1 // Copyright 2022 The gRPC Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "src/core/lib/event_engine/posix_engine/timer_manager.h"
16
17 #include <atomic>
18 #include <memory>
19 #include <random>
20
21 #include "absl/functional/any_invocable.h"
22 #include "absl/time/clock.h"
23 #include "absl/time/time.h"
24 #include "gtest/gtest.h"
25
26 #include <grpc/grpc.h>
27 #include <grpc/support/log.h>
28
29 #include "src/core/lib/event_engine/common_closures.h"
30 #include "src/core/lib/event_engine/posix_engine/timer.h"
31 #include "src/core/lib/event_engine/thread_pool/thread_pool.h"
32 #include "src/core/lib/iomgr/exec_ctx.h"
33 #include "test/core/util/test_config.h"
34
35 namespace grpc_event_engine {
36 namespace experimental {
37
TEST(TimerManagerTest,StressTest)38 TEST(TimerManagerTest, StressTest) {
39 grpc_core::ExecCtx exec_ctx;
40 auto now = grpc_core::Timestamp::Now();
41 auto test_deadline = now + grpc_core::Duration::Seconds(15);
42 std::vector<Timer> timers;
43 constexpr int kTimerCount = 500;
44 timers.resize(kTimerCount);
45 std::atomic_int called{0};
46 std::random_device rd;
47 std::mt19937 gen(rd());
48 std::uniform_real_distribution<> dis_millis(100, 3000);
49 auto pool = MakeThreadPool(8);
50 {
51 TimerManager manager(pool);
52 for (auto& timer : timers) {
53 exec_ctx.InvalidateNow();
54 manager.TimerInit(
55 &timer, now + grpc_core::Duration::Milliseconds(dis_millis(gen)),
56 experimental::SelfDeletingClosure::Create([&called]() {
57 absl::SleepFor(absl::Milliseconds(50));
58 ++called;
59 }));
60 }
61 // Wait for all callbacks to have been called
62 while (called.load(std::memory_order_relaxed) < kTimerCount) {
63 exec_ctx.InvalidateNow();
64 if (grpc_core::Timestamp::Now() > test_deadline) {
65 FAIL() << "Deadline exceeded. "
66 << called.load(std::memory_order_relaxed) << "/" << kTimerCount
67 << " callbacks executed";
68 }
69 gpr_log(GPR_DEBUG, "Processed %d/%d callbacks",
70 called.load(std::memory_order_relaxed), kTimerCount);
71 absl::SleepFor(absl::Milliseconds(333));
72 }
73 }
74 pool->Quiesce();
75 }
76
TEST(TimerManagerTest,ShutDownBeforeAllCallbacksAreExecuted)77 TEST(TimerManagerTest, ShutDownBeforeAllCallbacksAreExecuted) {
78 // Should the internal timer_list complain in this scenario?
79 grpc_core::ExecCtx exec_ctx;
80 std::vector<Timer> timers;
81 constexpr int kTimerCount = 100;
82 timers.resize(kTimerCount);
83 std::atomic_int called{0};
84 experimental::AnyInvocableClosure closure([&called] { ++called; });
85 auto pool = MakeThreadPool(8);
86 {
87 TimerManager manager(pool);
88 for (auto& timer : timers) {
89 manager.TimerInit(&timer, grpc_core::Timestamp::InfFuture(), &closure);
90 }
91 }
92 ASSERT_EQ(called.load(), 0);
93 pool->Quiesce();
94 }
95
96 } // namespace experimental
97 } // namespace grpc_event_engine
98
main(int argc,char ** argv)99 int main(int argc, char** argv) {
100 grpc::testing::TestEnvironment env(&argc, argv);
101 ::testing::InitGoogleTest(&argc, argv);
102 grpc_init();
103 int ret = RUN_ALL_TESTS();
104 grpc_shutdown();
105 return ret;
106 }
107