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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/util/adaptive_sequenced_executor.h>
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vespalib/test/insertion_operators.h>
#include <condition_variable>
#include <unistd.h>
#include <vespa/log/log.h>
LOG_SETUP("adaptive_sequenced_executor_test");
namespace vespalib {
class Fixture
{
public:
AdaptiveSequencedExecutor _threads;
Fixture(bool is_max_pending_hard=true) : _threads(2, 2, 0, 1000, is_max_pending_hard) { }
};
class TestObj
{
public:
std::mutex _m;
std::condition_variable _cv;
int _done;
int _fail;
int _val;
TestObj() noexcept
: _m(),
_cv(),
_done(0),
_fail(0),
_val(0)
{
}
void
modify(int oldValue, int newValue)
{
{
std::lock_guard<std::mutex> guard(_m);
if (_val == oldValue) {
_val = newValue;
} else {
++_fail;
}
++_done;
_cv.notify_all();
}
}
void
wait(int wantDone)
{
std::unique_lock<std::mutex> guard(_m);
_cv.wait(guard, [&] { return this->_done >= wantDone; });
}
};
vespalib::stringref ZERO("0");
TEST_F("testExecute", Fixture) {
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
f._threads.execute(1, [&]() { tv->modify(0, 42); });
tv->wait(1);
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
}
TEST_F("require that task with same component id are serialized", Fixture)
{
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
f._threads.execute(0, [&]() { usleep(2000); tv->modify(0, 14); });
f._threads.execute(0, [&]() { tv->modify(14, 42); });
tv->wait(2);
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
}
TEST_F("require that task with different component ids are not serialized", Fixture)
{
int tryCnt = 0;
for (tryCnt = 0; tryCnt < 100; ++tryCnt) {
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
f._threads.execute(0, [&]() { usleep(2000); tv->modify(0, 14); });
f._threads.execute(1, [&]() { tv->modify(14, 42); });
tv->wait(2);
if (tv->_fail != 1) {
continue;
}
EXPECT_EQUAL(1, tv->_fail);
EXPECT_EQUAL(14, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(1, tv->_fail);
EXPECT_EQUAL(14, tv->_val);
break;
}
EXPECT_TRUE(tryCnt < 100);
}
TEST_F("require that task with same string component id are serialized", Fixture)
{
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
auto test2 = [&]() { tv->modify(14, 42); };
f._threads.execute(f._threads.getExecutorIdFromName(ZERO), [&]() { usleep(2000); tv->modify(0, 14); });
f._threads.execute(f._threads.getExecutorIdFromName(ZERO), test2);
tv->wait(2);
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
}
namespace {
int detectSerializeFailure(Fixture &f, vespalib::stringref altComponentId, int tryLimit)
{
int tryCnt = 0;
for (tryCnt = 0; tryCnt < tryLimit; ++tryCnt) {
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
f._threads.execute(f._threads.getExecutorIdFromName(ZERO), [&]() { usleep(2000); tv->modify(0, 14); });
f._threads.execute(f._threads.getExecutorIdFromName(altComponentId), [&]() { tv->modify(14, 42); });
tv->wait(2);
if (tv->_fail != 1) {
continue;
}
EXPECT_EQUAL(1, tv->_fail);
EXPECT_EQUAL(14, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(1, tv->_fail);
EXPECT_EQUAL(14, tv->_val);
break;
}
return tryCnt;
}
vespalib::string makeAltComponentId(Fixture &f)
{
int tryCnt = 0;
char altComponentId[20];
ISequencedTaskExecutor::ExecutorId executorId0 = f._threads.getExecutorIdFromName(ZERO);
for (tryCnt = 1; tryCnt < 100; ++tryCnt) {
snprintf(altComponentId, sizeof(altComponentId), "%d", tryCnt);
if (f._threads.getExecutorIdFromName(altComponentId) == executorId0) {
break;
}
}
EXPECT_TRUE(tryCnt < 100);
return altComponentId;
}
}
TEST_F("require that task with different string component ids are not serialized", Fixture)
{
int tryCnt = detectSerializeFailure(f, "2", 100);
EXPECT_TRUE(tryCnt < 100);
}
TEST_F("require that task with different string component ids mapping to the same executor id are serialized",
Fixture)
{
vespalib::string altComponentId = makeAltComponentId(f);
LOG(info, "second string component id is \"%s\"", altComponentId.c_str());
int tryCnt = detectSerializeFailure(f, altComponentId, 100);
EXPECT_TRUE(tryCnt == 100);
}
TEST_F("require that execute works with const lambda", Fixture)
{
int i = 5;
std::vector<int> res;
const auto lambda = [i, &res]() mutable
{ res.push_back(i--); res.push_back(i--); };
f._threads.execute(0, lambda);
f._threads.execute(0, lambda);
f._threads.sync_all();
std::vector<int> exp({5, 4, 5, 4});
EXPECT_EQUAL(exp, res);
EXPECT_EQUAL(5, i);
}
TEST_F("require that execute works with reference to lambda", Fixture)
{
int i = 5;
std::vector<int> res;
auto lambda = [i, &res]() mutable
{ res.push_back(i--); res.push_back(i--); };
auto &lambdaref = lambda;
f._threads.execute(0, lambdaref);
f._threads.execute(0, lambdaref);
f._threads.sync_all();
std::vector<int> exp({5, 4, 5, 4});
EXPECT_EQUAL(exp, res);
EXPECT_EQUAL(5, i);
}
TEST_F("require that executeLambda works", Fixture)
{
int i = 5;
std::vector<int> res;
const auto lambda = [i, &res]() mutable
{ res.push_back(i--); res.push_back(i--); };
f._threads.executeLambda(ISequencedTaskExecutor::ExecutorId(0), lambda);
f._threads.sync_all();
std::vector<int> exp({5, 4});
EXPECT_EQUAL(exp, res);
EXPECT_EQUAL(5, i);
}
TEST("require that you get correct number of executors") {
AdaptiveSequencedExecutor seven(7, 1, 0, 10, true);
EXPECT_EQUAL(7u, seven.getNumExecutors());
}
TEST("require that you distribute well") {
AdaptiveSequencedExecutor seven(7, 1, 0, 10, true);
EXPECT_EQUAL(7u, seven.getNumExecutors());
for (uint32_t id=0; id < 1000; id++) {
EXPECT_EQUAL(id%7, seven.getExecutorId(id).getId());
}
}
}
TEST_MAIN() { TEST_RUN_ALL(); }
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