Print WBM's cache info to log (#312)

speedb-io · Dec 25, 2022 · 717f26e · 717f26e
1 parent a2c3d50
commit 717f26e
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diff --git a/cache/cache_reservation_manager.h b/cache/cache_reservation_manager.h
@@ -202,6 +202,8 @@ class CacheReservationManagerImpl
   // test are from the same translation units
   static Cache::DeleterFn TEST_GetNoopDeleterForRole();
 
+  const Cache* TEST_GetCache() const { return cache_.get(); }
+
  private:
   static constexpr std::size_t kSizeDummyEntry = 256 * 1024;
 

diff --git a/memtable/write_buffer_manager.cc b/memtable/write_buffer_manager.cc
@@ -285,6 +285,13 @@ std::string WriteBufferManager::GetPrintableOptions() const {
            "wbm.size", buffer_size());
   ret.append(buffer);
 
+  const Cache* cache = nullptr;
+  if (cache_res_mgr_ != nullptr) {
+    cache = static_cast<CacheReservationManagerImpl<CacheEntryRole::kWriteBuffer>*>(cache_res_mgr_.get())->TEST_GetCache();
+  }
+  snprintf(buffer, kBufferSize, "%*s: %p\n", field_width, "wbm.cache", cache);
+  ret.append(buffer);
+
   snprintf(buffer, kBufferSize, "%*s: %d\n", field_width, "wbm.allow_stalls",
            allow_stall_);
   ret.append(buffer);