Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 349 insertions, 0 deletions

diff --git a/src/rocksdb/table/table_reader_bench.cc b/src/rocksdb/table/table_reader_bench.cc
new file mode 100644
index 000000000..b13caf68d
--- /dev/null
+++ b/src/rocksdb/table/table_reader_bench.cc
@@ -0,0 +1,349 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#ifndef GFLAGS
+#include <cstdio>
+int main() {
+  fprintf(stderr, "Please install gflags to run rocksdb tools\n");
+  return 1;
+}
+#else
+
+#include "db/db_impl/db_impl.h"
+#include "db/dbformat.h"
+#include "file/random_access_file_reader.h"
+#include "monitoring/histogram.h"
+#include "rocksdb/db.h"
+#include "rocksdb/file_system.h"
+#include "rocksdb/slice_transform.h"
+#include "rocksdb/system_clock.h"
+#include "rocksdb/table.h"
+#include "table/block_based/block_based_table_factory.h"
+#include "table/get_context.h"
+#include "table/internal_iterator.h"
+#include "table/plain/plain_table_factory.h"
+#include "table/table_builder.h"
+#include "test_util/testharness.h"
+#include "test_util/testutil.h"
+#include "util/gflags_compat.h"
+
+using GFLAGS_NAMESPACE::ParseCommandLineFlags;
+using GFLAGS_NAMESPACE::SetUsageMessage;
+
+namespace ROCKSDB_NAMESPACE {
+
+namespace {
+// Make a key that i determines the first 4 characters and j determines the
+// last 4 characters.
+static std::string MakeKey(int i, int j, bool through_db) {
+  char buf[100];
+  snprintf(buf, sizeof(buf), "%04d__key___%04d", i, j);
+  if (through_db) {
+    return std::string(buf);
+  }
+  // If we directly query table, which operates on internal keys
+  // instead of user keys, we need to add 8 bytes of internal
+  // information (row type etc) to user key to make an internal
+  // key.
+  InternalKey key(std::string(buf), 0, ValueType::kTypeValue);
+  return key.Encode().ToString();
+}
+
+uint64_t Now(SystemClock* clock, bool measured_by_nanosecond) {
+  return measured_by_nanosecond ? clock->NowNanos() : clock->NowMicros();
+}
+}  // namespace
+
+// A very simple benchmark that.
+// Create a table with roughly numKey1 * numKey2 keys,
+// where there are numKey1 prefixes of the key, each has numKey2 number of
+// distinguished key, differing in the suffix part.
+// If if_query_empty_keys = false, query the existing keys numKey1 * numKey2
+// times randomly.
+// If if_query_empty_keys = true, query numKey1 * numKey2 random empty keys.
+// Print out the total time.
+// If through_db=true, a full DB will be created and queries will be against
+// it. Otherwise, operations will be directly through table level.
+//
+// If for_terator=true, instead of just query one key each time, it queries
+// a range sharing the same prefix.
+namespace {
+void TableReaderBenchmark(Options& opts, EnvOptions& env_options,
+                          ReadOptions& read_options, int num_keys1,
+                          int num_keys2, int num_iter, int /*prefix_len*/,
+                          bool if_query_empty_keys, bool for_iterator,
+                          bool through_db, bool measured_by_nanosecond) {
+  ROCKSDB_NAMESPACE::InternalKeyComparator ikc(opts.comparator);
+
+  std::string file_name =
+      test::PerThreadDBPath("rocksdb_table_reader_benchmark");
+  std::string dbname = test::PerThreadDBPath("rocksdb_table_reader_bench_db");
+  WriteOptions wo;
+  Env* env = Env::Default();
+  auto* clock = env->GetSystemClock().get();
+  TableBuilder* tb = nullptr;
+  DB* db = nullptr;
+  Status s;
+  const ImmutableOptions ioptions(opts);
+  const ColumnFamilyOptions cfo(opts);
+  const MutableCFOptions moptions(cfo);
+  std::unique_ptr<WritableFileWriter> file_writer;
+  if (!through_db) {
+    ASSERT_OK(WritableFileWriter::Create(env->GetFileSystem(), file_name,
+                                         FileOptions(env_options), &file_writer,
+                                         nullptr));
+
+    IntTblPropCollectorFactories int_tbl_prop_collector_factories;
+
+    int unknown_level = -1;
+    tb = opts.table_factory->NewTableBuilder(
+        TableBuilderOptions(
+            ioptions, moptions, ikc, &int_tbl_prop_collector_factories,
+            CompressionType::kNoCompression, CompressionOptions(),
+            0 /* column_family_id */, kDefaultColumnFamilyName, unknown_level),
+        file_writer.get());
+  } else {
+    s = DB::Open(opts, dbname, &db);
+    ASSERT_OK(s);
+    ASSERT_TRUE(db != nullptr);
+  }
+  // Populate slightly more than 1M keys
+  for (int i = 0; i < num_keys1; i++) {
+    for (int j = 0; j < num_keys2; j++) {
+      std::string key = MakeKey(i * 2, j, through_db);
+      if (!through_db) {
+        tb->Add(key, key);
+      } else {
+        db->Put(wo, key, key);
+      }
+    }
+  }
+  if (!through_db) {
+    tb->Finish();
+    file_writer->Close();
+  } else {
+    db->Flush(FlushOptions());
+  }
+
+  std::unique_ptr<TableReader> table_reader;
+  if (!through_db) {
+    const auto& fs = env->GetFileSystem();
+    FileOptions fopts(env_options);
+
+    std::unique_ptr<FSRandomAccessFile> raf;
+    s = fs->NewRandomAccessFile(file_name, fopts, &raf, nullptr);
+    if (!s.ok()) {
+      fprintf(stderr, "Create File Error: %s\n", s.ToString().c_str());
+      exit(1);
+    }
+    uint64_t file_size;
+    fs->GetFileSize(file_name, fopts.io_options, &file_size, nullptr);
+    std::unique_ptr<RandomAccessFileReader> file_reader(
+        new RandomAccessFileReader(std::move(raf), file_name));
+    s = opts.table_factory->NewTableReader(
+        TableReaderOptions(ioptions, moptions.prefix_extractor, env_options,
+                           ikc),
+        std::move(file_reader), file_size, &table_reader);
+    if (!s.ok()) {
+      fprintf(stderr, "Open Table Error: %s\n", s.ToString().c_str());
+      exit(1);
+    }
+  }
+
+  Random rnd(301);
+  std::string result;
+  HistogramImpl hist;
+
+  for (int it = 0; it < num_iter; it++) {
+    for (int i = 0; i < num_keys1; i++) {
+      for (int j = 0; j < num_keys2; j++) {
+        int r1 = rnd.Uniform(num_keys1) * 2;
+        int r2 = rnd.Uniform(num_keys2);
+        if (if_query_empty_keys) {
+          r1++;
+          r2 = num_keys2 * 2 - r2;
+        }
+
+        if (!for_iterator) {
+          // Query one existing key;
+          std::string key = MakeKey(r1, r2, through_db);
+          uint64_t start_time = Now(clock, measured_by_nanosecond);
+          if (!through_db) {
+            PinnableSlice value;
+            MergeContext merge_context;
+            SequenceNumber max_covering_tombstone_seq = 0;
+            GetContext get_context(
+                ioptions.user_comparator, ioptions.merge_operator.get(),
+                ioptions.logger, ioptions.stats, GetContext::kNotFound,
+                Slice(key), &value, /*columns=*/nullptr, /*timestamp=*/nullptr,
+                &merge_context, true, &max_covering_tombstone_seq, clock);
+            s = table_reader->Get(read_options, key, &get_context, nullptr);
+          } else {
+            s = db->Get(read_options, key, &result);
+          }
+          hist.Add(Now(clock, measured_by_nanosecond) - start_time);
+        } else {
+          int r2_len;
+          if (if_query_empty_keys) {
+            r2_len = 0;
+          } else {
+            r2_len = rnd.Uniform(num_keys2) + 1;
+            if (r2_len + r2 > num_keys2) {
+              r2_len = num_keys2 - r2;
+            }
+          }
+          std::string start_key = MakeKey(r1, r2, through_db);
+          std::string end_key = MakeKey(r1, r2 + r2_len, through_db);
+          uint64_t total_time = 0;
+          uint64_t start_time = Now(clock, measured_by_nanosecond);
+          Iterator* iter = nullptr;
+          InternalIterator* iiter = nullptr;
+          if (!through_db) {
+            iiter = table_reader->NewIterator(
+                read_options, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
+                /*skip_filters=*/false, TableReaderCaller::kUncategorized);
+          } else {
+            iter = db->NewIterator(read_options);
+          }
+          int count = 0;
+          for (through_db ? iter->Seek(start_key) : iiter->Seek(start_key);
+               through_db ? iter->Valid() : iiter->Valid();
+               through_db ? iter->Next() : iiter->Next()) {
+            if (if_query_empty_keys) {
+              break;
+            }
+            // verify key;
+            total_time += Now(clock, measured_by_nanosecond) - start_time;
+            assert(Slice(MakeKey(r1, r2 + count, through_db)) ==
+                   (through_db ? iter->key() : iiter->key()));
+            start_time = Now(clock, measured_by_nanosecond);
+            if (++count >= r2_len) {
+              break;
+            }
+          }
+          if (count != r2_len) {
+            fprintf(stderr,
+                    "Iterator cannot iterate expected number of entries. "
+                    "Expected %d but got %d\n",
+                    r2_len, count);
+            assert(false);
+          }
+          delete iter;
+          total_time += Now(clock, measured_by_nanosecond) - start_time;
+          hist.Add(total_time);
+        }
+      }
+    }
+  }
+
+  fprintf(
+      stderr,
+      "==================================================="
+      "====================================================\n"
+      "InMemoryTableSimpleBenchmark: %20s   num_key1:  %5d   "
+      "num_key2: %5d  %10s\n"
+      "==================================================="
+      "===================================================="
+      "\nHistogram (unit: %s): \n%s",
+      opts.table_factory->Name(), num_keys1, num_keys2,
+      for_iterator ? "iterator" : (if_query_empty_keys ? "empty" : "non_empty"),
+      measured_by_nanosecond ? "nanosecond" : "microsecond",
+      hist.ToString().c_str());
+  if (!through_db) {
+    env->DeleteFile(file_name);
+  } else {
+    delete db;
+    db = nullptr;
+    DestroyDB(dbname, opts);
+  }
+}
+}  // namespace
+}  // namespace ROCKSDB_NAMESPACE
+
+DEFINE_bool(query_empty, false,
+            "query non-existing keys instead of existing ones.");
+DEFINE_int32(num_keys1, 4096, "number of distinguish prefix of keys");
+DEFINE_int32(num_keys2, 512, "number of distinguish keys for each prefix");
+DEFINE_int32(iter, 3, "query non-existing keys instead of existing ones");
+DEFINE_int32(prefix_len, 16, "Prefix length used for iterators and indexes");
+DEFINE_bool(iterator, false, "For test iterator");
+DEFINE_bool(through_db, false,
+            "If enable, a DB instance will be created and the query will be "
+            "against DB. Otherwise, will be directly against a table reader.");
+DEFINE_bool(mmap_read, true, "Whether use mmap read");
+DEFINE_string(table_factory, "block_based",
+              "Table factory to use: `block_based` (default), `plain_table` or "
+              "`cuckoo_hash`.");
+DEFINE_string(time_unit, "microsecond",
+              "The time unit used for measuring performance. User can specify "
+              "`microsecond` (default) or `nanosecond`");
+
+int main(int argc, char** argv) {
+  SetUsageMessage(std::string("\nUSAGE:\n") + std::string(argv[0]) +
+                  " [OPTIONS]...");
+  ParseCommandLineFlags(&argc, &argv, true);
+
+  std::shared_ptr<ROCKSDB_NAMESPACE::TableFactory> tf;
+  ROCKSDB_NAMESPACE::Options options;
+  if (FLAGS_prefix_len < 16) {
+    options.prefix_extractor.reset(
+        ROCKSDB_NAMESPACE::NewFixedPrefixTransform(FLAGS_prefix_len));
+  }
+  ROCKSDB_NAMESPACE::ReadOptions ro;
+  ROCKSDB_NAMESPACE::EnvOptions env_options;
+  options.create_if_missing = true;
+  options.compression = ROCKSDB_NAMESPACE::CompressionType::kNoCompression;
+
+  if (FLAGS_table_factory == "cuckoo_hash") {
+#ifndef ROCKSDB_LITE
+    options.allow_mmap_reads = FLAGS_mmap_read;
+    env_options.use_mmap_reads = FLAGS_mmap_read;
+    ROCKSDB_NAMESPACE::CuckooTableOptions table_options;
+    table_options.hash_table_ratio = 0.75;
+    tf.reset(ROCKSDB_NAMESPACE::NewCuckooTableFactory(table_options));
+#else
+    fprintf(stderr, "Plain table is not supported in lite mode\n");
+    exit(1);
+#endif  // ROCKSDB_LITE
+  } else if (FLAGS_table_factory == "plain_table") {
+#ifndef ROCKSDB_LITE
+    options.allow_mmap_reads = FLAGS_mmap_read;
+    env_options.use_mmap_reads = FLAGS_mmap_read;
+
+    ROCKSDB_NAMESPACE::PlainTableOptions plain_table_options;
+    plain_table_options.user_key_len = 16;
+    plain_table_options.bloom_bits_per_key = (FLAGS_prefix_len == 16) ? 0 : 8;
+    plain_table_options.hash_table_ratio = 0.75;
+
+    tf.reset(new ROCKSDB_NAMESPACE::PlainTableFactory(plain_table_options));
+    options.prefix_extractor.reset(
+        ROCKSDB_NAMESPACE::NewFixedPrefixTransform(FLAGS_prefix_len));
+#else
+    fprintf(stderr, "Cuckoo table is not supported in lite mode\n");
+    exit(1);
+#endif  // ROCKSDB_LITE
+  } else if (FLAGS_table_factory == "block_based") {
+    tf.reset(new ROCKSDB_NAMESPACE::BlockBasedTableFactory());
+  } else {
+    fprintf(stderr, "Invalid table type %s\n", FLAGS_table_factory.c_str());
+  }
+
+  if (tf) {
+    // if user provides invalid options, just fall back to microsecond.
+    bool measured_by_nanosecond = FLAGS_time_unit == "nanosecond";
+
+    options.table_factory = tf;
+    ROCKSDB_NAMESPACE::TableReaderBenchmark(
+        options, env_options, ro, FLAGS_num_keys1, FLAGS_num_keys2, FLAGS_iter,
+        FLAGS_prefix_len, FLAGS_query_empty, FLAGS_iterator, FLAGS_through_db,
+        measured_by_nanosecond);
+  } else {
+    return 1;
+  }
+
+  return 0;
+}
+
+#endif  // GFLAGS