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/*
* Copyright (C) 2022-2023 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/os_interface/linux/cache_info.h"
#include "shared/source/debug_settings/debug_settings_manager.h"
#include "shared/source/helpers/common_types.h"
#include "shared/source/helpers/debug_helpers.h"
namespace NEO {
CacheInfo::~CacheInfo() {
for (auto const &cacheRegion : cacheRegionsReserved) {
cacheReserve.freeCache(CacheLevel::level3, cacheRegion.first);
}
cacheRegionsReserved.clear();
}
CacheRegion CacheInfo::reserveRegion(size_t cacheReservationSize) {
uint16_t numWays = (maxReservationNumWays * cacheReservationSize) / maxReservationCacheSize;
if (debugManager.flags.ClosNumCacheWays.get() != -1) {
numWays = debugManager.flags.ClosNumCacheWays.get();
cacheReservationSize = (numWays * maxReservationCacheSize) / maxReservationNumWays;
}
auto regionIndex = cacheReserve.reserveCache(CacheLevel::level3, numWays);
if (regionIndex == CacheRegion::none) {
return CacheRegion::none;
}
cacheRegionsReserved.insert({regionIndex, cacheReservationSize});
return regionIndex;
}
CacheRegion CacheInfo::freeRegion(CacheRegion regionIndex) {
auto search = cacheRegionsReserved.find(regionIndex);
if (search != cacheRegionsReserved.end()) {
cacheRegionsReserved.erase(search);
return cacheReserve.freeCache(CacheLevel::level3, regionIndex);
}
return CacheRegion::none;
}
bool CacheInfo::isRegionReserved(CacheRegion regionIndex, [[maybe_unused]] size_t regionSize) const {
auto search = cacheRegionsReserved.find(regionIndex);
if (search != cacheRegionsReserved.end()) {
if (debugManager.flags.ClosNumCacheWays.get() != -1) {
auto numWays = debugManager.flags.ClosNumCacheWays.get();
regionSize = (numWays * maxReservationCacheSize) / maxReservationNumWays;
}
DEBUG_BREAK_IF(search->second != regionSize);
return true;
}
return false;
}
bool CacheInfo::getRegion(size_t regionSize, CacheRegion regionIndex) {
if (regionIndex == CacheRegion::defaultRegion) {
return true;
}
if (!isRegionReserved(regionIndex, regionSize)) {
auto regionIdx = reserveRegion(regionSize);
if (regionIdx == CacheRegion::none) {
return false;
}
DEBUG_BREAK_IF(regionIdx != regionIndex);
}
return true;
}
} // namespace NEO
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