AC stats multi-tier

Author: byrnedj

cachelib/allocator/Cache.h

@@ -112,7 +112,7 @@ class CacheBase {
   //
   // @param poolId   the pool id
   // @param classId   the class id
-  virtual ACStats getACStats(TierId tid,PoolId poolId, ClassId classId) const = 0;
+  virtual ACStats getACStats(TierId tid, PoolId poolId, ClassId classId) const = 0;
 
   // @param poolId   the pool id
   virtual AllSlabReleaseEvents getAllSlabReleaseEvents(PoolId poolId) const = 0;

cachelib/cachebench/cache/CacheStats.h

@@ -193,7 +193,17 @@ struct Stats {
         }
       };
 
-      foreachAC(allocationClassStats, [&](auto tid, auto pid, auto cid, auto stats) {
+      auto foreachAC = [&](auto cb) {
+        for (auto& tidStat : allocationClassStats) {
+          for (auto& pidStat : tidStat.second) {
+            for (auto& cidStat : pidStat.second) {
+              cb(tidStat.first, pidStat.first, cidStat.first, cidStat.second);
+            }
+          }
+        }
+      };
+
+      foreachAC([&](auto tid, auto pid, auto cid, auto stats) {
         auto [allocSizeSuffix, allocSize] = formatMemory(stats.allocSize);
         auto [memorySizeSuffix, memorySize] =
             formatMemory(stats.totalAllocatedSize());
@@ -203,7 +213,7 @@ struct Stats {
             << std::endl;
       });
 
-      foreachAC(allocationClassStats, [&](auto tid, auto pid, auto cid, auto stats) {
+      foreachAC([&](auto tid, auto pid, auto cid, auto stats) {
         auto [allocSizeSuffix, allocSize] = formatMemory(stats.allocSize);
 
         // If the pool is not full, extrapolate usageFraction for AC assuming it