| /* |
| * |
| * Copyright 2017 gRPC authors. |
| * |
| * 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. |
| * |
| */ |
| |
| /* Test of gpr synchronization support. */ |
| |
| #include "src/core/lib/support/spinlock.h" |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/sync.h> |
| #include <grpc/support/thd.h> |
| #include <grpc/support/time.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "test/core/util/test_config.h" |
| |
| /* ------------------------------------------------- */ |
| /* Tests for gpr_spinlock. */ |
| struct test { |
| int thread_count; /* number of threads */ |
| gpr_thd_id* threads; |
| |
| int64_t iterations; /* number of iterations per thread */ |
| int64_t counter; |
| int incr_step; /* how much to increment/decrement refcount each time */ |
| |
| gpr_spinlock mu; /* protects iterations, counter */ |
| }; |
| |
| /* Return pointer to a new struct test. */ |
| static struct test* test_new(int threads, int64_t iterations, int incr_step) { |
| struct test* m = static_cast<struct test*>(gpr_malloc(sizeof(*m))); |
| m->thread_count = threads; |
| m->threads = static_cast<gpr_thd_id*>( |
| gpr_malloc(sizeof(*m->threads) * (size_t)threads)); |
| m->iterations = iterations; |
| m->counter = 0; |
| m->thread_count = 0; |
| m->incr_step = incr_step; |
| m->mu = GPR_SPINLOCK_INITIALIZER; |
| return m; |
| } |
| |
| /* Return pointer to a new struct test. */ |
| static void test_destroy(struct test* m) { |
| gpr_free(m->threads); |
| gpr_free(m); |
| } |
| |
| /* Create m->threads threads, each running (*body)(m) */ |
| static void test_create_threads(struct test* m, void (*body)(void* arg)) { |
| int i; |
| for (i = 0; i != m->thread_count; i++) { |
| gpr_thd_options opt = gpr_thd_options_default(); |
| gpr_thd_options_set_joinable(&opt); |
| GPR_ASSERT( |
| gpr_thd_new(&m->threads[i], "grpc_create_threads", body, m, &opt)); |
| } |
| } |
| |
| /* Wait until all threads report done. */ |
| static void test_wait(struct test* m) { |
| int i; |
| for (i = 0; i != m->thread_count; i++) { |
| gpr_thd_join(m->threads[i]); |
| } |
| } |
| |
| /* Test several threads running (*body)(struct test *m) for increasing settings |
| of m->iterations, until about timeout_s to 2*timeout_s seconds have elapsed. |
| If extra!=NULL, run (*extra)(m) in an additional thread. |
| incr_step controls by how much m->refcount should be incremented/decremented |
| (if at all) each time in the tests. |
| */ |
| static void test(const char* name, void (*body)(void* m), int timeout_s, |
| int incr_step) { |
| int64_t iterations = 1024; |
| struct test* m; |
| gpr_timespec start = gpr_now(GPR_CLOCK_REALTIME); |
| gpr_timespec time_taken; |
| gpr_timespec deadline = gpr_time_add( |
| start, gpr_time_from_micros((int64_t)timeout_s * 1000000, GPR_TIMESPAN)); |
| fprintf(stderr, "%s:", name); |
| while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0) { |
| if (iterations < INT64_MAX / 2) iterations <<= 1; |
| fprintf(stderr, " %ld", (long)iterations); |
| m = test_new(10, iterations, incr_step); |
| test_create_threads(m, body); |
| test_wait(m); |
| if (m->counter != m->thread_count * m->iterations * m->incr_step) { |
| fprintf(stderr, "counter %ld threads %d iterations %ld\n", |
| (long)m->counter, m->thread_count, (long)m->iterations); |
| GPR_ASSERT(0); |
| } |
| test_destroy(m); |
| } |
| time_taken = gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), start); |
| fprintf(stderr, " done %lld.%09d s\n", (long long)time_taken.tv_sec, |
| (int)time_taken.tv_nsec); |
| } |
| |
| /* Increment m->counter on each iteration; then mark thread as done. */ |
| static void inc(void* v /*=m*/) { |
| struct test* m = static_cast<struct test*>(v); |
| int64_t i; |
| for (i = 0; i != m->iterations; i++) { |
| gpr_spinlock_lock(&m->mu); |
| m->counter++; |
| gpr_spinlock_unlock(&m->mu); |
| } |
| } |
| |
| /* Increment m->counter under lock acquired with trylock, m->iterations times; |
| then mark thread as done. */ |
| static void inctry(void* v /*=m*/) { |
| struct test* m = static_cast<struct test*>(v); |
| int64_t i; |
| for (i = 0; i != m->iterations;) { |
| if (gpr_spinlock_trylock(&m->mu)) { |
| m->counter++; |
| gpr_spinlock_unlock(&m->mu); |
| i++; |
| } |
| } |
| } |
| |
| /* ------------------------------------------------- */ |
| |
| int main(int argc, char* argv[]) { |
| grpc_test_init(argc, argv); |
| test("spinlock", &inc, 1, 1); |
| test("spinlock try", &inctry, 1, 1); |
| return 0; |
| } |