Migrate object cache stats

Summary: .. and kill the isRate check.

Reviewed By: jiayuebao

Differential Revision: D41112357

fbshipit-source-id: 7e9c7f69950963711e6e863ec50a02c64280c471

Author: Hao Wu

cachelib/experimental/objcache2/ObjectCache-inl.h

@@ -314,13 +314,20 @@ void ObjectCache<AllocatorT>::remove(folly::StringPiece key) {
 template <typename AllocatorT>
 void ObjectCache<AllocatorT>::getObjectCacheCounters(
     const util::CounterVisitor& visitor) const {
-  visitor("objcache.lookups", lookups_.get());
-  visitor("objcache.lookups.l1_hits", succL1Lookups_.get());
-  visitor("objcache.inserts", inserts_.get());
-  visitor("objcache.inserts.errors", insertErrors_.get());
-  visitor("objcache.replaces", replaces_.get());
-  visitor("objcache.removes", removes_.get());
-  visitor("objcache.evictions", evictions_.get());
+  visitor("objcache.lookups", lookups_.get(),
+          util::CounterVisitor::CounterType::RATE);
+  visitor("objcache.lookups.l1_hits", succL1Lookups_.get(),
+          util::CounterVisitor::CounterType::RATE);
+  visitor("objcache.inserts", inserts_.get(),
+          util::CounterVisitor::CounterType::RATE);
+  visitor("objcache.inserts.errors", insertErrors_.get(),
+          util::CounterVisitor::CounterType::RATE);
+  visitor("objcache.replaces", replaces_.get(),
+          util::CounterVisitor::CounterType::RATE);
+  visitor("objcache.removes", removes_.get(),
+          util::CounterVisitor::CounterType::RATE);
+  visitor("objcache.evictions", evictions_.get(),
+          util::CounterVisitor::CounterType::RATE);
   visitor("objcache.object_size_bytes", getTotalObjectSize());
 }