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/*
* Copyright (c) 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#undef NDEBUG
#include "fatal-signal.h"
#include "ovs-atomic.h"
#include "ovstest.h"
#include "ovs-thread.h"
#include "timeval.h"
#include "util.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(test_atomic);
#define TEST_ATOMIC_TYPE(ATOMIC_TYPE, BASE_TYPE) \
{ \
ATOMIC_TYPE x = 1; \
BASE_TYPE value, orig; \
\
atomic_read(&x, &value); \
ovs_assert(value == 1); \
\
atomic_store(&x, 2); \
atomic_read(&x, &value); \
ovs_assert(value == 2); \
\
atomic_init(&x, 3); \
atomic_read(&x, &value); \
ovs_assert(value == 3); \
\
atomic_add(&x, 1, &orig); \
ovs_assert(orig == 3); \
atomic_read(&x, &value); \
ovs_assert(value == 4); \
\
atomic_sub(&x, 2, &orig); \
ovs_assert(orig == 4); \
atomic_read(&x, &value); \
ovs_assert(value == 2); \
\
atomic_or(&x, 6, &orig); \
ovs_assert(orig == 2); \
atomic_read(&x, &value); \
ovs_assert(value == 6); \
\
atomic_and(&x, 10, &orig); \
ovs_assert(orig == 6); \
atomic_read(&x, &value); \
ovs_assert(value == 2); \
\
atomic_xor(&x, 10, &orig); \
ovs_assert(orig == 2); \
atomic_read(&x, &value); \
ovs_assert(value == 8); \
}
#define TEST_ATOMIC_TYPE_EXPLICIT(ATOMIC_TYPE, BASE_TYPE, \
ORDER_READ, ORDER_STORE, ORDER_RMW) \
{ \
ATOMIC_TYPE x = 1; \
BASE_TYPE value, orig; \
\
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 1); \
\
atomic_store_explicit(&x, 2, ORDER_STORE); \
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 2); \
\
atomic_init(&x, 3); \
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 3); \
\
atomic_add_explicit(&x, 1, &orig, ORDER_RMW); \
ovs_assert(orig == 3); \
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 4); \
\
atomic_sub_explicit(&x, 2, &orig, ORDER_RMW); \
ovs_assert(orig == 4); \
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 2); \
\
atomic_or_explicit(&x, 6, &orig, ORDER_RMW); \
ovs_assert(orig == 2); \
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 6); \
\
atomic_and_explicit(&x, 10, &orig, ORDER_RMW); \
ovs_assert(orig == 6); \
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 2); \
\
atomic_xor_explicit(&x, 10, &orig, ORDER_RMW); \
ovs_assert(orig == 2); \
atomic_read_explicit(&x, &value, ORDER_READ); \
ovs_assert(value == 8); \
}
#define TEST_ATOMIC_ORDER(ORDER_READ, ORDER_STORE, ORDER_RMW) \
{ \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_char, char, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_uchar, unsigned char, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_schar, signed char, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_short, short, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_ushort, unsigned short, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_int, int, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_uint, unsigned int, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_long, long int, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_ulong, unsigned long int, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_llong, long long int, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_ullong, unsigned long long int, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_size_t, size_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_ptrdiff_t, ptrdiff_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_intmax_t, intmax_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_uintmax_t, uintmax_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_intptr_t, intptr_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_uintptr_t, uintptr_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_uint8_t, uint8_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_int8_t, int8_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_uint16_t, uint16_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_int16_t, int16_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_uint32_t, uint32_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
TEST_ATOMIC_TYPE_EXPLICIT(atomic_int32_t, int32_t, \
ORDER_READ, ORDER_STORE, ORDER_RMW); \
}
static void
test_atomic_flag(void)
{
atomic_flag flag = ATOMIC_FLAG_INIT;
ovs_assert(atomic_flag_test_and_set(&flag) == false);
ovs_assert(atomic_flag_test_and_set(&flag) == true);
atomic_flag_clear(&flag);
ovs_assert(atomic_flag_test_and_set(&flag) == false);
}
static uint32_t a;
struct atomic_aux {
ATOMIC(uint64_t) count;
uint32_t b;
ATOMIC(uint32_t *) data;
ATOMIC(uint64_t) data64;
};
static ATOMIC(struct atomic_aux *) paux = NULL;
static struct atomic_aux *auxes = NULL;
#define ATOMIC_ITEM_COUNT 1000000
#define DURATION 5000
static void *
atomic_consumer(void * arg1 OVS_UNUSED)
{
struct atomic_aux *old_aux = NULL;
uint64_t count;
long long int stop_time = time_msec() + DURATION;
do {
struct atomic_aux *aux;
uint32_t b;
/* Wait for a new item. We may not be fast enough to process every
* item, but we are guaranteed to see the last one. */
do {
atomic_read_explicit(&paux, &aux, memory_order_consume);
} while (aux == old_aux);
b = aux->b;
atomic_read_explicit(&aux->count, &count, memory_order_relaxed);
ovs_assert(b == count + 42);
old_aux = aux;
} while (count < ATOMIC_ITEM_COUNT - 1 && time_msec() < stop_time);
if (time_msec() >= stop_time) {
if (count < 10) {
VLOG_WARN("atomic_consumer test stopped due to excessive runtime. "
"Count = %"PRIu64, count);
}
}
return NULL;
}
static void *
atomic_producer(void * arg1 OVS_UNUSED)
{
size_t i;
for (i = 0; i < ATOMIC_ITEM_COUNT; i++) {
struct atomic_aux *aux = &auxes[i];
aux->count = i;
aux->b = i + 42;
/* Publish the new item. */
atomic_store_explicit(&paux, aux, memory_order_release);
}
return NULL;
}
static void
test_cons_rel(void)
{
pthread_t reader, writer;
atomic_init(&paux, NULL);
auxes = xmalloc(sizeof *auxes * ATOMIC_ITEM_COUNT);
reader = ovs_thread_create("consumer", atomic_consumer, NULL);
writer = ovs_thread_create("producer", atomic_producer, NULL);
xpthread_join(reader, NULL);
xpthread_join(writer, NULL);
free(auxes);
}
static void *
atomic_reader(void *aux_)
{
struct atomic_aux *aux = aux_;
uint64_t count;
uint64_t data;
long long int now = time_msec();
long long int stop_time = now + DURATION;
do {
/* Non-synchronized add. */
atomic_add_explicit(&aux->count, 1, &count, memory_order_relaxed);
do {
atomic_read_explicit(&aux->data64, &data, memory_order_acquire);
} while (!data && (now = time_msec()) < stop_time);
if (now >= stop_time) {
if (count < 10) {
VLOG_WARN("atomic_reader test stopped due to excessive "
"runtime. Count = %"PRIu64, count);
}
break;
}
ovs_assert(data == a && data == aux->b && a == aux->b);
atomic_read_explicit(&aux->count, &count, memory_order_relaxed);
ovs_assert(count == 2 * a && count == 2 * aux->b && count == 2 * data);
atomic_store_explicit(&aux->data64, UINT64_C(0), memory_order_release);
} while (count < 2 * ATOMIC_ITEM_COUNT);
return NULL;
}
static void *
atomic_writer(void *aux_)
{
struct atomic_aux *aux = aux_;
uint64_t old_count;
uint64_t data;
size_t i;
long long int now = time_msec();
long long int stop_time = now + DURATION;
for (i = 0; i < ATOMIC_ITEM_COUNT; i++) {
/* Wait for the reader to be done with the data. */
do {
atomic_read_explicit(&aux->data64, &data, memory_order_acquire);
} while (data && (now = time_msec()) < stop_time);
if (now >= stop_time) {
if (i < 10) {
VLOG_WARN("atomic_writer test stopped due to excessive "
"runtime, Count = %"PRIuSIZE, i);
}
break;
}
a = i + 1;
atomic_add_explicit(&aux->count, 1, &old_count, memory_order_relaxed);
aux->b++;
atomic_store_explicit(&aux->data64,
(i & 1) ? (uint64_t)aux->b : a, memory_order_release);
}
return NULL;
}
static void
test_acq_rel(void)
{
pthread_t reader, writer;
struct atomic_aux *aux = xmalloc(sizeof *aux);
a = 0;
aux->b = 0;
aux->count = 0;
atomic_init(&aux->data, NULL);
aux->data64 = 0;
reader = ovs_thread_create("reader", atomic_reader, aux);
writer = ovs_thread_create("writer", atomic_writer, aux);
xpthread_join(reader, NULL);
xpthread_join(writer, NULL);
free(aux);
}
static void
test_atomic_plain(void)
{
TEST_ATOMIC_TYPE(atomic_char, char);
TEST_ATOMIC_TYPE(atomic_uchar, unsigned char);
TEST_ATOMIC_TYPE(atomic_schar, signed char);
TEST_ATOMIC_TYPE(atomic_short, short);
TEST_ATOMIC_TYPE(atomic_ushort, unsigned short);
TEST_ATOMIC_TYPE(atomic_int, int);
TEST_ATOMIC_TYPE(atomic_uint, unsigned int);
TEST_ATOMIC_TYPE(atomic_long, long int);
TEST_ATOMIC_TYPE(atomic_ulong, unsigned long int);
TEST_ATOMIC_TYPE(atomic_llong, long long int);
TEST_ATOMIC_TYPE(atomic_ullong, unsigned long long int);
TEST_ATOMIC_TYPE(atomic_size_t, size_t);
TEST_ATOMIC_TYPE(atomic_ptrdiff_t, ptrdiff_t);
TEST_ATOMIC_TYPE(atomic_intmax_t, intmax_t);
TEST_ATOMIC_TYPE(atomic_uintmax_t, uintmax_t);
TEST_ATOMIC_TYPE(atomic_intptr_t, intptr_t);
TEST_ATOMIC_TYPE(atomic_uintptr_t, uintptr_t);
TEST_ATOMIC_TYPE(atomic_uint8_t, uint8_t);
TEST_ATOMIC_TYPE(atomic_int8_t, int8_t);
TEST_ATOMIC_TYPE(atomic_uint16_t, uint16_t);
TEST_ATOMIC_TYPE(atomic_int16_t, int16_t);
TEST_ATOMIC_TYPE(atomic_uint32_t, uint32_t);
TEST_ATOMIC_TYPE(atomic_int32_t, int32_t);
TEST_ATOMIC_TYPE(atomic_uint64_t, uint64_t);
TEST_ATOMIC_TYPE(atomic_int64_t, int64_t);
}
static void
test_atomic_relaxed(void)
{
TEST_ATOMIC_ORDER(memory_order_relaxed, memory_order_relaxed,
memory_order_relaxed);
}
static void
test_atomic_consume(void)
{
TEST_ATOMIC_ORDER(memory_order_consume, memory_order_release,
memory_order_release);
}
static void
test_atomic_acquire(void)
{
TEST_ATOMIC_ORDER(memory_order_acquire, memory_order_release,
memory_order_release);
}
static void
test_atomic_acq_rel(void)
{
TEST_ATOMIC_ORDER(memory_order_acquire, memory_order_release,
memory_order_acq_rel);
}
static void
test_atomic_seq_cst(void)
{
TEST_ATOMIC_ORDER(memory_order_seq_cst, memory_order_seq_cst,
memory_order_seq_cst);
}
static void
test_atomic_main(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
fatal_signal_init();
test_atomic_plain();
test_atomic_relaxed();
test_atomic_consume();
test_atomic_acquire();
test_atomic_acq_rel();
test_atomic_seq_cst();
test_atomic_flag();
test_acq_rel();
test_cons_rel();
}
OVSTEST_REGISTER("test-atomic", test_atomic_main);
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