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Change simple thread pool shrinking to non-blocking mode

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obdev 2024-12-16 13:15:13 +00:00 committed by ob-robot
parent 102efcb12a
commit 01b7d9d007
8 changed files with 114 additions and 47 deletions
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56
deps/oblib/src/lib/task/ob_timer_service.cpp vendored
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@ -10,6 +10,7 @@
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX COMMON
#include "lib/task/ob_timer_service.h"
#include "lib/task/ob_timer_monitor.h" // ObTimerMonitor
#include "lib/thread/thread_mgr.h" // get_tenant_tg_helper
@ -55,10 +56,17 @@ TaskToken::TaskToken(
const int64_t st,
const int64_t dt)
: timer_(timer), task_(task), scheduled_time_(st), delay_(dt)
{}
{
char *buf = task_type_;
int buf_len = sizeof(task_type_);
if (task != NULL) {
strncpy(buf, typeid(*task).name(), buf_len);
}
buf[buf_len - 1] = '\0';
}
TaskToken::TaskToken(const ObTimer *timer, ObTimerTask *task)
: timer_(timer), task_(task), scheduled_time_(0L), delay_(0L)
: TaskToken(timer, task, 0, 0)
{}
TaskToken::~TaskToken()
@ -72,6 +80,11 @@ TaskToken::~TaskToken()
void ObTimerTaskThreadPool::handle(void *task_token)
{
TaskToken *token = reinterpret_cast<TaskToken *>(task_token);
const int64_t delay =
ObSysTime::now().toMicroSeconds() - token->scheduled_time_;
if (delay > 10 * 1000 * 1000) {
LOG_WARN_RET(OB_SUCCESS, "timer task too much delay", K(*token), K(delay));
}
if (nullptr == token) {
OB_LOG_RET(WARN, OB_ERR_NULL_VALUE, "TaskToken is NULL", K(ret));
} else if (nullptr == token->task_) {
@ -190,7 +203,7 @@ void ObTimerService::stop()
while (priority_task_queue_.size() > 0
|| running_task_set_.size() > 0
|| uncanceled_task_set_.size() > 0) {
(void)monitor_.timed_wait(ObSysTime(WAIT_INTERVAL_US));
(void)monitor_.timed_wait(ObSysTime(MIN_WAIT_INTERVAL));
}
}
// STEP6: stop worker threads and the scheduling thread
@ -229,7 +242,7 @@ int ObTimerService::schedule_task(
ret = OB_INVALID_ARGUMENT;
OB_LOG(WARN, "invalid argument", K(delay), K_(tenant_id), K(ret));
} else {
int64_t time = ObSysTime::now(ObSysTime::Monotonic).toMicroSeconds();
int64_t time = ObSysTime::now().toMicroSeconds();
TaskToken *token = nullptr;
if (OB_FAIL(new_token(
token,
@ -329,7 +342,7 @@ int ObTimerService::wait_task(const ObTimer *timer, const ObTimerTask *task)
if (!exist) {
break;
} else {
IGNORE_RETURN monitor_.timed_wait(ObSysTime(WAIT_INTERVAL_US));
IGNORE_RETURN monitor_.timed_wait(ObSysTime(MIN_WAIT_INTERVAL));
}
} while (true);
}
@ -377,7 +390,7 @@ int ObTimerService::schedule_task(TaskToken *token)
if (0 == token->delay_ || is_stopped_) { // no need re-schedule
delete_token(token);
} else { // re-schedule
int64_t time = ObSysTime::now(ObSysTime::Monotonic).toMicroSeconds();
int64_t time = ObSysTime::now().toMicroSeconds();
token->scheduled_time_ = time + token->delay_;
VecIter pos;
if (OB_FAIL(
@ -508,19 +521,9 @@ void ObTimerService::run1()
while(true) {
IGNORE_RETURN lib::Thread::update_loop_ts();
{ // lock
ObMonitor<Mutex>::Lock guard(monitor_);
if (REACH_TIME_INTERVAL(DUMP_INTERVAL_US)) {
OB_LOG(INFO, "dump TaskToken info [summary]",
KP(this), K_(tenant_id), "token_num", priority_task_queue_.size());
for (int64_t idx = 0L; idx < priority_task_queue_.size(); ++idx) {
TaskToken *token = priority_task_queue_.at(idx);
OB_LOG(INFO, "dump TaskToken info", KP(token), KPC(token));
}
}
while(!is_stopped_ && 0 == priority_task_queue_.size()) {
monitor_.wait();
}
@ -528,7 +531,10 @@ void ObTimerService::run1()
break;
}
while(priority_task_queue_.size() > 0 && !is_stopped_) {
const int64_t now = ObSysTime::now(ObSysTime::Monotonic).toMicroSeconds();
if (REACH_TIME_INTERVAL(DUMP_INTERVAL)) {
dump_info();
}
const int64_t now = ObSysTime::now().toMicroSeconds();
TaskToken *first_token = priority_task_queue_.at(0);
abort_unless(nullptr != first_token);
if (first_token->scheduled_time_ <= now) {
@ -539,7 +545,9 @@ void ObTimerService::run1()
OB_LOG(WARN, "pop TaskToken from priority_task_queue failed", K_(tenant_id), K(ret));
} else if (nullptr == token) {
// wait for a schedulable task
int64_t wait_time = st > 0 ? (st - now) : WAIT_INTERVAL_US;
int64_t wait_time = st - now;
wait_time = MIN(wait_time, MAX_WAIT_INTERVAL);
wait_time = MAX(wait_time, MIN_WAIT_INTERVAL);
monitor_.timed_wait(ObSysTime(wait_time));
} else {
VecIter it = nullptr;
@ -638,5 +646,15 @@ void ObTimerService::delete_token(TaskToken *&token)
token_alloc_.free(token);
}
void ObTimerService::dump_info()
{
OB_LOG(INFO, "dump info [summary]",
KP(this), KPC(this));
for (int idx = 0; idx < priority_task_queue_.size(); ++idx) {
TaskToken *token = priority_task_queue_.at(idx);
OB_LOG(INFO, "dump queue token", KP(this), KPC(token));
}
}
}
}
}

17
deps/oblib/src/lib/task/ob_timer_service.h vendored
View File

@ -44,7 +44,7 @@ public:
{
int64_t pos = 0;
if (NULL != buf && buf_len > 0) {
databuff_printf(buf, buf_len, pos, "tasktype:%s, timeout_check:%s",
databuff_printf(buf, buf_len, pos, "task_type:%s, timeout_check:%s",
typeid(*this).name(), timeout_check_ ? "True" : "False");
}
return pos;
@ -69,8 +69,9 @@ public:
TaskToken(const TaskToken &other) = delete;
TaskToken &operator=(const TaskToken &other) = delete;
~TaskToken();
TO_STRING_KV(KP_(timer), KPC_(timer), KP_(task), KPC_(task), K_(scheduled_time), K_(delay));
TO_STRING_KV(KP(this), KP_(timer), KP_(task), K_(task_type), K_(scheduled_time), K_(delay));
public:
char task_type_[128];
const ObTimer *timer_;
ObTimerTask *task_;
int64_t scheduled_time_;
@ -107,6 +108,11 @@ public:
}
ObTimerService(const ObTimerService &) = delete;
ObTimerService &operator=(const ObTimerService &) = delete;
TO_STRING_KV(KP(this), K(tenant_id_),
K(priority_task_queue_.size()),
K(running_task_set_.size()),
K(uncanceled_task_set_.size()),
K(worker_thread_pool_.get_queue_num()));
int start();
void stop();
void wait();
@ -149,7 +155,7 @@ private:
const int64_t st,
const int64_t dt);
void delete_token(TaskToken *&token);
void dump_info();
private:
bool is_never_started_;
bool is_stopped_;
@ -162,13 +168,14 @@ private:
ObTimerTaskThreadPool worker_thread_pool_;
lib::ObMutex mutex_;
private:
static constexpr int64_t WAIT_INTERVAL_US = 10L * 1000L; // 10ms
static constexpr int64_t MIN_WAIT_INTERVAL = 10L * 1000L; // 10ms
static constexpr int64_t MAX_WAIT_INTERVAL = 100L * 1000L; // 100ms
static constexpr int64_t MIN_WORKER_THREAD_NUM = 4L;
static constexpr int64_t MAX_WORKER_THREAD_NUM = 128L;
static constexpr int64_t TASK_NUM_LIMIT = 10000L;
static constexpr int64_t CLOCK_SKEW_DELTA = 20L * 1000L; // 20ms
static constexpr int64_t CLOCK_ERROR_DELTA = 500L * 1000L; // 500ms
static constexpr int64_t DUMP_INTERVAL_US = 600L * 1000L * 1000L; // 10min
static constexpr int64_t DUMP_INTERVAL = 60L * 1000L * 1000L; // 60s
using VecIter = ObSortedVector<TaskToken *>::iterator;
};

16
deps/oblib/src/lib/thread/ob_dynamic_thread_pool.cpp vendored
View File

@ -434,6 +434,16 @@ int ObSimpleDynamicThreadPool::set_max_thread_count(int64_t max_thread_cnt)
return ret;
}
int ObSimpleDynamicThreadPool::set_thread_count_and_try_recycle(int64_t cnt)
{
int ret = OB_SUCCESS;
ret = Threads::set_thread_count(cnt);
if (OB_SUCC(ret)) {
ret = Threads::try_thread_recycle();
}
return ret;
}
void ObSimpleDynamicThreadPool::try_expand_thread_count()
{
int ret = OB_SUCCESS;
@ -462,9 +472,9 @@ void ObSimpleDynamicThreadPool::try_expand_thread_count()
lib::Threads::get_expect_run_wrapper() = NULL;
DEFER(lib::Threads::get_expect_run_wrapper() = run_wrapper);
ObResetThreadTenantIdGuard guard;
ret = Threads::set_thread_count(cur_thread_count + inc_cnt);
ret = set_thread_count_and_try_recycle(cur_thread_count + inc_cnt);
} else {
ret = Threads::set_thread_count(cur_thread_count + inc_cnt);
ret = set_thread_count_and_try_recycle(cur_thread_count + inc_cnt);
}
if (OB_FAIL(ret)) {
COMMON_LOG(ERROR, "set thread count failed", KP(this), K(cur_thread_count), K(inc_cnt));
@ -487,7 +497,7 @@ void ObSimpleDynamicThreadPool::try_inc_thread_count(int64_t cnt)
new_thread_count = min(new_thread_count, max_thread_cnt_);
COMMON_LOG(INFO, "try inc thread count", K(*this), K(cur_thread_count), K(cnt), K(new_thread_count));
if (new_thread_count != cur_thread_count) {
if (OB_FAIL(Threads::set_thread_count(new_thread_count))) {
if (OB_FAIL(set_thread_count_and_try_recycle(new_thread_count))) {
COMMON_LOG(ERROR, "set thread count failed", K(*this), K(cur_thread_count), K(cnt), K(new_thread_count));
} else {
COMMON_LOG(INFO, "inc thread count", K(*this), K(cur_thread_count), K(cnt), K(new_thread_count));

1
deps/oblib/src/lib/thread/ob_dynamic_thread_pool.h vendored
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@ -124,6 +124,7 @@ protected:
{
return ATOMIC_AAF(&running_thread_cnt_, cnt);
}
int set_thread_count_and_try_recycle(int64_t cnt);
private:
int64_t min_thread_cnt_;
int64_t max_thread_cnt_;

2
deps/oblib/src/lib/thread/thread.h vendored
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@ -66,6 +66,7 @@ public:
void destroy();
void dump_pth();
pthread_t get_pthread() { return pth_; }
int try_wait();
/// \brief Get current thread object.
///
@ -172,7 +173,6 @@ public:
static thread_local uint8_t wait_event_;
private:
static void* __th_start(void *th);
int try_wait();
void destroy_stack();
static thread_local Thread* current_thread_;

62
deps/oblib/src/lib/thread/threads.cpp vendored
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@ -41,7 +41,7 @@ Threads::~Threads()
destroy();
}
int Threads::do_set_thread_count(int64_t n_threads)
int Threads::do_set_thread_count(int64_t n_threads, bool async_recycle)
{
int ret = OB_SUCCESS;
if (!stop_) {
@ -51,13 +51,17 @@ int Threads::do_set_thread_count(int64_t n_threads)
}
for (auto i = n_threads; i < n_threads_; i++) {
auto thread = threads_[i];
thread->wait();
thread->destroy();
thread->~Thread();
ob_free(thread);
threads_[i] = nullptr;
if (!async_recycle) {
thread->wait();
thread->destroy();
thread->~Thread();
ob_free(thread);
threads_[i] = nullptr;
}
}
if (!async_recycle) {
n_threads_ = n_threads;
}
n_threads_ = n_threads;
} else if (n_threads == n_threads_) {
} else {
auto new_threads = reinterpret_cast<Thread**>(
@ -100,7 +104,7 @@ int Threads::do_set_thread_count(int64_t n_threads)
int Threads::set_thread_count(int64_t n_threads)
{
common::SpinWLockGuard g(lock_);
return do_set_thread_count(n_threads);
return do_set_thread_count(n_threads, false);
}
int Threads::inc_thread_count(int64_t inc)
@ -116,22 +120,48 @@ int Threads::thread_recycle()
// idle defination: not working for more than N minutes
common::SpinWLockGuard g(lock_);
// int target = 10; // leave at most 10 threads as cached thread
return do_thread_recycle();
return do_thread_recycle(false);
}
int Threads::do_thread_recycle()
int Threads::try_thread_recycle()
{
common::SpinWLockGuard g(lock_);
return do_thread_recycle(true);
}
int Threads::do_thread_recycle(bool try_mode)
{
int ret = OB_SUCCESS;
int n_threads = n_threads_;
// destroy all stopped threads
// px threads mark itself as stopped when it is idle for more than 10 minutes.
for (int i = 0; i < n_threads_; i++) {
for (int i = 0; OB_SUCC(ret) && i < n_threads_; i++) {
if (nullptr != threads_[i]) {
bool need_destroy = false;
if (threads_[i]->has_set_stop()) {
destroy_thread(threads_[i]);
threads_[i] = nullptr;
n_threads--;
LOG_INFO("recycle one thread", "total", n_threads_, "remain", n_threads);
if (try_mode) {
if (OB_FAIL(threads_[i]->try_wait())) {
if (OB_EAGAIN == ret) {
ret = OB_SUCCESS;
LOG_INFO("try_wait return eagain", KP(this), "thread", threads_[i]);
} else {
LOG_ERROR("try_wait failed", K(ret), KP(this));
}
} else {
need_destroy = true;
}
} else {
threads_[i]->wait();
need_destroy = true;
}
if (OB_SUCC(ret) && need_destroy) {
threads_[i]->destroy();
threads_[i]->~Thread();
ob_free(threads_[i]);
threads_[i] = nullptr;
n_threads--;
LOG_INFO("recycle one thread", KP(this), "total", n_threads_, "remain", n_threads);
}
}
}
}
@ -281,4 +311,4 @@ int ObPThread::try_wait()
}
}
return ret;
}
}

5
deps/oblib/src/lib/thread/threads.h vendored
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@ -55,10 +55,11 @@ public:
/// adjust to that number, i.e. there are such exact number
/// of threads are running if it has started, or would run
/// after call \c start() function.
int do_set_thread_count(int64_t n_threads);
int do_set_thread_count(int64_t n_threads, bool async_recycle=false);
int set_thread_count(int64_t n_threads);
int inc_thread_count(int64_t inc = 1);
int thread_recycle();
int try_thread_recycle();
int init();
// IRunWrapper 用于创建多租户线程时指定租户上下文
@ -111,7 +112,7 @@ protected:
private:
virtual void run1() {}
int do_thread_recycle();
int do_thread_recycle(bool try_mode);
/// \brief Create thread
int create_thread(Thread *&thread, int64_t idx);

2
deps/oblib/unittest/lib/thread/test_simple_thread_pool.cpp vendored
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@ -76,7 +76,7 @@ TEST(DISABLED_TestSimpleThreadPool, Basic)
}
TEST(TestSimpleThreadPool, test_dynamic_simple_thread_pool)
TEST(TestSimpleThreadPool, DISABLED_test_dynamic_simple_thread_pool)
{
class ObTestSimpleThreadPool : public ObSimpleThreadPool {
void handle(void *task) {