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#include "stdafx.h"
#include "ib_mem.h"
#include "ib_low.h"
#include "cpu_affinity.h"
#if defined(_unix_)
#include <pthread.h>
#endif
namespace NNetliba {
TIBMemSuperBlock::TIBMemSuperBlock(TIBMemPool* pool, size_t szLog)
: Pool(pool)
, SzLog(szLog)
, UseCount(0)
{
size_t sz = GetSize();
MemRegion = new TMemoryRegion(pool->GetIBContext(), sz);
//printf("Alloc super block, size %" PRId64 "\n", sz);
}
TIBMemSuperBlock::~TIBMemSuperBlock() {
Y_ASSERT(AtomicGet(UseCount) == 0);
}
char* TIBMemSuperBlock::GetData() {
return MemRegion->GetData();
}
void TIBMemSuperBlock::DecRef() {
if (AtomicAdd(UseCount, -1) == 0) {
Pool->Return(this);
}
}
TIBMemBlock::~TIBMemBlock() {
if (Super.Get()) {
Super->DecRef();
} else {
delete[] Data;
}
}
//////////////////////////////////////////////////////////////////////////
TIBMemPool::TIBMemPool(TPtrArg<TIBContext> ctx)
: IBCtx(ctx)
, AllocCacheSize(0)
, CurrentOffset(IB_MEM_LARGE_BLOCK)
, WorkThread(TThread::TParams(ThreadFunc, (void*)this).SetName("nl6_ib_mem_pool"))
, KeepRunning(true)
{
WorkThread.Start();
HasStarted.Wait();
}
TIBMemPool::~TIBMemPool() {
Y_ASSERT(WorkThread.Running());
KeepRunning = false;
HasWork.Signal();
WorkThread.Join();
{
TJobItem* work = nullptr;
while (Requests.Dequeue(&work)) {
delete work;
}
}
}
TIntrusivePtr<TIBMemSuperBlock> TIBMemPool::AllocSuper(size_t szArg) {
// assume CacheLock is taken
size_t szLog = 12;
while ((((size_t)1) << szLog) < szArg) {
++szLog;
}
TIntrusivePtr<TIBMemSuperBlock> super;
{
TVector<TIntrusivePtr<TIBMemSuperBlock>>& cc = AllocCache[szLog];
if (!cc.empty()) {
super = cc.back();
cc.resize(cc.size() - 1);
AllocCacheSize -= 1ll << super->SzLog;
}
}
if (super.Get() == nullptr) {
super = new TIBMemSuperBlock(this, szLog);
}
return super;
}
TIBMemBlock* TIBMemPool::Alloc(size_t sz) {
TGuard<TMutex> gg(CacheLock);
if (sz > IB_MEM_LARGE_BLOCK) {
TIntrusivePtr<TIBMemSuperBlock> super = AllocSuper(sz);
return new TIBMemBlock(super, super->GetData(), sz);
} else {
if (CurrentOffset + sz > IB_MEM_LARGE_BLOCK) {
CurrentBlk.Assign(AllocSuper(IB_MEM_LARGE_BLOCK));
CurrentOffset = 0;
}
CurrentOffset += sz;
return new TIBMemBlock(CurrentBlk.Get(), CurrentBlk.Get()->GetData() + CurrentOffset - sz, sz);
}
}
void TIBMemPool::Return(TPtrArg<TIBMemSuperBlock> blk) {
TGuard<TMutex> gg(CacheLock);
Y_ASSERT(AtomicGet(blk->UseCount) == 0);
size_t sz = 1ull << blk->SzLog;
if (sz + AllocCacheSize > IB_MEM_POOL_SIZE) {
AllocCache.clear();
AllocCacheSize = 0;
}
{
TVector<TIntrusivePtr<TIBMemSuperBlock>>& cc = AllocCache[blk->SzLog];
cc.push_back(blk.Get());
AllocCacheSize += sz;
}
}
void* TIBMemPool::ThreadFunc(void* param) {
BindToSocket(0);
SetHighestThreadPriority();
TIBMemPool* pThis = (TIBMemPool*)param;
pThis->HasStarted.Signal();
while (pThis->KeepRunning) {
TJobItem* work = nullptr;
if (!pThis->Requests.Dequeue(&work)) {
pThis->HasWork.Reset();
if (!pThis->Requests.Dequeue(&work)) {
pThis->HasWork.Wait();
}
}
if (work) {
//printf("mem copy got work\n");
int sz = work->Data->GetSize();
work->Block = pThis->Alloc(sz);
TBlockChainIterator bc(work->Data->GetChain());
bc.Read(work->Block->GetData(), sz);
TIntrusivePtr<TCopyResultStorage> dst = work->ResultStorage;
work->ResultStorage = nullptr;
dst->Results.Enqueue(work);
//printf("mem copy completed\n");
}
}
return nullptr;
}
//////////////////////////////////////////////////////////////////////////
static TMutex IBMemMutex;
static TIntrusivePtr<TIBMemPool> IBMemPool;
static bool IBWasInitialized;
TIntrusivePtr<TIBMemPool> GetIBMemPool() {
TGuard<TMutex> gg(IBMemMutex);
if (IBWasInitialized) {
return IBMemPool;
}
IBWasInitialized = true;
TIntrusivePtr<TIBPort> ibPort = GetIBDevice();
if (ibPort.Get() == nullptr) {
return nullptr;
}
IBMemPool = new TIBMemPool(ibPort->GetCtx());
return IBMemPool;
}
}
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