Adding upstream version 18.2.2.upstream/18.2.2

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

1 files changed, 280 insertions, 0 deletions

diff --git a/src/rocksdb/db/range_del_aggregator_bench.cc b/src/rocksdb/db/range_del_aggregator_bench.cc
new file mode 100644
index 000000000..9dca707e5
--- /dev/null
+++ b/src/rocksdb/db/range_del_aggregator_bench.cc
@@ -0,0 +1,280 @@
+//  Copyright (c) 2018-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 <iomanip>
+#include <iostream>
+#include <memory>
+#include <random>
+#include <set>
+#include <string>
+#include <vector>
+
+#include "db/dbformat.h"
+#include "db/range_del_aggregator.h"
+#include "db/range_tombstone_fragmenter.h"
+#include "rocksdb/comparator.h"
+#include "rocksdb/system_clock.h"
+#include "util/coding.h"
+#include "util/gflags_compat.h"
+#include "util/random.h"
+#include "util/stop_watch.h"
+#include "util/vector_iterator.h"
+
+using GFLAGS_NAMESPACE::ParseCommandLineFlags;
+
+DEFINE_int32(num_range_tombstones, 1000, "number of range tombstones created");
+
+DEFINE_int32(num_runs, 1000, "number of test runs");
+
+DEFINE_int32(tombstone_start_upper_bound, 1000,
+             "exclusive upper bound on range tombstone start keys");
+
+DEFINE_int32(should_delete_upper_bound, 1000,
+             "exclusive upper bound on keys passed to ShouldDelete");
+
+DEFINE_double(tombstone_width_mean, 100.0, "average range tombstone width");
+
+DEFINE_double(tombstone_width_stddev, 0.0,
+              "standard deviation of range tombstone width");
+
+DEFINE_int32(seed, 0, "random number generator seed");
+
+DEFINE_int32(should_deletes_per_run, 1, "number of ShouldDelete calls per run");
+
+DEFINE_int32(add_tombstones_per_run, 1,
+             "number of AddTombstones calls per run");
+
+DEFINE_bool(use_compaction_range_del_aggregator, false,
+            "Whether to use CompactionRangeDelAggregator. Default is to use "
+            "ReadRangeDelAggregator.");
+
+namespace {
+
+struct Stats {
+  uint64_t time_add_tombstones = 0;
+  uint64_t time_first_should_delete = 0;
+  uint64_t time_rest_should_delete = 0;
+  uint64_t time_fragment_tombstones = 0;
+};
+
+std::ostream& operator<<(std::ostream& os, const Stats& s) {
+  std::ios fmt_holder(nullptr);
+  fmt_holder.copyfmt(os);
+
+  os << std::left;
+  os << std::setw(25) << "Fragment Tombstones: "
+     << s.time_fragment_tombstones /
+            (FLAGS_add_tombstones_per_run * FLAGS_num_runs * 1.0e3)
+     << " us\n";
+  os << std::setw(25) << "AddTombstones: "
+     << s.time_add_tombstones /
+            (FLAGS_add_tombstones_per_run * FLAGS_num_runs * 1.0e3)
+     << " us\n";
+  os << std::setw(25) << "ShouldDelete (first): "
+     << s.time_first_should_delete / (FLAGS_num_runs * 1.0e3) << " us\n";
+  if (FLAGS_should_deletes_per_run > 1) {
+    os << std::setw(25) << "ShouldDelete (rest): "
+       << s.time_rest_should_delete /
+              ((FLAGS_should_deletes_per_run - 1) * FLAGS_num_runs * 1.0e3)
+       << " us\n";
+  }
+
+  os.copyfmt(fmt_holder);
+  return os;
+}
+
+auto icmp = ROCKSDB_NAMESPACE::InternalKeyComparator(
+    ROCKSDB_NAMESPACE::BytewiseComparator());
+
+}  // anonymous namespace
+
+namespace ROCKSDB_NAMESPACE {
+
+namespace {
+
+// A wrapper around RangeTombstones and the underlying data of its start and end
+// keys.
+struct PersistentRangeTombstone {
+  std::string start_key;
+  std::string end_key;
+  RangeTombstone tombstone;
+
+  PersistentRangeTombstone(std::string start, std::string end,
+                           SequenceNumber seq)
+      : start_key(std::move(start)), end_key(std::move(end)) {
+    tombstone = RangeTombstone(start_key, end_key, seq);
+  }
+
+  PersistentRangeTombstone() = default;
+
+  PersistentRangeTombstone(const PersistentRangeTombstone& t) { *this = t; }
+
+  PersistentRangeTombstone& operator=(const PersistentRangeTombstone& t) {
+    start_key = t.start_key;
+    end_key = t.end_key;
+    tombstone = RangeTombstone(start_key, end_key, t.tombstone.seq_);
+
+    return *this;
+  }
+
+  PersistentRangeTombstone(PersistentRangeTombstone&& t) noexcept { *this = t; }
+
+  PersistentRangeTombstone& operator=(PersistentRangeTombstone&& t) {
+    start_key = std::move(t.start_key);
+    end_key = std::move(t.end_key);
+    tombstone = RangeTombstone(start_key, end_key, t.tombstone.seq_);
+
+    return *this;
+  }
+};
+
+struct TombstoneStartKeyComparator {
+  explicit TombstoneStartKeyComparator(const Comparator* c) : cmp(c) {}
+
+  bool operator()(const RangeTombstone& a, const RangeTombstone& b) const {
+    return cmp->Compare(a.start_key_, b.start_key_) < 0;
+  }
+
+  const Comparator* cmp;
+};
+
+std::unique_ptr<InternalIterator> MakeRangeDelIterator(
+    const std::vector<PersistentRangeTombstone>& range_dels) {
+  std::vector<std::string> keys, values;
+  for (const auto& range_del : range_dels) {
+    auto key_and_value = range_del.tombstone.Serialize();
+    keys.push_back(key_and_value.first.Encode().ToString());
+    values.push_back(key_and_value.second.ToString());
+  }
+  return std::unique_ptr<VectorIterator>(
+      new VectorIterator(keys, values, &icmp));
+}
+
+// convert long to a big-endian slice key
+static std::string Key(int64_t val) {
+  std::string little_endian_key;
+  std::string big_endian_key;
+  PutFixed64(&little_endian_key, val);
+  assert(little_endian_key.size() == sizeof(val));
+  big_endian_key.resize(sizeof(val));
+  for (size_t i = 0; i < sizeof(val); ++i) {
+    big_endian_key[i] = little_endian_key[sizeof(val) - 1 - i];
+  }
+  return big_endian_key;
+}
+
+}  // anonymous namespace
+
+}  // namespace ROCKSDB_NAMESPACE
+
+int main(int argc, char** argv) {
+  ParseCommandLineFlags(&argc, &argv, true);
+
+  Stats stats;
+  ROCKSDB_NAMESPACE::SystemClock* clock =
+      ROCKSDB_NAMESPACE::SystemClock::Default().get();
+  ROCKSDB_NAMESPACE::Random64 rnd(FLAGS_seed);
+  std::default_random_engine random_gen(FLAGS_seed);
+  std::normal_distribution<double> normal_dist(FLAGS_tombstone_width_mean,
+                                               FLAGS_tombstone_width_stddev);
+  std::vector<std::vector<ROCKSDB_NAMESPACE::PersistentRangeTombstone> >
+      all_persistent_range_tombstones(FLAGS_add_tombstones_per_run);
+  for (int i = 0; i < FLAGS_add_tombstones_per_run; i++) {
+    all_persistent_range_tombstones[i] =
+        std::vector<ROCKSDB_NAMESPACE::PersistentRangeTombstone>(
+            FLAGS_num_range_tombstones);
+  }
+  auto mode = ROCKSDB_NAMESPACE::RangeDelPositioningMode::kForwardTraversal;
+  std::vector<ROCKSDB_NAMESPACE::SequenceNumber> snapshots{0};
+  for (int i = 0; i < FLAGS_num_runs; i++) {
+    std::unique_ptr<ROCKSDB_NAMESPACE::RangeDelAggregator> range_del_agg =
+        nullptr;
+    if (FLAGS_use_compaction_range_del_aggregator) {
+      range_del_agg.reset(new ROCKSDB_NAMESPACE::CompactionRangeDelAggregator(
+          &icmp, snapshots));
+    } else {
+      range_del_agg.reset(new ROCKSDB_NAMESPACE::ReadRangeDelAggregator(
+          &icmp, ROCKSDB_NAMESPACE::kMaxSequenceNumber /* upper_bound */));
+    }
+
+    std::vector<
+        std::unique_ptr<ROCKSDB_NAMESPACE::FragmentedRangeTombstoneList> >
+        fragmented_range_tombstone_lists(FLAGS_add_tombstones_per_run);
+
+    for (auto& persistent_range_tombstones : all_persistent_range_tombstones) {
+      // TODO(abhimadan): consider whether creating the range tombstones right
+      // before AddTombstones is artificially warming the cache compared to
+      // real workloads.
+      for (int j = 0; j < FLAGS_num_range_tombstones; j++) {
+        uint64_t start = rnd.Uniform(FLAGS_tombstone_start_upper_bound);
+        uint64_t end = static_cast<uint64_t>(
+            std::round(start + std::max(1.0, normal_dist(random_gen))));
+        persistent_range_tombstones[j] =
+            ROCKSDB_NAMESPACE::PersistentRangeTombstone(
+                ROCKSDB_NAMESPACE::Key(start), ROCKSDB_NAMESPACE::Key(end), j);
+      }
+      auto iter =
+          ROCKSDB_NAMESPACE::MakeRangeDelIterator(persistent_range_tombstones);
+      ROCKSDB_NAMESPACE::StopWatchNano stop_watch_fragment_tombstones(
+          clock, true /* auto_start */);
+      fragmented_range_tombstone_lists.emplace_back(
+          new ROCKSDB_NAMESPACE::FragmentedRangeTombstoneList(
+              std::move(iter), icmp, FLAGS_use_compaction_range_del_aggregator,
+              snapshots));
+      stats.time_fragment_tombstones +=
+          stop_watch_fragment_tombstones.ElapsedNanos();
+      std::unique_ptr<ROCKSDB_NAMESPACE::FragmentedRangeTombstoneIterator>
+          fragmented_range_del_iter(
+              new ROCKSDB_NAMESPACE::FragmentedRangeTombstoneIterator(
+                  fragmented_range_tombstone_lists.back().get(), icmp,
+                  ROCKSDB_NAMESPACE::kMaxSequenceNumber));
+
+      ROCKSDB_NAMESPACE::StopWatchNano stop_watch_add_tombstones(
+          clock, true /* auto_start */);
+      range_del_agg->AddTombstones(std::move(fragmented_range_del_iter));
+      stats.time_add_tombstones += stop_watch_add_tombstones.ElapsedNanos();
+    }
+
+    ROCKSDB_NAMESPACE::ParsedInternalKey parsed_key;
+    parsed_key.sequence = FLAGS_num_range_tombstones / 2;
+    parsed_key.type = ROCKSDB_NAMESPACE::kTypeValue;
+
+    uint64_t first_key = rnd.Uniform(FLAGS_should_delete_upper_bound -
+                                     FLAGS_should_deletes_per_run + 1);
+
+    for (int j = 0; j < FLAGS_should_deletes_per_run; j++) {
+      std::string key_string = ROCKSDB_NAMESPACE::Key(first_key + j);
+      parsed_key.user_key = key_string;
+
+      ROCKSDB_NAMESPACE::StopWatchNano stop_watch_should_delete(
+          clock, true /* auto_start */);
+      range_del_agg->ShouldDelete(parsed_key, mode);
+      uint64_t call_time = stop_watch_should_delete.ElapsedNanos();
+
+      if (j == 0) {
+        stats.time_first_should_delete += call_time;
+      } else {
+        stats.time_rest_should_delete += call_time;
+      }
+    }
+  }
+
+  std::cout << "=========================\n"
+            << "Results:\n"
+            << "=========================\n"
+            << stats;
+
+  return 0;
+}
+
+#endif  // GFLAGS