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#include <library/cpp/balloc/lib/alloc_stats.h>
#include <util/system/compiler.h>
#include <atomic>
namespace NAllocStats {
struct TThreadAllocStats {
i64 CurrSize = 0;
i64 MaxSize = 0;
};
struct TGlobalAllocStats {
std::atomic<ui64> LiveLock = {0};
std::atomic<ui64> Mmap = {0};
};
#if defined(_unix_) && !defined(_darwin_)
__thread bool isEnabled = false;
bool IsEnabled() noexcept {
return isEnabled;
}
void EnableAllocStats(bool enable) noexcept {
isEnabled = enable;
}
__thread TThreadAllocStats threadAllocStats;
void IncThreadAllocStats(i64 size) noexcept {
threadAllocStats.CurrSize += size;
if (Y_UNLIKELY(threadAllocStats.CurrSize > threadAllocStats.MaxSize)) {
threadAllocStats.MaxSize = threadAllocStats.CurrSize;
}
}
void DecThreadAllocStats(i64 size) noexcept {
threadAllocStats.CurrSize -= size;
}
void ResetThreadAllocStats() noexcept {
threadAllocStats.CurrSize = 0;
threadAllocStats.MaxSize = 0;
}
i64 GetThreadAllocMax() noexcept {
return threadAllocStats.MaxSize;
}
#else // _unix_ && ! _darwin_
bool IsEnabled() noexcept {
return false;
}
void EnableAllocStats(bool /*enable*/) noexcept {
}
void IncThreadAllocStats(i64 /*size*/) noexcept {
}
void DecThreadAllocStats(i64 /*size*/) noexcept {
}
void ResetThreadAllocStats() noexcept {
}
i64 GetThreadAllocMax() noexcept {
return 0;
}
#endif // _unix_ && ! _darwin_
#if defined(_x86_64_) || defined(_i386_)
static constexpr size_t CACHE_LINE_SIZE = 64;
#elif defined(_arm64_) || defined(_ppc64_)
static constexpr size_t CACHE_LINE_SIZE = 128;
#else
static constexpr size_t CACHE_LINE_SIZE = 256; // default large enough
#endif
template <typename T>
struct alignas(sizeof(T)) TCacheLineDoublePaddedAtomic {
char Prefix[CACHE_LINE_SIZE - sizeof(T)];
T Value;
char Postfix[CACHE_LINE_SIZE - sizeof(T)];
};
TCacheLineDoublePaddedAtomic<TGlobalAllocStats> GlobalCounters;
void IncLiveLockCounter() noexcept {
GlobalCounters.Value.LiveLock.fetch_add(1, std::memory_order_seq_cst);
}
ui64 GetLiveLockCounter() noexcept {
return GlobalCounters.Value.LiveLock.load(std::memory_order_acquire);
}
void IncMmapCounter(ui64 amount) noexcept {
GlobalCounters.Value.Mmap.fetch_add(amount, std::memory_order_seq_cst);
}
ui64 GetMmapCounter() noexcept {
return GlobalCounters.Value.Mmap.load(std::memory_order_acquire);
}
} // namespace NAllocStats
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