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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/test_kit.h>
#include <vespa/vespalib/util/simple_thread_bundle.h>
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/util/box.h>
#include <thread>
using namespace vespalib;
using namespace vespalib::fixed_thread_bundle;
struct Cnt : Runnable {
size_t x;
Cnt() noexcept : x(0) {}
void run() override { ++x; }
};
struct State {
std::vector<Cnt> cnts;
State(size_t n) : cnts(n) {}
std::vector<Runnable*> getTargets(size_t n) {
ASSERT_LESS_EQUAL(n, cnts.size());
std::vector<Runnable*> targets;
for (size_t i = 0; i < n; ++i) {
targets.push_back(&cnts[i]);
}
return targets;
}
bool check(const std::vector<size_t> &expect) {
bool status = true;
ASSERT_LESS_EQUAL(expect.size(), cnts.size());
for (size_t i = 0; i < expect.size(); ++i) {
status &= EXPECT_EQUAL(expect[i], cnts[i].x);
}
return status;
}
};
struct Blocker : Runnable {
Gate start;
~Blocker() override;
void run() override {
start.await();
}
Gate done; // set externally
};
Blocker::~Blocker() = default;
TEST_MT_FF("require that signals can be counted and cancelled", 2, Signal, size_t(16000)) {
if (thread_id == 0) {
for (size_t i = 0; i < f2; ++i) {
f1.send();
if (i % 128 == 0) { std::this_thread::sleep_for(1ms); }
}
TEST_BARRIER();
f1.cancel();
} else {
size_t localGen = 0;
size_t diffSum = 0;
while (localGen < f2) {
size_t diff = f1.wait(localGen);
EXPECT_GREATER(diff, 0u);
diffSum += diff;
}
EXPECT_EQUAL(f2, localGen);
EXPECT_EQUAL(f2, diffSum);
TEST_BARRIER();
EXPECT_EQUAL(0u, f1.wait(localGen));
EXPECT_EQUAL(f2 + 1, localGen);
}
}
TEST("require that bundles of size 0 cannot be created") {
EXPECT_EXCEPTION(SimpleThreadBundle(0), IllegalArgumentException, "");
}
TEST_FF("require that bundles with no internal threads work", SimpleThreadBundle(1), State(1)) {
f1.run(f2.getTargets(1));
f2.check(Box<size_t>().add(1));
}
TEST_FF("require that bundles can be run without targets", SimpleThreadBundle(1), State(1)) {
f1.run(f2.getTargets(0));
f2.check(Box<size_t>().add(0));
}
TEST_FF("require that having too many targets fails", SimpleThreadBundle(1), State(2)) {
EXPECT_EXCEPTION(f1.run(f2.getTargets(2)), IllegalArgumentException, "");
f2.check(Box<size_t>().add(0).add(0));
}
TEST_F("require that ThreadBundle::trivial works the same as SimpleThreadBundle(1)", State(2)) {
ThreadBundle &bundle = ThreadBundle::trivial();
EXPECT_EQUAL(bundle.size(), 1u);
bundle.run(f.getTargets(0));
f.check({0,0});
bundle.run(f.getTargets(1));
f.check({1,0});
EXPECT_EXCEPTION(bundle.run(f.getTargets(2)), IllegalArgumentException, "");
f.check({1,0});
}
TEST_FF("require that bundles with multiple internal threads work", SimpleThreadBundle(3), State(3)) {
f1.run(f2.getTargets(3));
f2.check(Box<size_t>().add(1).add(1).add(1));
}
TEST_FF("require that bundles can be used multiple times", SimpleThreadBundle(3), State(3)) {
f1.run(f2.getTargets(3));
f1.run(f2.getTargets(3));
f1.run(f2.getTargets(3));
f2.check(Box<size_t>().add(3).add(3).add(3));
}
TEST_FF("require that bundles can be used with fewer than maximum threads", SimpleThreadBundle(3), State(3)) {
f1.run(f2.getTargets(3));
f1.run(f2.getTargets(2));
f1.run(f2.getTargets(1));
f2.check(Box<size_t>().add(3).add(2).add(1));
}
TEST_MT_FFF("require that bundle run waits for all targets", 2, SimpleThreadBundle(4), State(3), Blocker) {
if (thread_id == 0) {
std::vector<Runnable*> targets = f2.getTargets(3);
targets.push_back(&f3);
f1.run(targets);
f2.check(Box<size_t>().add(1).add(1).add(1));
f3.done.countDown();
} else {
EXPECT_FALSE(f3.done.await(20ms));
f3.start.countDown();
EXPECT_TRUE(f3.done.await(10s));
}
}
TEST("require that all strategies work with variable number of threads and targets") {
std::vector<SimpleThreadBundle::Strategy> strategies
= make_box(SimpleThreadBundle::USE_SIGNAL_LIST,
SimpleThreadBundle::USE_SIGNAL_TREE,
SimpleThreadBundle::USE_BROADCAST);
for (size_t s = 0; s < strategies.size(); ++s) {
for (size_t t = 1; t <= 16; ++t) {
State state(t);
SimpleThreadBundle threadBundle(t, strategies[s]);
for (size_t r = 0; r <= t; ++r) {
threadBundle.run(state.getTargets(r));
}
std::vector<size_t> expect;
for (size_t e = 0; e < t; ++e) {
expect.push_back(t - e);
}
if (!state.check(expect)) {
fprintf(stderr, "s:%zu, t:%zu\n", s, t);
}
}
}
}
TEST_F("require that bundle pool gives out bundles", SimpleThreadBundle::Pool(5)) {
SimpleThreadBundle::UP b1 = f1.obtain();
SimpleThreadBundle::UP b2 = f1.obtain();
ASSERT_TRUE(b1.get() != 0);
ASSERT_TRUE(b2.get() != 0);
EXPECT_EQUAL(5u, b1->size());
EXPECT_EQUAL(5u, b2->size());
EXPECT_FALSE(b1.get() == b2.get());
f1.release(std::move(b1));
f1.release(std::move(b2));
}
TEST_F("require that bundles do not need to be put back on the pool", SimpleThreadBundle::Pool(5)) {
SimpleThreadBundle::UP b1 = f1.obtain();
ASSERT_TRUE(b1.get() != 0);
EXPECT_EQUAL(5u, b1->size());
}
TEST_F("require that bundle pool reuses bundles", SimpleThreadBundle::Pool(5)) {
SimpleThreadBundle::UP bundle = f1.obtain();
SimpleThreadBundle *ptr = bundle.get();
f1.release(std::move(bundle));
bundle = f1.obtain();
EXPECT_EQUAL(ptr, bundle.get());
}
TEST_MT_FF("require that bundle pool works with multiple threads", 32, SimpleThreadBundle::Pool(3),
std::vector<SimpleThreadBundle*>(num_threads, 0))
{
SimpleThreadBundle::UP bundle = f1.obtain();
ASSERT_TRUE(bundle.get() != 0);
EXPECT_EQUAL(3u, bundle->size());
f2[thread_id] = bundle.get();
TEST_BARRIER();
if (thread_id == 0) {
for (size_t i = 0; i < num_threads; ++i) {
for (size_t j = 0; j < num_threads; ++j) {
EXPECT_EQUAL((f2[i] == f2[j]), (i == j));
}
}
}
TEST_BARRIER();
f1.release(std::move(bundle));
}
TEST_MAIN() { TEST_RUN_ALL(); }
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