- Change the cache size calculation to use getCacheSize()

- Switch to isUsingPosixShm() method

Author: byrnedj

cachelib/allocator/CacheAllocator-inl.h

@@ -54,11 +54,11 @@ CacheAllocator<CacheTrait>::CacheAllocator(
                                           : config.memMonitoringEnabled()},
       config_(config.validate()),
       tempShm_(type == InitMemType::kNone && isOnShm_
-                   ? std::make_unique<TempShmMapping>(config_.size)
+                   ? std::make_unique<TempShmMapping>(config_.getCacheSize())
                    : nullptr),
       shmManager_(type != InitMemType::kNone
                       ? std::make_unique<ShmManager>(config_.cacheDir,
-                                                     config_.usePosixShm)
+                                                     config_.isUsingPosixShm())
                       : nullptr),
       deserializer_(type == InitMemType::kMemAttach ? createDeserializer()
                                                     : nullptr),
@@ -122,10 +122,10 @@ CacheAllocator<CacheTrait>::createNewMemoryAllocator() {
   return std::make_unique<MemoryAllocator>(
       getAllocatorConfig(config_),
       shmManager_
-          ->createShm(detail::kShmCacheName, config_.size,
+          ->createShm(detail::kShmCacheName, config_.getCacheSize(),
                       config_.slabMemoryBaseAddr, createShmCacheOpts())
           .addr,
-      config_.size);
+      config_.getCacheSize());
 }
 
 template <typename CacheTrait>
@@ -137,7 +137,7 @@ CacheAllocator<CacheTrait>::restoreMemoryAllocator() {
           ->attachShm(detail::kShmCacheName, config_.slabMemoryBaseAddr,
                       createShmCacheOpts())
           .addr,
-      config_.size,
+      config_.getCacheSize(),
       config_.disableFullCoredump);
 }
 
@@ -242,11 +242,12 @@ std::unique_ptr<MemoryAllocator> CacheAllocator<CacheTrait>::initAllocator(
     InitMemType type) {
   if (type == InitMemType::kNone) {
     if (isOnShm_ == true) {
-      return std::make_unique<MemoryAllocator>(
-          getAllocatorConfig(config_), tempShm_->getAddr(), config_.size);
+      return std::make_unique<MemoryAllocator>(getAllocatorConfig(config_),
+                                               tempShm_->getAddr(),
+                                               config_.getCacheSize());
     } else {
       return std::make_unique<MemoryAllocator>(getAllocatorConfig(config_),
-                                               config_.size);
+                                               config_.getCacheSize());
     }
   } else if (type == InitMemType::kMemNew) {
     return createNewMemoryAllocator();
@@ -2259,7 +2260,7 @@ PoolEvictionAgeStats CacheAllocator<CacheTrait>::getPoolEvictionAgeStats(
 template <typename CacheTrait>
 CacheMetadata CacheAllocator<CacheTrait>::getCacheMetadata() const noexcept {
   return CacheMetadata{kCachelibVersion, kCacheRamFormatVersion,
-                       kCacheNvmFormatVersion, config_.size};
+                       kCacheNvmFormatVersion, config_.getCacheSize()};
 }
 
 template <typename CacheTrait>

cachelib/allocator/CacheAllocatorConfig.h

@@ -1092,7 +1092,7 @@ std::map<std::string, std::string> CacheAllocatorConfig<T>::serialize() const {
 
   configMap["size"] = std::to_string(size);
   configMap["cacheDir"] = cacheDir;
-  configMap["posixShm"] = usePosixShm ? "set" : "empty";
+  configMap["posixShm"] = isUsingPosixShm() ? "set" : "empty";
 
   configMap["defaultAllocSizes"] = "";
   // Stringify std::set

cachelib/allocator/memory/SlabAllocator.cpp

@@ -40,7 +40,9 @@
 using namespace facebook::cachelib;
 
 namespace {
-size_t roundDownToSlabSize(size_t size) { return size - (size % sizeof(Slab)); }
+static inline size_t roundDownToSlabSize(size_t size) {
+  return size - (size % sizeof(Slab));
+}
 } // namespace
 
 // definitions to avoid ODR violation.