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#pragma once
#include <util/generic/yexception.h>
#include <util/stream/output.h>
#include <util/system/yassert.h>
#include <util/system/defaults.h>
#include <library/cpp/monlib/dynamic_counters/counters.h>
#include <type_traits>
#include <stack>
#include <vector>
#include <unordered_set>
#include <unordered_map>
namespace NKikimr {
struct TAlignedPagePoolCounters {
explicit TAlignedPagePoolCounters(NMonitoring::TDynamicCounterPtr countersRoot = nullptr, const TString& name = TString());
NMonitoring::TDynamicCounters::TCounterPtr TotalBytesAllocatedCntr;
NMonitoring::TDynamicCounters::TCounterPtr AllocationsCntr;
NMonitoring::TDynamicCounters::TCounterPtr PoolsCntr;
NMonitoring::TDynamicCounters::TCounterPtr LostPagesBytesFreeCntr;
void Swap(TAlignedPagePoolCounters& other) {
DoSwap(TotalBytesAllocatedCntr, other.TotalBytesAllocatedCntr);
DoSwap(AllocationsCntr, other.AllocationsCntr);
DoSwap(PoolsCntr, other.PoolsCntr);
DoSwap(LostPagesBytesFreeCntr, other.LostPagesBytesFreeCntr);
}
};
// NOTE: We intentionally avoid inheritance from std::exception here to make it harder
// to catch this exception in UDFs code, so we can handle it in the host.
class TMemoryLimitExceededException {};
class TAlignedPagePool {
public:
static constexpr ui64 POOL_PAGE_SIZE = 1ULL << 16; // 64k
static constexpr ui64 PAGE_ADDR_MASK = ~(POOL_PAGE_SIZE - 1);
explicit TAlignedPagePool(const TAlignedPagePoolCounters& counters = TAlignedPagePoolCounters())
: Counters(counters)
{
if (Counters.PoolsCntr) {
++(*Counters.PoolsCntr);
}
}
TAlignedPagePool(const TAlignedPagePool&) = delete;
TAlignedPagePool(TAlignedPagePool&& other) = delete;
TAlignedPagePool& operator = (const TAlignedPagePool&) = delete;
TAlignedPagePool& operator = (TAlignedPagePool&& other) = delete;
~TAlignedPagePool();
inline size_t GetAllocated() const noexcept {
return TotalAllocated;
}
inline size_t GetUsed() const noexcept {
return TotalAllocated - GetFreePageCount() * POOL_PAGE_SIZE;
}
inline size_t GetFreePageCount() const noexcept {
return FreePages.size();
}
static inline const void* GetPageStart(const void* addr) noexcept {
return reinterpret_cast<const void*>(reinterpret_cast<uintptr_t>(addr) & PAGE_ADDR_MASK);
}
static inline void* GetPageStart(void* addr) noexcept {
return reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(addr) & PAGE_ADDR_MASK);
}
void* GetPage();
void ReturnPage(void* addr) noexcept;
void Swap(TAlignedPagePool& other) {
DoSwap(FreePages, other.FreePages);
DoSwap(AllPages, other.AllPages);
DoSwap(ActiveBlocks, other.ActiveBlocks);
DoSwap(TotalAllocated, other.TotalAllocated);
DoSwap(PeakAllocated, other.PeakAllocated);
DoSwap(PeakUsed, other.PeakUsed);
DoSwap(Limit, other.Limit);
DoSwap(AllocCount, other.AllocCount);
DoSwap(PageAllocCount, other.PageAllocCount);
DoSwap(PageHitCount, other.PageHitCount);
DoSwap(PageGlobalHitCount, other.PageGlobalHitCount);
DoSwap(PageMissCount, other.PageMissCount);
DoSwap(OffloadedAllocCount, other.OffloadedAllocCount);
DoSwap(OffloadedBytes, other.OffloadedBytes);
DoSwap(OffloadedActiveBytes, other.OffloadedActiveBytes);
DoSwap(Counters, other.Counters);
DoSwap(CheckLostMem, other.CheckLostMem);
DoSwap(AllocNotifyCallback, other.AllocNotifyCallback);
DoSwap(IncreaseMemoryLimitCallback, other.IncreaseMemoryLimitCallback);
}
void PrintStat(size_t usedPages, IOutputStream& out) const;
void* GetBlock(size_t size);
void ReturnBlock(void* ptr, size_t size) noexcept;
size_t GetPeakAllocated() const noexcept {
return PeakAllocated;
}
size_t GetPeakUsed() const noexcept {
return PeakUsed;
}
ui64 GetAllocCount() const noexcept {
return AllocCount;
}
ui64 GetPageAllocCount() const noexcept {
return PageAllocCount;
}
ui64 GetPageHitCount() const noexcept {
return PageHitCount;
}
ui64 GetPageGlobalHitCount() const noexcept {
return PageGlobalHitCount;
}
ui64 GetPageMissCount() const noexcept {
return PageMissCount;
}
ui64 GetOffloadedAllocCount() const noexcept {
return OffloadedAllocCount;
}
ui64 GetOffloadedBytes() const noexcept {
return OffloadedBytes;
}
void OffloadAlloc(ui64 size);
void OffloadFree(ui64 size) noexcept;
static ui64 GetGlobalPagePoolSize();
ui64 GetLimit() const noexcept {
return Limit;
}
void SetLimit(size_t limit) noexcept {
Limit = limit;
}
void ReleaseFreePages();
void DisableStrictAllocationCheck() noexcept {
CheckLostMem = false;
}
using TAllocNotifyCallback = std::function<void()>;
void SetAllocNotifyCallback(TAllocNotifyCallback&& callback, ui64 notifyBytes = 0) {
AllocNotifyCallback = std::move(callback);
AllocNotifyBytes = notifyBytes;
AllocNotifyCurrentBytes = 0;
}
using TIncreaseMemoryLimitCallback = std::function<void(ui64 currentLimit, ui64 required)>;
void SetIncreaseMemoryLimitCallback(TIncreaseMemoryLimitCallback&& callback) {
IncreaseMemoryLimitCallback = std::move(callback);
}
protected:
void* Alloc(size_t size);
void Free(void* ptr, size_t size) noexcept;
void UpdatePeaks() {
PeakAllocated = Max(PeakAllocated, GetAllocated());
PeakUsed = Max(PeakUsed, GetUsed());
}
bool TryIncreaseLimit(ui64 required);
protected:
std::stack<void*, std::vector<void*>> FreePages;
std::unordered_set<void*> AllPages;
std::unordered_map<void*, size_t> ActiveBlocks;
size_t TotalAllocated = 0;
size_t PeakAllocated = 0;
size_t PeakUsed = 0;
size_t Limit = 0;
ui64 AllocCount = 0;
ui64 PageAllocCount = 0;
ui64 PageHitCount = 0;
ui64 PageGlobalHitCount = 0;
ui64 PageMissCount = 0;
ui64 OffloadedAllocCount = 0;
ui64 OffloadedBytes = 0;
ui64 OffloadedActiveBytes = 0;
TAlignedPagePoolCounters Counters;
bool CheckLostMem = true;
TAllocNotifyCallback AllocNotifyCallback;
ui64 AllocNotifyBytes = 0;
ui64 AllocNotifyCurrentBytes = 0;
TIncreaseMemoryLimitCallback IncreaseMemoryLimitCallback;
};
} // NKikimr
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