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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. 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.
*/
/*
* Copyright (C) 2015 Cloudius Systems, Ltd.
*/
#include <seastar/testing/test_case.hh>
#include <seastar/testing/thread_test_case.hh>
#include <seastar/core/distributed.hh>
#include <seastar/core/loop.hh>
#include <seastar/core/semaphore.hh>
#include <seastar/core/sleep.hh>
#include <seastar/core/thread.hh>
#include <seastar/core/print.hh>
#include <seastar/util/defer.hh>
#include <mutex>
using namespace seastar;
using namespace std::chrono_literals;
struct async_service : public seastar::async_sharded_service<async_service> {
thread_local static bool deleted;
~async_service() {
deleted = true;
}
void run() {
auto ref = shared_from_this();
// Wait a while and check.
(void)sleep(std::chrono::milliseconds(100 + 100 * this_shard_id())).then([this, ref] {
check();
});
}
virtual void check() {
assert(!deleted);
}
future<> stop() { return make_ready_future<>(); }
};
thread_local bool async_service::deleted = false;
struct X {
sstring echo(sstring arg) {
return arg;
}
int cpu_id_squared() const {
auto id = this_shard_id();
return id * id;
}
future<> stop() { return make_ready_future<>(); }
};
template <typename T, typename Func>
future<> do_with_distributed(Func&& func) {
auto x = make_shared<distributed<T>>();
return func(*x).finally([x] {
return x->stop();
}).finally([x]{});
}
SEASTAR_TEST_CASE(test_that_each_core_gets_the_arguments) {
return do_with_distributed<X>([] (auto& x) {
return x.start().then([&x] {
return x.map_reduce([] (sstring msg){
if (msg != "hello") {
throw std::runtime_error("wrong message");
}
}, &X::echo, sstring("hello"));
});
});
}
SEASTAR_TEST_CASE(test_functor_version) {
return do_with_distributed<X>([] (auto& x) {
return x.start().then([&x] {
return x.map_reduce([] (sstring msg){
if (msg != "hello") {
throw std::runtime_error("wrong message");
}
}, [] (X& x) { return x.echo("hello"); });
});
});
}
struct Y {
sstring s;
Y(sstring s) : s(std::move(s)) {}
future<> stop() { return make_ready_future<>(); }
};
SEASTAR_TEST_CASE(test_constructor_argument_is_passed_to_each_core) {
return do_with_distributed<Y>([] (auto& y) {
return y.start(sstring("hello")).then([&y] {
return y.invoke_on_all([] (Y& y) {
if (y.s != "hello") {
throw std::runtime_error(format("expected message mismatch, is \"%s\"", y.s));
}
});
});
});
}
SEASTAR_TEST_CASE(test_map_reduce) {
return do_with_distributed<X>([] (distributed<X>& x) {
return x.start().then([&x] {
return x.map_reduce0(std::mem_fn(&X::cpu_id_squared),
0,
std::plus<int>()).then([] (int result) {
int n = smp::count - 1;
if (result != (n * (n + 1) * (2*n + 1)) / 6) {
throw std::runtime_error("map_reduce failed");
}
});
});
});
}
SEASTAR_TEST_CASE(test_async) {
return do_with_distributed<async_service>([] (distributed<async_service>& x) {
return x.start().then([&x] {
return x.invoke_on_all(&async_service::run);
});
}).then([] {
return sleep(std::chrono::milliseconds(100 * (smp::count + 1)));
});
}
SEASTAR_TEST_CASE(test_invoke_on_others) {
return seastar::async([] {
struct my_service {
int counter = 0;
void up() { ++counter; }
future<> stop() { return make_ready_future<>(); }
};
for (unsigned c = 0; c < smp::count; ++c) {
smp::submit_to(c, [c] {
return seastar::async([c] {
sharded<my_service> s;
s.start().get();
s.invoke_on_others([](auto& s) { s.up(); }).get();
if (s.local().counter != 0) {
throw std::runtime_error("local modified");
}
s.invoke_on_all([c](auto& remote) {
if (this_shard_id() != c) {
if (remote.counter != 1) {
throw std::runtime_error("remote not modified");
}
}
}).get();
s.stop().get();
});
}).get();
}
});
}
struct remote_worker {
unsigned current = 0;
unsigned max_concurrent_observed = 0;
unsigned expected_max;
semaphore sem{0};
remote_worker(unsigned expected_max) : expected_max(expected_max) {
}
future<> do_work() {
++current;
max_concurrent_observed = std::max(current, max_concurrent_observed);
if (max_concurrent_observed >= expected_max && sem.current() == 0) {
sem.signal(semaphore::max_counter());
}
return sem.wait().then([this] {
// Sleep a bit to check if the concurrency goes over the max
return sleep(100ms).then([this] {
max_concurrent_observed = std::max(current, max_concurrent_observed);
--current;
});
});
}
future<> do_remote_work(shard_id t, smp_service_group ssg) {
return smp::submit_to(t, ssg, [this] {
return do_work();
});
}
};
SEASTAR_TEST_CASE(test_smp_service_groups) {
return async([] {
smp_service_group_config ssgc1;
ssgc1.max_nonlocal_requests = 1;
auto ssg1 = create_smp_service_group(ssgc1).get0();
smp_service_group_config ssgc2;
ssgc2.max_nonlocal_requests = 1000;
auto ssg2 = create_smp_service_group(ssgc2).get0();
shard_id other_shard = smp::count - 1;
remote_worker rm1(1);
remote_worker rm2(1000);
auto bunch1 = parallel_for_each(boost::irange(0, 20), [&] (int ignore) { return rm1.do_remote_work(other_shard, ssg1); });
auto bunch2 = parallel_for_each(boost::irange(0, 2000), [&] (int ignore) { return rm2.do_remote_work(other_shard, ssg2); });
bunch1.get();
bunch2.get();
if (smp::count > 1) {
assert(rm1.max_concurrent_observed == 1);
assert(rm2.max_concurrent_observed == 1000);
}
destroy_smp_service_group(ssg1).get();
destroy_smp_service_group(ssg2).get();
});
}
SEASTAR_TEST_CASE(test_smp_service_groups_re_construction) {
// During development of the feature, we saw a bug where the vector
// holding the groups did not expand correctly. This test triggers the
// bug.
return async([] {
auto ssg1 = create_smp_service_group({}).get0();
auto ssg2 = create_smp_service_group({}).get0();
destroy_smp_service_group(ssg1).get();
auto ssg3 = create_smp_service_group({}).get0();
destroy_smp_service_group(ssg2).get();
destroy_smp_service_group(ssg3).get();
});
}
SEASTAR_TEST_CASE(test_smp_timeout) {
return async([] {
smp_service_group_config ssgc1;
ssgc1.max_nonlocal_requests = 1;
auto ssg1 = create_smp_service_group(ssgc1).get0();
auto _ = defer([ssg1] {
destroy_smp_service_group(ssg1).get();
});
const shard_id other_shard = smp::count - 1;
// Ugly but beats using sleeps.
std::mutex mut;
std::unique_lock<std::mutex> lk(mut);
// Submitted to the remote shard.
auto fut1 = smp::submit_to(other_shard, ssg1, [&mut] {
std::cout << "Running request no. 1" << std::endl;
std::unique_lock<std::mutex> lk(mut);
std::cout << "Request no. 1 done" << std::endl;
});
// Consume the only unit from the semaphore.
auto fut2 = smp::submit_to(other_shard, ssg1, [] {
std::cout << "Running request no. 2 - done" << std::endl;
});
auto fut_timedout = smp::submit_to(other_shard, smp_submit_to_options(ssg1, smp_timeout_clock::now() + 10ms), [] {
std::cout << "Running timed-out request - done" << std::endl;
});
{
auto notify = defer([lk = std::move(lk)] { });
try {
fut_timedout.get();
throw std::runtime_error("smp::submit_to() didn't timeout as expected");
} catch (semaphore_timed_out& e) {
std::cout << "Expected timeout received: " << e.what() << std::endl;
} catch (...) {
std::throw_with_nested(std::runtime_error("smp::submit_to() failed with unexpected exception"));
}
}
fut1.get();
fut2.get();
});
}
SEASTAR_THREAD_TEST_CASE(test_sharded_parameter) {
struct dependency {
unsigned val = this_shard_id() * 7;
};
struct some_service {
bool ok = false;
some_service(unsigned non_shard_dependent, unsigned shard_dependent, dependency& dep, unsigned shard_dependent_2) {
ok =
non_shard_dependent == 43
&& shard_dependent == this_shard_id() * 3
&& dep.val == this_shard_id() * 7
&& shard_dependent_2 == -dep.val;
}
};
sharded<dependency> s_dep;
s_dep.start().get();
auto undo1 = defer([&] { s_dep.stop().get(); });
sharded<some_service> s_service;
s_service.start(
43, // should be copied verbatim
sharded_parameter([] { return this_shard_id() * 3; }),
std::ref(s_dep),
sharded_parameter([] (dependency& d) { return -d.val; }, std::ref(s_dep))
).get();
auto undo2 = defer([&] { s_service.stop().get(); });
auto all_ok = s_service.map_reduce0(std::mem_fn(&some_service::ok), true, std::multiplies<>()).get0();
BOOST_REQUIRE(all_ok);
}
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