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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/testapp.h>
#include <vespa/vespalib/util/singleexecutor.h>
#include <vespa/vespalib/util/lambdatask.h>
#include <vespa/vespalib/util/alloc.h>
#include <atomic>
using namespace vespalib;
VESPA_THREAD_STACK_TAG(sequenced_executor)
TEST("test that all tasks are executed") {
std::atomic<uint64_t> counter(0);
SingleExecutor executor(sequenced_executor, 10);
for (uint64_t i(0); i < 10; i++) {
executor.execute(makeLambdaTask([&counter] {counter++;}));
}
executor.sync();
EXPECT_EQUAL(10u, counter);
counter = 0;
for (uint64_t i(0); i < 10000; i++) {
executor.execute(makeLambdaTask([&counter] {counter++;}));
}
executor.sync();
EXPECT_EQUAL(10000u, counter);
}
void verifyResizeTaskLimit(bool up) {
std::mutex lock;
std::condition_variable cond;
std::atomic<uint64_t> started(0);
std::atomic<uint64_t> allowed(0);
SingleExecutor executor(sequenced_executor, 10);
uint32_t targetTaskLimit = up ? 20 : 5;
uint32_t roundedTaskLimit = roundUp2inN(targetTaskLimit);
EXPECT_NOT_EQUAL(16u, roundedTaskLimit);
for (uint64_t i(0); i < 10; i++) {
executor.execute(makeLambdaTask([&lock, &cond, &started, &allowed] {
started++;
std::unique_lock guard(lock);
while (allowed < started) {
cond.wait_for(guard, 1ms);
}
}));
}
while (started < 1);
EXPECT_EQUAL(1u, started);
executor.setTaskLimit(targetTaskLimit);
EXPECT_EQUAL(16u, executor.getTaskLimit());
allowed = 5;
while (started < 6);
EXPECT_EQUAL(6u, started);
EXPECT_EQUAL(16u, executor.getTaskLimit());
allowed = 10;
while (started < 10);
EXPECT_EQUAL(10u, started);
EXPECT_EQUAL(16u, executor.getTaskLimit());
executor.execute(makeLambdaTask([&lock, &cond, &started, &allowed] {
started++;
std::unique_lock guard(lock);
while (allowed < started) {
cond.wait_for(guard, 1ms);
}
}));
while (started < 11);
EXPECT_EQUAL(11u, started);
EXPECT_EQUAL(roundedTaskLimit, executor.getTaskLimit());
allowed = 11;
}
TEST("test that resizing up and down works") {
TEST_DO(verifyResizeTaskLimit(true));
TEST_DO(verifyResizeTaskLimit(false));
}
TEST_MAIN() { TEST_RUN_ALL(); }
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