST_TYPE
+#endif
struct rcu_head rcu;
- long long val;
};
static void reclaim_list_el(struct rcu_head *prcu)
{
struct list_element *el = container_of(prcu, struct list_element, rcu);
g_free(el);
- atomic_add(&n_reclaims, 1);
+ /* Accessed only from call_rcu thread. */
+ atomic_set_i64(&n_reclaims, n_reclaims + 1);
}
-static QLIST_HEAD(q_list_head, list_element) Q_list_head;
+#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
+#else
+#error Invalid TEST_LIST_TYPE
+#endif
static void *rcu_q_reader(void *arg)
{
- long long j, n_reads_local = 0;
+ long long n_reads_local = 0;
struct list_element *el;
+ rcu_register_thread();
+
*(struct rcu_reader_data **)arg = &rcu_reader;
atomic_inc(&nthreadsrunning);
- while (goflag == GOFLAG_INIT) {
+ while (atomic_read(&goflag) == GOFLAG_INIT) {
g_usleep(1000);
}
- while (goflag == GOFLAG_RUN) {
+ while (atomic_read(&goflag) == GOFLAG_RUN) {
rcu_read_lock();
- QLIST_FOREACH_RCU(el, &Q_list_head, entry) {
- j = atomic_read(&el->val);
- (void)j;
+ TEST_LIST_FOREACH_RCU(el, &Q_list_head, entry) {
n_reads_local++;
- if (goflag == GOFLAG_STOP) {
+ if (atomic_read(&goflag) == GOFLAG_STOP) {
break;
}
}
g_usleep(100);
}
- atomic_add(&n_reads, n_reads_local);
+ 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;
atomic_inc(&nthreadsrunning);
- while (goflag == GOFLAG_INIT) {
+ while (atomic_read(&goflag) == GOFLAG_INIT) {
g_usleep(1000);
}
- while (goflag == GOFLAG_RUN) {
+ while (atomic_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 */
- QLIST_FOREACH_SAFE_RCU(prev_el, &Q_list_head, entry, el) {
+ TEST_LIST_FOREACH_SAFE_RCU(prev_el, &Q_list_head, entry, el) {
j++;
if (target_el == j) {
- QLIST_REMOVE_RCU(prev_el, entry);
+ 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 (goflag == GOFLAG_STOP) {
+ if (atomic_read(&goflag) == GOFLAG_STOP) {
break;
}
target_el = select_random_el(RCU_Q_LEN);
j = 0;
- QLIST_FOREACH_RCU(el, &Q_list_head, entry) {
+ TEST_LIST_FOREACH_RCU(el, &Q_list_head, entry) {
j++;
if (target_el == j) {
- prev_el = g_new(struct list_element, 1);
- atomic_add(&n_nodes, 1);
- prev_el->val = atomic_read(&n_nodes);
- QLIST_INSERT_BEFORE_RCU(el, prev_el, entry);
+ struct list_element *new_el = g_new(struct list_element, 1);
+ n_nodes += n_nodes_local;
+ TEST_LIST_INSERT_AFTER_RCU(el, new_el, entry);
break;
}
}
synchronize_rcu();
}
synchronize_rcu();
- atomic_add(&n_updates, n_updates_local);
- atomic_add(&n_nodes_removed, n_removed_local);
+ qemu_mutex_lock(&counts_mutex);
+ n_nodes += n_nodes_local;
+ n_updates += n_updates_local;
+ atomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local);
+ qemu_mutex_unlock(&counts_mutex);
return NULL;
}
srand(time(0));
for (i = 0; i < RCU_Q_LEN; i++) {
new_el = g_new(struct list_element, 1);
- new_el->val = i;
- QLIST_INSERT_HEAD_RCU(&Q_list_head, new_el, entry);
+ TEST_LIST_INSERT_HEAD_RCU(&Q_list_head, new_el, entry);
}
- atomic_add(&n_nodes, RCU_Q_LEN);
+ qemu_mutex_lock(&counts_mutex);
+ n_nodes += RCU_Q_LEN;
+ qemu_mutex_unlock(&counts_mutex);
}
static void rcu_qtest_run(int duration, int nreaders)
g_usleep(1000);
}
- goflag = GOFLAG_RUN;
+ atomic_set(&goflag, GOFLAG_RUN);
sleep(duration);
- goflag = GOFLAG_STOP;
+ atomic_set(&goflag, GOFLAG_STOP);
wait_all_threads();
}
create_thread(rcu_q_updater);
rcu_qtest_run(duration, nreaders);
- QLIST_FOREACH_SAFE_RCU(prev_el, &Q_list_head, entry, el) {
- QLIST_REMOVE_RCU(prev_el, entry);
+ 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++;
}
- atomic_add(&n_nodes_removed, n_removed_local);
+ qemu_mutex_lock(&counts_mutex);
+ atomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local);
+ qemu_mutex_unlock(&counts_mutex);
synchronize_rcu();
- while (n_nodes_removed > n_reclaims) {
+ while (atomic_read_i64(&n_nodes_removed) > atomic_read_i64(&n_reclaims)) {
g_usleep(100);
synchronize_rcu();
}
if (g_test_in_charge) {
- g_assert_cmpint(n_nodes_removed, ==, n_reclaims);
+ g_assert_cmpint(atomic_read_i64(&n_nodes_removed), ==,
+ atomic_read_i64(&n_reclaims));
} else {
printf("%s: %d readers; 1 updater; nodes read: " \
- "%lld, nodes removed: %lld; nodes reclaimed: %lld\n",
- test, nthreadsrunning - 1, n_reads, n_nodes_removed, n_reclaims);
+ "%lld, nodes removed: %"PRIi64"; nodes reclaimed: %"PRIi64"\n",
+ test, nthreadsrunning - 1, n_reads,
+ atomic_read_i64(&n_nodes_removed), atomic_read_i64(&n_reclaims));
exit(0);
}
}
{
int duration = 0, readers = 0;
+ qemu_mutex_init(&counts_mutex);
if (argc >= 2) {
if (argv[1][0] == '-') {
g_test_init(&argc, &argv, NULL);
} else {
gtest_seconds = 20;
}
- g_test_add_func("/rcu/qlist/single-threaded", gtest_rcuq_one);
- g_test_add_func("/rcu/qlist/short-few", gtest_rcuq_few);
- g_test_add_func("/rcu/qlist/long-many", gtest_rcuq_many);
+ 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();
}
projects / mirror_qemu.git / blobdiff