Adding lockMemory flag support to the cachebench (#81)

Author: vinser52

cachelib/cachebench/cache/Cache-inl.h

@@ -98,6 +98,8 @@ Cache<Allocator>::Cache(const CacheConfig& config,
     allocatorConfig_.usePosixForShm();
   }
 
+  allocatorConfig_.setMemoryLocking(config_.lockMemory);
+
   if (!config_.memoryTierConfigs.empty()) {
     allocatorConfig_.configureMemoryTiers(config_.memoryTierConfigs);
   }

cachelib/cachebench/util/CacheConfig.cpp

@@ -91,6 +91,7 @@ CacheConfig::CacheConfig(const folly::dynamic& configJson) {
   JSONSetVal(configJson, memoryOnlyTTL);
 
   JSONSetVal(configJson, usePosixShm);
+  JSONSetVal(configJson, lockMemory);
   if (configJson.count("memoryTiers")) {
     for (auto& it : configJson["memoryTiers"]) {
       memoryTierConfigs.push_back(

cachelib/cachebench/util/CacheConfig.h

@@ -222,6 +222,9 @@ struct CacheConfig : public JSONConfig {
   // Use Posix Shm instead of SysVShm
   bool usePosixShm{false};
 
+  // Lock memory in the RAM
+  bool lockMemory{false};
+
   // Memory tiers configs
   std::vector<MemoryTierCacheConfig> memoryTierConfigs{};