[Filestore] issue-4547: add benchmark for index tablet DescribeData with 1 MiB requests

cloud/filestore/libs/storage/tablet/bench/tablet_bench.cpp

@@ -0,0 +1,93 @@
+#include <cloud/filestore/libs/storage/tablet/tablet.h>
+
+#include <cloud/filestore/libs/storage/testlib/tablet_client.h>
+#include <cloud/filestore/libs/storage/testlib/test_env.h>
+
+#include <library/cpp/testing/benchmark/bench.h>
+
+#include <util/generic/vector.h>
+
+#include <atomic>
+#include <memory>
+
+using namespace NCloud;
+using namespace NCloud::NFileStore;
+using namespace NCloud::NFileStore::NStorage;
+
+namespace {
+
+////////////////////////////////////////////////////////////////////////////////
+
+constexpr ui32 BlockSize = 4096;
+
+////////////////////////////////////////////////////////////////////////////////
+
+struct TTabletSetup
+{
+    TTestEnv Env;
+    std::unique_ptr<TIndexTabletClient> TabletClient;
+    ui64 Handle = 0;
+
+    TTabletSetup()
+        : Env(TTestEnvConfig{
+            .LogPriority_NFS = NActors::NLog::PRI_ALERT,
+            .LogPriority_KiKiMR = NActors::NLog::PRI_ALERT,
+            .LogPriority_Others = NActors::NLog::PRI_ALERT})
+    {
+        Env.CreateSubDomain("nfs");
+
+        ui32 nodeIdx = Env.CreateNode("nfs");
+        ui64 tabletId = Env.BootIndexTablet(nodeIdx);
+
+        TabletClient = std::make_unique<TIndexTabletClient>(
+            Env.GetRuntime(),
+            nodeIdx,
+            tabletId,
+            TFileSystemConfig{.BlockSize = BlockSize});
+        TabletClient->InitSession("client", "session");
+
+        auto nodeId = CreateNode(
+            *TabletClient,
+            TCreateNodeArgs::File(RootNodeId, "test"));
+
+        Handle = CreateHandle(*TabletClient, nodeId);
+        TabletClient->WriteData(Handle, 0, 1_MB, '1');
+    }
+
+    void DescribeData(ui64 offset, ui64 length)
+    {
+        auto response = TabletClient->DescribeData(Handle, offset, length);
+        Y_ABORT_UNLESS(1_MB == response->Record.GetFileSize());
+    }
+};
+
+std::atomic<TTabletSetup*> Tablet = nullptr;
+
+TTabletSetup* GetOrCreateTablet()
+{
+    if (Tablet.load()) {
+        return Tablet.load();
+    }
+
+    auto tmp = std::make_unique<TTabletSetup>();
+    TTabletSetup* expected = nullptr;
+    if (!Tablet.compare_exchange_strong(expected, tmp.get())) {
+        return Tablet.load();
+    }
+
+    // Memory leak is OK here
+    return tmp.release();
+}
+
+}   // namespace
+
+////////////////////////////////////////////////////////////////////////////////
+
+Y_CPU_BENCHMARK(TTablet_DescribeData_1MiBRequestSize, iface)
+{
+    auto* tablet = GetOrCreateTablet();
+
+    for (size_t i = 0; i < iface.Iterations(); ++i) {
+        tablet->DescribeData(0, 1_MB);
+    }
+}

cloud/filestore/libs/storage/tablet/bench/ya.make

@@ -0,0 +1,21 @@
+Y_BENCHMARK()
+
+IF (SANITIZER_TYPE)
+    TAG(ya:manual)
+ENDIF()
+
+SRCS(
+    tablet_bench.cpp
+)
+
+PEERDIR(
+    cloud/filestore/libs/storage/testlib
+)
+
+PEERDIR(
+    cloud/filestore/libs/storage/tablet
+)
+
+YQL_LAST_ABI_VERSION()
+
+END()

cloud/filestore/libs/storage/tablet/ya.make

@@ -134,6 +134,7 @@ RECURSE(
 )
 
 RECURSE_FOR_TESTS(
+    bench
     ut
     ut_cache_stress
     ut_counters