1 files changed, 120 insertions, 0 deletions
diff --git a/src/mongo/db/catalog/collection_catalog_bm.cpp b/src/mongo/db/catalog/collection_catalog_bm.cpp
new file mode 100644
index 00000000000..eedb6bf1e1c
--- /dev/null
+++ b/src/mongo/db/catalog/collection_catalog_bm.cpp
@@ -0,0 +1,120 @@
+/**
+ *    Copyright (C) 2021-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include <benchmark/benchmark.h>
+
+#include "mongo/db/catalog/collection_catalog.h"
+#include "mongo/db/catalog/collection_mock.h"
+#include "mongo/db/concurrency/d_concurrency.h"
+#include "mongo/db/concurrency/lock_state.h"
+#include "mongo/db/operation_context.h"
+#include "mongo/db/service_context.h"
+#include "mongo/util/uuid.h"
+
+namespace mongo {
+
+namespace {
+
+class LockerImplClientObserver : public ServiceContext::ClientObserver {
+public:
+    LockerImplClientObserver() = default;
+    ~LockerImplClientObserver() = default;
+
+    void onCreateClient(Client* client) final {}
+
+    void onDestroyClient(Client* client) final {}
+
+    void onCreateOperationContext(OperationContext* opCtx) override {
+        opCtx->setLockState(std::make_unique<LockerImpl>());
+    }
+
+    void onDestroyOperationContext(OperationContext* opCtx) final {}
+};
+
+const ServiceContext::ConstructorActionRegisterer clientObserverRegisterer{
+    "CollectionCatalogBenchmarkClientObserver",
+    [](ServiceContext* service) {
+        service->registerClientObserver(std::make_unique<LockerImplClientObserver>());
+    },
+    [](ServiceContext* serviceContext) {}};
+
+ServiceContext* setupServiceContext() {
+    auto serviceContext = ServiceContext::make();
+    auto serviceContextPtr = serviceContext.get();
+    setGlobalServiceContext(std::move(serviceContext));
+    return serviceContextPtr;
+}
+
+void createCollections(OperationContext* opCtx, int numCollections) {
+    Lock::GlobalLock globalLk(opCtx, MODE_X);
+    BatchedCollectionCatalogWriter batched(opCtx);
+
+    for (auto i = 0; i < numCollections; i++) {
+        const NamespaceString nss("collection_catalog_bm", std::to_string(i));
+        CollectionCatalog::write(opCtx, [&](CollectionCatalog& catalog) {
+            catalog.registerCollection(opCtx, UUID::gen(), std::make_shared<CollectionMock>(nss));
+        });
+    }
+}
+
+}  // namespace
+
+void BM_CollectionCatalogWrite(benchmark::State& state) {
+    auto serviceContext = setupServiceContext();
+    ThreadClient threadClient(serviceContext);
+    ServiceContext::UniqueOperationContext opCtx = threadClient->makeOperationContext();
+
+    createCollections(opCtx.get(), state.range(0));
+
+    for (auto _ : state) {
+        benchmark::ClobberMemory();
+        CollectionCatalog::write(opCtx.get(), [&](CollectionCatalog& catalog) {});
+    }
+}
+
+void BM_CollectionCatalogWriteBatchedWithGlobalExclusiveLock(benchmark::State& state) {
+    auto serviceContext = setupServiceContext();
+    ThreadClient threadClient(serviceContext);
+    ServiceContext::UniqueOperationContext opCtx = threadClient->makeOperationContext();
+
+    createCollections(opCtx.get(), state.range(0));
+
+    Lock::GlobalLock globalLk(opCtx.get(), MODE_X);
+    BatchedCollectionCatalogWriter batched(opCtx.get());
+
+    for (auto _ : state) {
+        benchmark::ClobberMemory();
+        CollectionCatalog::write(opCtx.get(), [&](CollectionCatalog& catalog) {});
+    }
+}
+
+BENCHMARK(BM_CollectionCatalogWrite)->Ranges({{{1}, {100'000}}});
+BENCHMARK(BM_CollectionCatalogWriteBatchedWithGlobalExclusiveLock)->Ranges({{{1}, {100'000}}});
+
+}  // namespace mongo