1564 lines
43 KiB
C++
1564 lines
43 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: ThreadPool.cpp
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Date: 2021-10-30
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "Async.hpp"
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#include "ThreadPool.hpp"
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#include "AsyncApp.hpp"
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#include "WorkItem.hpp"
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#include "Schedular.hpp"
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#include "ThreadWorkerQueueShim.hpp"
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namespace Aurora::Async
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{
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//STATIC_TLS(WorkerId_t, tlsWorkerId);
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static thread_local AuWPtr<ThreadPool> gCurrentPool;
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static const auto kMagicResortThreshold = 15;
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static thread_local int tlsCallStack;
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inline auto GetWorkerInternal(const AuSPtr<IThreadPool> &pool)
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{
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if (pool.get() == AuStaticCast<IAsyncApp>(gAsyncApp))
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{
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return AuUnsafeRaiiToShared(AuStaticCast<ThreadPool>(gAsyncApp));
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}
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return AuStaticPointerCast<ThreadPool>(pool);
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}
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AUKN_SYM WorkerPId_t GetCurrentWorkerPId()
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{
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auto lkPool = gCurrentPool.lock();
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if (!lkPool) return {};
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auto cpy = *lkPool->tlsWorkerId;
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auto lkPool2 = cpy.pool.lock();
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return WorkerPId_t(lkPool, cpy);
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}
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//
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ThreadPool::ThreadPool()
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{
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this->rwlock_ = AuThreadPrimitives::RWLockUnique();
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SysAssert(static_cast<bool>(this->rwlock_), "Couldn't initialize ThreadPool. Unable to allocate an RWLock");
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}
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// internal pool interface
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bool ThreadPool::WaitFor(WorkerId_t unlocker, const AuSPtr<Threading::IWaitable> &primitive, AuUInt32 timeoutMs)
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{
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return WaitFor(WorkerPId_t { AuAsync::GetCurrentWorkerPId().pool, unlocker }, primitive, timeoutMs);
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}
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bool ThreadPool::WaitFor(WorkerPId_t unlocker, const AuSPtr<Threading::IWaitable> &primitive, AuUInt32 timeoutMs)
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{
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auto curThread = GetThreadState();
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if (!curThread)
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{
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return Threading::WaitFor(primitive.get(), timeoutMs);
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}
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bool workerIdMatches = (unlocker.second == curThread->id.second) || ((unlocker.second == Async::kThreadIdAny) && (GetThreadWorkersCount(unlocker.first) == 1));
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if ((unlocker.first == curThread->id.first) &&
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(unlocker.pool.get() == this) && // work group matches
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(workerIdMatches)) // well, crap
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{
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bool queryAsync = false;
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while (!(queryAsync ? primitive->TryLock() : Threading::WaitFor(primitive.get(), 2)))
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{
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queryAsync = CtxYield();
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if (!queryAsync && this->shuttingdown_)
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{
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return false;
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}
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}
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return true;
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}
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else
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{
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AuSPtr<ThreadState> pHandle;
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{
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AU_LOCK_GUARD(AuStaticCast<ThreadPool>(unlocker.pool)->rwlock_->AsReadable());
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if (pHandle = AuStaticCast<ThreadPool>(unlocker.pool)->GetThreadHandle(unlocker))
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{
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AU_LOCK_GUARD(pHandle->externalFencesLock);
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if (pHandle->exitingflag2)
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{
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return primitive->TryLock();
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}
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else
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{
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pHandle->externalFences.push_back(primitive.get());
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}
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}
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else if (unlocker.pool.get() == this)
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{
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return primitive->TryLock();
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}
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}
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bool bRet = Threading::WaitFor(primitive.get(), timeoutMs);
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if (pHandle)
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{
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AU_LOCK_GUARD(pHandle->externalFencesLock);
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AuTryRemove(pHandle->externalFences, primitive.get());
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}
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return bRet;
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}
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}
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void ThreadPool::Run(WorkerId_t target, AuSPtr<IAsyncRunnable> runnable)
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{
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auto state = GetGroup(target.first);
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SysAssert(static_cast<bool>(state), "couldn't dispatch a task to an offline group");
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IncrementTasksRunning();
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{
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AU_LOCK_GUARD(state->cvWorkMutex);
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#if defined(STAGING) || defined(DEBUG)
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AU_LOCK_GUARD(rwlock_->AsReadable());
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if (target.second != Async::kThreadIdAny)
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{
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auto itr = state->workers.find(target.second);
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if ((itr == state->workers.end()) || (itr->second->rejecting))
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{
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SysPushErrorGeneric("worker: {}:{} is offline", target.first, target.second);
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DecrementTasksRunning();
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#if 0
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throw "Requested job worker is offline";
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#else
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runnable->CancelAsync();
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return;
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#endif
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}
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}
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else
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{
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auto workers = state->workers;
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bool found = false;
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for (const auto &worker : state->workers)
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{
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if (!worker.second->rejecting)
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{
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found = true;
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break;
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}
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}
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if (!found)
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{
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DecrementTasksRunning();
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#if 0
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throw "No workers available";
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#else
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runnable->CancelAsync();
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return;
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#endif
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}
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}
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#endif
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if (!AuTryInsert(state->workQueue, AuMakePair(target.second, runnable)))
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{
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DecrementTasksRunning();
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runnable->CancelAsync();
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return;
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}
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state->dirty++;
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if (state->dirty > kMagicResortThreshold)
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{
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state->dirty = 0;
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state->sorted = false;
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}
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state->eventLs->Set();
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}
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if (target.second == Async::kThreadIdAny)
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{
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state->cvVariable->Signal();
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}
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else
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{
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// sad :(
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// TODO: when we have wait any, add support (^ the trigger) for it here
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state->cvVariable->Broadcast();
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}
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}
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IThreadPool *ThreadPool::ToThreadPool()
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{
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return this;
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}
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void ThreadPool::IncrementTasksRunning()
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{
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this->tasksRunning_++;
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}
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void ThreadPool::DecrementTasksRunning()
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{
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if ((--this->tasksRunning_) == 0)
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{
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if (InRunnerMode())
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{
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Shutdown();
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}
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}
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}
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// ithreadpool
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size_t ThreadPool::GetThreadWorkersCount(ThreadGroup_t group)
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{
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AU_LOCK_GUARD(this->rwlock_->AsReadable());
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return GetGroup(group)->workers.size();
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}
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void ThreadPool::SetRunningMode(bool eventRunning)
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{
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this->runnersRunning_ = eventRunning;
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}
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bool ThreadPool::Spawn(WorkerId_t workerId)
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{
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return Spawn(workerId, false);
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}
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bool ThreadPool::Create(WorkerId_t workerId)
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{
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return Spawn(workerId, true);
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}
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bool ThreadPool::InRunnerMode()
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{
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return this->runnersRunning_;
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}
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bool ThreadPool::Poll()
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{
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AuUInt32 uCount {};
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return InternalRunOne(false, uCount);
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}
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bool ThreadPool::RunOnce()
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{
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AuUInt32 uCount {};
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return InternalRunOne(true, uCount);
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}
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bool ThreadPool::Run()
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{
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bool ranOnce {};
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gCurrentPool = AuWeakFromThis();
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auto auThread = AuThreads::GetThread();
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auto job = GetThreadState();
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if (!job)
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{
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SysPushErrorUninitialized("Not an async thread");
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}
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while ((!auThread->Exiting()) &&
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(!this->shutdown) &&
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(!job->bBreakEarly))
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{
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AuUInt32 uCount {};
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// Do work (blocking)
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if (!InternalRunOne(true, uCount))
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{
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if (this->shutdown)
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{
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return ranOnce;
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}
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}
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ranOnce = true;
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}
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return ranOnce;
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}
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bool ThreadPool::InternalRunOne(bool block, AuUInt32 &uCount)
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{
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auto state = GetThreadState();
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if (!state)
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{
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SysPushErrorUninitialized("Not an async thread");
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}
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bool success {};
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auto runMode = GetCurrentThreadRunMode();
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EarlyExitTick();
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//do
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{
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auto asyncLoop = state->asyncLoop;
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asyncLoop->OnFrame();
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if (asyncLoop->GetSourceCount() > 1)
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{
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bool bShouldTrySleepForKernel {};
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if (runMode == ERunMode::eLowLatencyFreqKernel)
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{
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if (state->rateLimiter.CheckExchangePass())
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{
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#if defined(AURORA_PLATFORM_WIN32)
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bShouldTrySleepForKernel = asyncLoop->PumpNonblocking();
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#else
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bShouldTrySleepForKernel = asyncLoop->IsSignaledPeek();
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#endif
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}
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else
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{
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if (!PollInternal(false, uCount))
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{
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AuThreading::ContextYield();
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}
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else
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{
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success = true;
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}
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}
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}
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else if (runMode == ERunMode::eLowLatencyYield)
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{
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AuThreading::ContextYield();
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block = false;
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#if defined(AURORA_PLATFORM_WIN32)
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bShouldTrySleepForKernel = asyncLoop->PumpNonblocking();
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#else
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bShouldTrySleepForKernel = asyncLoop->IsSignaledPeek();
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#endif
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}
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else if (runMode == ERunMode::eEfficient)
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{
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bShouldTrySleepForKernel = block;
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if (!block)
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{
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bShouldTrySleepForKernel = asyncLoop->IsSignaledPeek();
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}
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}
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if (bShouldTrySleepForKernel
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// epoll and such like can be checked without read success. kevent works on availablity, not scheduling read like iosubmit
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// allow windows to atomically pump instead of wasting time buffering the primitives state
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&& ((AuBuild::kIsNtDerived && runMode == ERunMode::eEfficient) ||
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(!AuBuild::kIsNtDerived))
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&& (asyncLoop->WaitAny(0))
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)
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{
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success = PollInternal(false, uCount);
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}
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else
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{
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success |= PollInternal(false, uCount);
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}
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}
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else
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{
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success = PollInternal(block, uCount);
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}
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} //while (success);
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EarlyExitTick();
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return success;
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}
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bool ThreadPool::PollInternal(bool block, AuUInt32 &uCount)
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{
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auto state = GetThreadState();
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if (!state)
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{
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SysPushErrorUninitialized("Not an async thread");
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}
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auto group = state->parent.lock();
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//state->pendingWorkItems.clear();
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auto magic = CtxPollPush();
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{
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AU_LOCK_GUARD(group->cvWorkMutex);
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// TODO: reimplement this
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// this is stupid and gross
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if (group->workQueue.size() > group->workers.size()*3)
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{
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if (!group->sorted)
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{
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auto cpy = group->workQueue;
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std::sort(group->workQueue.begin(), group->workQueue.end(), [&](const WorkEntry_t &a, const WorkEntry_t &b)
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{
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if (a.second->GetPrio() != b.second->GetPrio())
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return a.second->GetPrio() > b.second->GetPrio();
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AuUInt32 ia {}, ib {};
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for (; ia < cpy.size(); ia++)
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if (cpy[ia].second == a.second)
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break;
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for (; ib < cpy.size(); ib++)
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if (cpy[ib].second == b.second)
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break;
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return ia < ib;
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});
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group->sorted = true;
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group->dirty = 0;
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}
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}
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do
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{
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// Deque tasks the current thread runner could dipatch
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// Noting that `multipopCount` determines how aggressive threads are in dequeuing work
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// It's probable `multipopCount` will equal 1 for your use case
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//
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// Only increment when you know tasks within a group queue will not depend on one another
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// *and* tasks require a small amount of execution time
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//
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// This could be potentially useful for an event dispatcher whereby you're dispatching
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// hundreds of items per second, across a thread or two, knowing dequeuing one instead of all
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// is a waste of CPU cycles.
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//
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// Remember, incrementing `multipopCount` is potentially dangerous the second you have local
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// thread group waits
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for (auto itr = group->workQueue.begin();
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((itr != group->workQueue.end()) &&
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(state->pendingWorkItems.size() < state->multipopCount));
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)
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{
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// TODO: catch low memory condition
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if (itr->first == Async::kThreadIdAny)
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{
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state->pendingWorkItems.push_back(*itr);
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itr = group->workQueue.erase(itr);
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continue;
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}
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if ((itr->first != Async::kThreadIdAny) && (itr->first == state->id.second))
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{
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state->pendingWorkItems.push_back(*itr);
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itr = group->workQueue.erase(itr);
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continue;
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}
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itr++;
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}
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// Consider blocking for more work
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if (!block)
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{
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break;
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}
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// pre-wakeup thread terminating check
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if (state->threadObject->Exiting())
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{
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break;
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}
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// Block if no work items are present
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if (state->pendingWorkItems.empty())
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{
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if (this->shuttingdown_)
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{
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//this->EarlyExitTick();
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break;
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}
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group->cvVariable->WaitForSignal();
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if (this->shuttingdown_)
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{
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//this->EarlyExitTick();
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break;
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}
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}
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// Post-wakeup thread terminating check
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if (state->threadObject->Exiting())
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{
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break;
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}
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if (state->pendingWorkItems.empty() && (
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(this->GetThreadState()->asyncLoop->GetSourceCount() > 1) ||
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this->GetThreadState()->asyncLoop->CommitPending())) //(this->ToKernelWorkQueue()->IsSignaledPeek()))
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{
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return false;
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}
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} while (state->pendingWorkItems.empty() && block);
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if (group->workQueue.empty())
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{
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group->eventLs->Reset();
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}
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}
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if (state->pendingWorkItems.empty())
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{
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CtxPollReturn(state, magic, false);
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return false;
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}
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int runningTasks {};
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auto oldTlsHandle = AuExchange(gCurrentPool, AuSharedFromThis());
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bool lowPrioCont {};
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bool lowPrioContCached {};
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state->cookie++;
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int start = state->cookie;
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// Account for
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// while (AuAsync.GetCurrentPool()->runForever());
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// in the first task (or deeper)
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if (InRunnerMode() && tlsCallStack) // are we one call deep?
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{
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auto queue = ToKernelWorkQueue();
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if ((this->tasksRunning_ == tlsCallStack) &&
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(!queue || queue->GetSourceCount() <= 1))
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{
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return false;
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}
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}
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//
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for (auto itr = state->pendingWorkItems.begin(); itr != state->pendingWorkItems.end(); )
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{
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if (state->threadObject->Exiting() || this->shutdown)
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{
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break;
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}
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// Set the last frame time for a watchdog later down the line
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state->lastFrameTime = Time::CurrentClockMS();
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if (itr->second->GetPrio() < 0.25)
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{
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group->sorted = false;
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if (lowPrioCont)
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{
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itr++;
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continue;
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}
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if (!lowPrioContCached)
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{
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AU_LOCK_GUARD(group->cvWorkMutex);
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{
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for (const auto &[pendingWorkA, pendingWorkB] : group->workQueue)
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{
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if (pendingWorkB->GetPrio() > .5)
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{
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lowPrioCont = true;
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break;
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}
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}
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}
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lowPrioContCached = true;
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if (lowPrioCont)
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{
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itr++;
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continue;
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}
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}
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}
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// Dispatch
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auto oops = itr->second;
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|
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// Remove from our local job queue
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itr = state->pendingWorkItems.erase(itr);
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tlsCallStack++;
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|
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//SysBenchmark(fmt::format("RunAsync: {}", block));
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// Dispatch
|
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oops->RunAsync();
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uCount++;
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|
|
// Atomically decrement global task counter
|
|
runningTasks = this->tasksRunning_.fetch_sub(1) - 1;
|
|
|
|
tlsCallStack--;
|
|
|
|
if (start != state->cookie)
|
|
{
|
|
start = state->cookie;
|
|
itr = state->pendingWorkItems.begin();
|
|
}
|
|
}
|
|
|
|
gCurrentPool = oldTlsHandle;
|
|
|
|
// Return popped work back to the groups work pool when our -pump loops were preempted
|
|
if (state->pendingWorkItems.size())
|
|
{
|
|
AU_LOCK_GUARD(group->cvWorkMutex);
|
|
// TODO: low memory condition slow path
|
|
group->workQueue.insert(group->workQueue.end(), state->pendingWorkItems.begin(), state->pendingWorkItems.end());
|
|
group->eventLs->Set();
|
|
state->pendingWorkItems.clear();
|
|
}
|
|
|
|
CtxPollReturn(state, magic, true);
|
|
|
|
|
|
// Account for
|
|
// while (AuAsync.GetCurrentPool()->runForever());
|
|
// in the top most task
|
|
if (InRunnerMode())
|
|
{
|
|
auto queue = ToKernelWorkQueue();
|
|
|
|
if ((runningTasks == 0) &&
|
|
(this->tasksRunning_ == 0 ) &&
|
|
(!queue || queue->GetSourceCount() <= 1))
|
|
{
|
|
Shutdown();
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void ThreadPool::Shutdown()
|
|
{
|
|
auto trySelfPid = AuAsync::GetCurrentWorkerPId();
|
|
|
|
// Update shutting down flag
|
|
// Specify the root-level shutdown flag for 'ok, u can work, but you're shutting down soon [microseconds, probably]'
|
|
{
|
|
if (AuAtomicTestAndSet(&this->shuttingdown_, 0) != 0)
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
|
|
auto pLocalRunner = this->GetThreadStateNoWarn();
|
|
|
|
AuList<WorkerId_t> toBarrier;
|
|
// Noting
|
|
// 1) that StopSched may lockup under a writable lock
|
|
// -> we will terminate a thread that may be dispatching a sys pump event
|
|
// 2) that barrier doesn't need to be under a write lock
|
|
//
|
|
// Perform the following shutdown of the schedular and other available threads under a read lock
|
|
{
|
|
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
StopSched();
|
|
|
|
for (auto &[groupId, group] : this->threads_)
|
|
{
|
|
for (auto &[id, worker] : group->workers)
|
|
{
|
|
if (trySelfPid == worker->id)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
toBarrier.push_back(worker->id);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Ehhhh
|
|
// We need this fix to a specific V8 deinit lockup
|
|
//this->Poll();
|
|
|
|
for (const auto &id : toBarrier)
|
|
{
|
|
if (trySelfPid == id)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
this->Barrier(id, 0, false, false /* no reject*/); // absolute safest point in shutdown; sync to already submitted work
|
|
}
|
|
}
|
|
|
|
// Time for fuckiness
|
|
|
|
// Specify the root-level shutdown flag for 'ok, u can work, but you're shutting down after sync barrier'
|
|
{
|
|
AuAtomicTestAndSet(&this->shuttingdown_, 1);
|
|
}
|
|
|
|
// Finally set the shutdown flag on all of our thread contexts
|
|
// then release them from the runners/workers list
|
|
// then release all group contexts
|
|
AuList<AuThreads::ThreadShared_t> threads;
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsWritable());
|
|
|
|
for (auto &[groupId, group] : this->threads_)
|
|
{
|
|
for (auto &[id, worker] : group->workers)
|
|
{
|
|
if (group->cvWorkMutex && group->cvVariable)
|
|
{
|
|
bool bLocked = group->cvWorkMutex->TryLock();
|
|
worker->shuttingdown = true;
|
|
group->cvVariable->Broadcast();
|
|
if (bLocked) group->cvWorkMutex->Unlock();
|
|
}
|
|
else
|
|
{
|
|
worker->shuttingdown = true;
|
|
}
|
|
|
|
if (!group->IsSysThread()) // bug?
|
|
{
|
|
worker->threadObject->SendExitSignal();
|
|
threads.push_back(worker->threadObject);
|
|
}
|
|
|
|
auto &event = worker->running;
|
|
if (event)
|
|
{
|
|
event->Set();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Final sync to exit
|
|
{
|
|
for (const auto &id : toBarrier)
|
|
{
|
|
if (trySelfPid == id)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
auto handle = this->GetThreadHandle(id);
|
|
if (handle)
|
|
{
|
|
handle->rejecting = false;
|
|
}
|
|
this->Barrier(id, 0, false, true);
|
|
}
|
|
}
|
|
|
|
// Sync to shutdown threads to prevent a race condition whereby the async subsystem shuts down before the threads
|
|
for (const auto &thread : threads)
|
|
{
|
|
thread->Exit();
|
|
}
|
|
|
|
// Is dead flag
|
|
this->shutdown = true;
|
|
|
|
if (pLocalRunner)
|
|
{
|
|
pLocalRunner->bIsKiller = true;
|
|
}
|
|
}
|
|
|
|
bool ThreadPool::Exiting()
|
|
{
|
|
return this->shuttingdown_ ||
|
|
GetThreadState()->exiting;
|
|
}
|
|
|
|
AuUInt32 ThreadPool::PollAndCount(bool bStrict)
|
|
{
|
|
AuUInt32 uCount {};
|
|
auto bRanAtLeastOne = this->InternalRunOne(false, uCount);
|
|
return uCount ? uCount : (bStrict ? bRanAtLeastOne : 0);
|
|
}
|
|
|
|
AuUInt32 ThreadPool::RunAllPending()
|
|
{
|
|
AuUInt32 uCount {};
|
|
bool ranAtLeastOne {};
|
|
|
|
do
|
|
{
|
|
uCount = 0;
|
|
ranAtLeastOne |= this->InternalRunOne(false, uCount);
|
|
}
|
|
while (uCount);
|
|
|
|
return uCount ? uCount : false;
|
|
}
|
|
|
|
AuSPtr<IWorkItem> ThreadPool::NewWorkItem(const WorkerId_t &worker,
|
|
const AuSPtr<IWorkItemHandler> &task,
|
|
bool bSupportsBlocking)
|
|
{
|
|
// Error pass-through
|
|
if (!task)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
return AuMakeShared<WorkItem>(this, WorkerPId_t { AuAsync::GetCurrentWorkerPId().pool, worker }, task, bSupportsBlocking);
|
|
}
|
|
|
|
AuSPtr<IWorkItem> ThreadPool::NewFence()
|
|
{
|
|
return AuMakeShared<WorkItem>(this, AuAsync::GetCurrentWorkerPId(), AuSPtr<IWorkItemHandler>{}, true);
|
|
}
|
|
|
|
AuThreads::ThreadShared_t ThreadPool::ResolveHandle(WorkerId_t id)
|
|
{
|
|
auto pState = GetThreadHandle(id);
|
|
if (!pState)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
return pState->threadObject;
|
|
}
|
|
|
|
AuBST<ThreadGroup_t, AuList<ThreadId_t>> ThreadPool::GetThreads()
|
|
{
|
|
AU_LOCK_GUARD(rwlock_->AsReadable());
|
|
|
|
AuBST<ThreadGroup_t, AuList<ThreadId_t>> ret;
|
|
|
|
for (const auto &group : this->threads_)
|
|
{
|
|
AuList<ThreadId_t> workers;
|
|
|
|
AuTryReserve(workers, group.second->workers.size());
|
|
|
|
for (const auto &thread : group.second->workers)
|
|
{
|
|
workers.push_back(thread.second->id.second);
|
|
}
|
|
|
|
ret[group.first] = workers;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
WorkerId_t ThreadPool::GetCurrentThread()
|
|
{
|
|
return tlsWorkerId;
|
|
}
|
|
|
|
bool ThreadPool::Sync(WorkerId_t workerId, AuUInt32 timeoutMs, bool requireSignal)
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
auto group = GetGroup(workerId.first);
|
|
auto currentWorkerId = GetCurrentThread().second;
|
|
|
|
if (workerId.second == Async::kThreadIdAny)
|
|
{
|
|
for (auto &jobWorker : group->workers)
|
|
{
|
|
if (!Barrier(jobWorker.second->id, timeoutMs, requireSignal && jobWorker.second->id.second != currentWorkerId, false)) // BAD!, should subtract time elapsed, clamp to, i dunno, 5ms min?
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return Barrier(workerId, timeoutMs, requireSignal && workerId.second != currentWorkerId, false);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void ThreadPool::Signal(WorkerId_t workerId)
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
auto group = GetGroup(workerId.first);
|
|
if (workerId.second == Async::kThreadIdAny)
|
|
{
|
|
for (auto &jobWorker : group->workers)
|
|
{
|
|
jobWorker.second->running->Set();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
GetThreadHandle(workerId)->running->Set();
|
|
}
|
|
}
|
|
|
|
AuSPtr<AuLoop::ILoopSource> ThreadPool::WorkerToLoopSource(WorkerId_t workerId)
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
auto a = GetThreadHandle(workerId);
|
|
if (!a)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
return a->parent.lock()->asyncLoopSourceShared;
|
|
}
|
|
|
|
void ThreadPool::SyncAllSafe()
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
for (const auto &re : this->threads_)
|
|
{
|
|
for (auto &jobWorker : re.second->workers)
|
|
{
|
|
SysAssert(Barrier(jobWorker.second->id, 0, false, false));
|
|
}
|
|
}
|
|
}
|
|
|
|
void ThreadPool::AddFeature(WorkerId_t id,
|
|
AuSPtr<AuThreads::IThreadFeature> pFeature,
|
|
bool bNonBlock)
|
|
{
|
|
auto work = AuMakeSharedThrow<BasicWorkStdFunc>(([=]()
|
|
{
|
|
GetThreadState()->features.push_back(pFeature);
|
|
pFeature->Init();
|
|
}));
|
|
|
|
auto pWorkItem = this->NewWorkItem(id, work, !bNonBlock)->Dispatch();
|
|
SysAssert(pWorkItem);
|
|
|
|
if (!bNonBlock)
|
|
{
|
|
pWorkItem->BlockUntilComplete();
|
|
}
|
|
}
|
|
|
|
void ThreadPool::AssertInThreadGroup(ThreadGroup_t group)
|
|
{
|
|
SysAssert(static_cast<WorkerId_t>(tlsWorkerId).first == group);
|
|
}
|
|
|
|
void ThreadPool::AssertWorker(WorkerId_t id)
|
|
{
|
|
SysAssert(static_cast<WorkerId_t>(tlsWorkerId) == id);
|
|
}
|
|
|
|
AuSPtr<AuLoop::ILoopQueue> ThreadPool::ToKernelWorkQueue()
|
|
{
|
|
return this->GetThreadState()->asyncLoop;
|
|
}
|
|
|
|
AuSPtr<AuLoop::ILoopQueue> ThreadPool::ToKernelWorkQueue(WorkerId_t workerId)
|
|
{
|
|
auto worker = this->GetThreadHandle(workerId);
|
|
if (!worker)
|
|
{
|
|
SysPushErrorGeneric("Couldn't find requested worker");
|
|
return {};
|
|
}
|
|
return worker->asyncLoop;
|
|
}
|
|
|
|
void ThreadPool::UpdateWorkMode(WorkerId_t workerId, RunMode mode)
|
|
{
|
|
auto states = this->GetThreadHandles(workerId);
|
|
if (!states.size())
|
|
{
|
|
SysPushErrorGeneric("Couldn't find requested worker");
|
|
return;
|
|
}
|
|
|
|
for (const auto &state : states)
|
|
{
|
|
state->runMode = mode.mode;
|
|
if (mode.freqMsTick)
|
|
{
|
|
state->rateLimiter.SetNextStep(mode.freqMsTick * 1'000'000);
|
|
}
|
|
}
|
|
}
|
|
|
|
ERunMode ThreadPool::GetCurrentThreadRunMode()
|
|
{
|
|
auto state = this->GetThreadState();
|
|
if (!state)
|
|
{
|
|
return ERunMode::eEfficient;
|
|
}
|
|
return state->runMode;
|
|
}
|
|
|
|
ERunMode ThreadPool::GetThreadRunMode(WorkerId_t workerId)
|
|
{
|
|
auto worker = this->GetThreadHandle(workerId);
|
|
if (!worker)
|
|
{
|
|
SysPushErrorGeneric("Couldn't find requested worker");
|
|
return {};
|
|
}
|
|
return worker->runMode;
|
|
}
|
|
|
|
// Unimplemented fiber hooks, 'twas used for science
|
|
|
|
int ThreadPool::CtxPollPush()
|
|
{
|
|
// TOOD (Reece): implement a context switching library
|
|
// Refer to the old implementation of this on pastebin
|
|
return 0;
|
|
}
|
|
|
|
void ThreadPool::CtxPollReturn(const AuSPtr<ThreadState> &state, int status, bool hitTask)
|
|
{
|
|
}
|
|
|
|
bool ThreadPool::CtxYield()
|
|
{
|
|
bool ranAtLeastOne = false;
|
|
|
|
// !!!
|
|
|
|
if (this->shutdown ||
|
|
this->shuttingdown_ & 2) // fast
|
|
{
|
|
if (GetThreadState()->rejecting)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
return this->InternalRunOne(false, uCount);
|
|
#else
|
|
AuUInt32 uCount {};
|
|
do
|
|
{
|
|
uCount = 0;
|
|
ranAtLeastOne |= this->InternalRunOne(false, uCount);
|
|
}
|
|
while (uCount);
|
|
|
|
return uCount || ranAtLeastOne;
|
|
#endif
|
|
}
|
|
|
|
|
|
// internal api
|
|
|
|
bool ThreadPool::Spawn(WorkerId_t workerId, bool create)
|
|
{
|
|
AU_LOCK_GUARD(rwlock_->AsWritable());
|
|
|
|
if (create)
|
|
{
|
|
gCurrentPool = AuSharedFromThis();
|
|
}
|
|
|
|
AuSPtr<GroupState> group;
|
|
|
|
// Try fetch or allocate group
|
|
{
|
|
AuSPtr<GroupState>* groupPtr;
|
|
if (!AuTryFind(this->threads_, workerId.first, groupPtr))
|
|
{
|
|
group = AuMakeShared<GroupState>();
|
|
|
|
if (!group->Init())
|
|
{
|
|
SysPushErrorMemory("Not enough memory to intiialize a new group state");
|
|
return false;
|
|
}
|
|
|
|
if (!AuTryInsert(this->threads_, AuMakePair(workerId.first, group)))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
group = *groupPtr;
|
|
}
|
|
}
|
|
|
|
// Assert worker does not already exist
|
|
{
|
|
AuSPtr<ThreadState>* ret;
|
|
|
|
if (AuTryFind(group->workers, workerId.second, ret))
|
|
{
|
|
SysPushErrorGeneric("Thread ID already exists");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
auto threadState = AuMakeShared<ThreadState>();
|
|
if (!threadState)
|
|
{
|
|
SysPushErrorMemory();
|
|
return {};
|
|
}
|
|
|
|
threadState->parent = group;
|
|
threadState->running = AuThreadPrimitives::EventUnique(true, false, true);
|
|
threadState->syncSema = AuThreadPrimitives::SemaphoreUnique(0);
|
|
threadState->id = workerId;
|
|
threadState->asyncLoop = AuMakeShared<AsyncLoop>();
|
|
if (!threadState->asyncLoop)
|
|
{
|
|
SysPushErrorMemory();
|
|
return {};
|
|
}
|
|
|
|
threadState->asyncLoop->pParent = threadState.get();
|
|
threadState->rateLimiter.SetNextStep(1'000'000); // 1MS in nanoseconds
|
|
threadState->runMode = ERunMode::eEfficient;
|
|
|
|
if (!threadState->asyncLoop)
|
|
{
|
|
SysPushErrorMemory();
|
|
return {};
|
|
}
|
|
|
|
if (!threadState->asyncLoop->Init())
|
|
{
|
|
SysPushErrorNested();
|
|
return {};
|
|
}
|
|
|
|
if (!threadState->syncSema)
|
|
{
|
|
SysPushErrorMemory();
|
|
return {};
|
|
}
|
|
|
|
if (!threadState->syncSema)
|
|
{
|
|
SysPushErrorMemory();
|
|
return {};
|
|
}
|
|
|
|
threadState->asyncLoop->SourceAdd(group->eventLs);
|
|
|
|
if (!create)
|
|
{
|
|
threadState->threadObject = AuThreads::ThreadShared(AuThreads::ThreadInfo(
|
|
AuMakeShared<AuThreads::IThreadVectorsFunctional>(AuThreads::IThreadVectorsFunctional::OnEntry_t(std::bind(&ThreadPool::Entrypoint, this, threadState->id)),
|
|
AuThreads::IThreadVectorsFunctional::OnExit_t{}),
|
|
gRuntimeConfig.async.threadPoolDefaultStackSize
|
|
));
|
|
if (!threadState->threadObject)
|
|
{
|
|
return {};
|
|
}
|
|
threadState->threadObject->Run();
|
|
}
|
|
else
|
|
{
|
|
threadState->threadObject = AuSPtr<AuThreads::IAuroraThread>(AuThreads::GetThread(), [](AuThreads::IAuroraThread *){});
|
|
|
|
// TODO: this is just a hack
|
|
// we should implement this properly
|
|
threadState->threadObject->AddLastHopeTlsHook(AuMakeShared<AuThreads::IThreadFeatureFunctional>([]() -> void
|
|
{
|
|
|
|
}, []() -> void
|
|
{
|
|
auto pid = GetCurrentWorkerPId();
|
|
if (pid.pool)
|
|
{
|
|
GetWorkerInternal(pid.pool)->ThisExiting();
|
|
}
|
|
}));
|
|
|
|
//
|
|
gCurrentPool = AuWeakFromThis();
|
|
tlsWorkerId = WorkerPId_t(AuSharedFromThis(), workerId);
|
|
}
|
|
|
|
group->workers.insert(AuMakePair(workerId.second, threadState));
|
|
return true;
|
|
}
|
|
|
|
// private api
|
|
|
|
AU_NOINLINE bool ThreadPool::Barrier(WorkerId_t workerId, AuUInt32 ms, bool requireSignal, bool drop)
|
|
{
|
|
auto self = GetThreadState();
|
|
if (!self)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
auto &semaphore = self->syncSema;
|
|
auto unsafeSemaphore = semaphore.get();
|
|
bool failed {};
|
|
|
|
auto work = AuMakeShared<AsyncFuncRunnable>(
|
|
[=]()
|
|
{
|
|
auto state = GetThreadState();
|
|
|
|
if (drop)
|
|
{
|
|
state->rejecting = true;
|
|
}
|
|
|
|
if (requireSignal)
|
|
{
|
|
state->running->Reset();
|
|
}
|
|
|
|
unsafeSemaphore->Unlock(1);
|
|
|
|
if (requireSignal)
|
|
{
|
|
state->running->Lock();
|
|
}
|
|
},
|
|
[&]()
|
|
{
|
|
unsafeSemaphore->Unlock(1);
|
|
failed = true;
|
|
}
|
|
);
|
|
|
|
if (!work)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
Run(workerId, work);
|
|
|
|
return WaitFor(workerId, AuUnsafeRaiiToShared(semaphore), ms) && !failed;
|
|
}
|
|
|
|
void ThreadPool::Entrypoint(WorkerId_t id)
|
|
{
|
|
gCurrentPool = AuWeakFromThis();
|
|
tlsWorkerId = WorkerPId_t(AuSharedFromThis(), id);
|
|
|
|
auto job = GetThreadState();
|
|
|
|
Run();
|
|
|
|
if (id != WorkerId_t {0, 0})
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
if (!this->shuttingdown_ && !job->rejecting)
|
|
{
|
|
// Pump and barrier + reject all after atomically
|
|
Barrier(id, 0, false, true);
|
|
}
|
|
}
|
|
|
|
ThisExiting();
|
|
|
|
if (id == WorkerId_t {0, 0})
|
|
{
|
|
CleanWorkerPoolReservedZeroFree();
|
|
}
|
|
}
|
|
|
|
void ThreadPool::EarlyExitTick()
|
|
{
|
|
auto jobWorker = GetThreadState();
|
|
auto state = jobWorker->parent.lock();
|
|
if (!jobWorker)
|
|
{
|
|
SysPushErrorUninitialized("Not an async thread");
|
|
return;
|
|
}
|
|
|
|
if ((this->shuttingdown_ & 2) != 2)
|
|
{
|
|
return;
|
|
}
|
|
|
|
state->eventLs->Set();
|
|
state->cvVariable->Broadcast();
|
|
|
|
{
|
|
if (AuExchange(jobWorker->bAlreadyDoingExitTick, true))
|
|
{
|
|
return;
|
|
}
|
|
|
|
AuUInt32 uCount {};
|
|
do
|
|
{
|
|
uCount = 0;
|
|
this->PollInternal(false, uCount);
|
|
}
|
|
while (uCount);
|
|
}
|
|
|
|
|
|
AuList<AuSPtr<AuThreads::IThreadFeature>> features;
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable()); // WARNING: this should be write, but im seeing a deadlock on exit
|
|
// there is no real race condition to be concerned about
|
|
// AsReadable shouldn't be enterable while someone is writing (the other accessor)
|
|
features = AuExchange(jobWorker->features, {});
|
|
}
|
|
|
|
{
|
|
for (const auto &thread : features)
|
|
{
|
|
try
|
|
{
|
|
thread->Cleanup();
|
|
}
|
|
catch (...)
|
|
{
|
|
SysPushErrorCatch("Couldn't clean up thread feature!");
|
|
}
|
|
}
|
|
|
|
if (!this->GetThreadState()->bIsKiller)
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
#if 0
|
|
// TODO... i know what to do
|
|
#else
|
|
// this will do for now
|
|
if (!jobWorker->rejecting &&
|
|
!this->shutdown)
|
|
{
|
|
this->Barrier(AuAsync::GetCurrentWorkerPId(), 0, false , true);
|
|
}
|
|
//this->Barrier(AuAsync::GetCurrentWorkerPId(), 0, false, false);
|
|
#endif
|
|
}
|
|
|
|
jobWorker->bAlreadyDoingExitTick = false;
|
|
jobWorker->bBreakEarly = true;
|
|
}
|
|
|
|
}
|
|
|
|
void ThreadPool::ThisExiting()
|
|
{
|
|
auto id = GetCurrentThread();
|
|
auto state = GetGroup(id.first);
|
|
|
|
|
|
AuList<AuSPtr<AuThreads::IThreadFeature>> features;
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsWritable());
|
|
|
|
auto itr = state->workers.find(id.second);
|
|
auto &jobWorker = itr->second;
|
|
|
|
CleanUpWorker(id);
|
|
|
|
// Abort scheduled tasks
|
|
TerminateSceduledTasks(this, id);
|
|
|
|
// Prevent deadlocks
|
|
jobWorker->syncSema->Unlock(10000); // prevent ::Barrier dead-locks
|
|
|
|
{
|
|
AU_LOCK_GUARD(jobWorker->externalFencesLock);
|
|
jobWorker->exitingflag2 = true;
|
|
|
|
for (const auto &pIWaitable : jobWorker->externalFences)
|
|
{
|
|
pIWaitable->Unlock();
|
|
}
|
|
|
|
jobWorker->externalFences.clear();
|
|
}
|
|
|
|
features = AuExchange(jobWorker->features, {});
|
|
}
|
|
|
|
{
|
|
// Clean up thread features
|
|
// -> transferable TLS handles
|
|
// -> thread specific vms
|
|
// -> anything your brain wishes to imagination
|
|
for (const auto &thread : features)
|
|
{
|
|
try
|
|
{
|
|
thread->Cleanup();
|
|
}
|
|
catch (...)
|
|
{
|
|
AuLogWarn("Couldn't clean up thread feature!");
|
|
Debug::PrintError();
|
|
}
|
|
}
|
|
|
|
features.clear();
|
|
}
|
|
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsWritable());
|
|
auto itr = state->workers.find(id.second);
|
|
auto &jobWorker = itr->second;
|
|
state->workers.erase(itr);
|
|
}
|
|
}
|
|
|
|
AuSPtr<GroupState> ThreadPool::GetGroup(ThreadGroup_t type)
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
AuSPtr<GroupState>* ret;
|
|
if (!AuTryFind(this->threads_, type, ret))
|
|
{
|
|
return {};
|
|
}
|
|
return *ret;
|
|
}
|
|
|
|
AuSPtr<ThreadState> ThreadPool::GetThreadState()
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
auto thread = gCurrentPool.lock();
|
|
if (!thread)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
#if defined(AU_CFG_ID_INTERNAL) || defined(AU_CFG_ID_DEBUG)
|
|
if (thread.get() != this)
|
|
{
|
|
SysPushErrorGeneric("wrong thread");
|
|
return {};
|
|
}
|
|
#endif
|
|
|
|
auto worker = *tlsWorkerId;
|
|
|
|
auto state = GetGroup(worker.first);
|
|
if (!state)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
return state->workers[worker.second];
|
|
}
|
|
|
|
AuSPtr<ThreadState> ThreadPool::GetThreadStateNoWarn()
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
auto thread = gCurrentPool.lock();
|
|
if (!thread)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
if (thread.get() != this)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
auto worker = *tlsWorkerId;
|
|
|
|
auto state = GetGroup(worker.first);
|
|
if (!state)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
return state->workers[worker.second];
|
|
}
|
|
|
|
AuSPtr<ThreadState> ThreadPool::GetThreadHandle(WorkerId_t id)
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
auto group = GetGroup(id.first);
|
|
if (!group)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
AuSPtr<ThreadState> *ret;
|
|
if (!AuTryFind(group->workers, id.second, ret))
|
|
{
|
|
return {};
|
|
}
|
|
|
|
return *ret;
|
|
}
|
|
|
|
AuList<AuSPtr<ThreadState>> ThreadPool::GetThreadHandles(WorkerId_t id)
|
|
{
|
|
AU_LOCK_GUARD(this->rwlock_->AsReadable());
|
|
|
|
auto group = GetGroup(id.first);
|
|
if (!group)
|
|
{
|
|
return {};
|
|
}
|
|
|
|
AuList<AuSPtr<ThreadState>> ret;
|
|
if (id.second != Async::kThreadIdAny)
|
|
{
|
|
AuSPtr<ThreadState> *ptr;
|
|
if (!AuTryFind(group->workers, id.second, ptr))
|
|
{
|
|
return {};
|
|
}
|
|
ret.push_back(*ptr);
|
|
}
|
|
else
|
|
{
|
|
for (const auto &[key, value] : group->workers)
|
|
{
|
|
ret.push_back(value);
|
|
}
|
|
}
|
|
|
|
|
|
return ret;
|
|
}
|
|
|
|
AUKN_SYM AuSPtr<IThreadPool> NewThreadPool()
|
|
{
|
|
// apps that don't require async shouldn't be burdened with the overhead of this litl spiner
|
|
StartSched();
|
|
return AuMakeShared<ThreadPool>();
|
|
}
|
|
} |