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From jianq...@apache.org
Subject [2/2] incubator-quickstep git commit: Atomic build bloom filters
Date Fri, 12 Aug 2016 08:46:01 GMT
Atomic build bloom filters


Project: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/commit/82e7efd9
Tree: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/tree/82e7efd9
Diff: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/diff/82e7efd9

Branch: refs/heads/LIP-for-tpch
Commit: 82e7efd939ed1f2a478389e6f83f38f59585ef81
Parents: 50c650b
Author: Jianqiao Zhu <jianqiao@cs.wisc.edu>
Authored: Fri Aug 12 03:26:29 2016 -0500
Committer: Jianqiao Zhu <jianqiao@cs.wisc.edu>
Committed: Fri Aug 12 03:26:29 2016 -0500

----------------------------------------------------------------------
 relational_operators/BuildHashOperator.cpp |   2 +-
 storage/BloomFilterIndexSubBlock.cpp       |  75 ++++++-----
 storage/HashTable.hpp                      |  67 +++-------
 utility/BloomFilter.hpp                    | 170 +++++++++---------------
 4 files changed, 119 insertions(+), 195 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/82e7efd9/relational_operators/BuildHashOperator.cpp
----------------------------------------------------------------------
diff --git a/relational_operators/BuildHashOperator.cpp b/relational_operators/BuildHashOperator.cpp
index b4e20e4..d9d2db2 100644
--- a/relational_operators/BuildHashOperator.cpp
+++ b/relational_operators/BuildHashOperator.cpp
@@ -144,7 +144,7 @@ serialization::WorkOrder* BuildHashOperator::createWorkOrderProto(const
block_id
 }
 
 void BuildHashOperator::actionOnCompletion() {
-  hash_table_->finalizeBuildSideThreadLocalBloomFilters();
+//  hash_table_->finalizeBuildSideThreadLocalBloomFilters();
 }
 
 void BuildHashWorkOrder::execute() {

http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/82e7efd9/storage/BloomFilterIndexSubBlock.cpp
----------------------------------------------------------------------
diff --git a/storage/BloomFilterIndexSubBlock.cpp b/storage/BloomFilterIndexSubBlock.cpp
index 6ba466e..fc3fb90 100644
--- a/storage/BloomFilterIndexSubBlock.cpp
+++ b/storage/BloomFilterIndexSubBlock.cpp
@@ -62,29 +62,30 @@ BloomFilterIndexSubBlock::BloomFilterIndexSubBlock(const TupleStorageSubBlock
&t
   CHECK(DescriptionIsValid(relation_, description_))
       << "Attempted to construct an BloomFilterIndexSubBlock from an invalid description.";
 
-  // Store the attribute ids that are being indexed.
-  indexed_attribute_ids_.reserve(description.indexed_attribute_ids_size());
-  for (int i = 0; i < description.indexed_attribute_ids_size(); ++i) {
-    indexed_attribute_ids_.push_back(description.indexed_attribute_ids(i));
-  }
-
-  // Make the bit_array_ point to sub_block_memory.
-  bit_array_.reset(static_cast<std::uint8_t*>(sub_block_memory));
-
-  bool is_bloom_filter_initialized = !is_new_block;
-  const std::uint32_t salt_count = description.GetExtension(BloomFilterIndexSubBlockDescription::number_of_hashes);
-
-  // Initialize the bloom_filter_ data structure to operate on bit_array.
-  bloom_filter_.reset(new BloomFilter(salt_count,
-                                      bit_array_size_in_bytes_,
-                                      bit_array_.get(),
-                                      is_bloom_filter_initialized));
-  is_initialized_ = true;
-  is_consistent_ = true;
+//  // Store the attribute ids that are being indexed.
+//  indexed_attribute_ids_.reserve(description.indexed_attribute_ids_size());
+//  for (int i = 0; i < description.indexed_attribute_ids_size(); ++i) {
+//    indexed_attribute_ids_.push_back(description.indexed_attribute_ids(i));
+//  }
+//
+//  // Make the bit_array_ point to sub_block_memory.
+//  bit_array_.reset(static_cast<std::uint8_t*>(sub_block_memory));
+//
+//  bool is_bloom_filter_initialized = !is_new_block;
+//  const std::uint32_t salt_count = description.GetExtension(BloomFilterIndexSubBlockDescription::number_of_hashes);
+//
+//  // Initialize the bloom_filter_ data structure to operate on bit_array.
+//  bloom_filter_.reset(new BloomFilter(salt_count,
+//                                      bit_array_size_in_bytes_,
+//                                      bit_array_.get(),
+//                                      is_bloom_filter_initialized));
+//  is_initialized_ = true;
+//  is_consistent_ = true;
+  LOG(FATAL) << "BloomFilterIndexSubBlock disabled";
 }
 
 BloomFilterIndexSubBlock::~BloomFilterIndexSubBlock() {
-  bit_array_.release();  // De-allocation of bit_array_ is handled by StorageBlock.
+//  bit_array_.release();  // De-allocation of bit_array_ is handled by StorageBlock.
 }
 
 bool BloomFilterIndexSubBlock::DescriptionIsValid(const CatalogRelationSchema &relation,
@@ -258,22 +259,24 @@ BloomFilterIndexSubBlock::BloomFilterSelectivity
 }
 
 bool BloomFilterIndexSubBlock::rebuild() {
-  DCHECK(is_initialized_);
-  bloom_filter_->reset();
-  bool didSucceed = true;
-  if (tuple_store_.isPacked()) {
-    for (tuple_id tid = 0; didSucceed && tid <= tuple_store_.getMaxTupleID();
++tid) {
-      didSucceed = addEntry(tid);
-    }
-  } else {
-    for (tuple_id tid = 0; didSucceed && tid <= tuple_store_.getMaxTupleID();
++tid) {
-      if (tuple_store_.hasTupleWithID(tid)) {
-        didSucceed = addEntry(tid);
-      }
-    }
-  }
-  is_consistent_ = true;
-  return didSucceed;
+//  DCHECK(is_initialized_);
+//  bloom_filter_->reset();
+//  bool didSucceed = true;
+//  if (tuple_store_.isPacked()) {
+//    for (tuple_id tid = 0; didSucceed && tid <= tuple_store_.getMaxTupleID();
++tid) {
+//      didSucceed = addEntry(tid);
+//    }
+//  } else {
+//    for (tuple_id tid = 0; didSucceed && tid <= tuple_store_.getMaxTupleID();
++tid) {
+//      if (tuple_store_.hasTupleWithID(tid)) {
+//        didSucceed = addEntry(tid);
+//      }
+//    }
+//  }
+//  is_consistent_ = true;
+//  return didSucceed;
+  LOG(FATAL) << "BloomFilterIndexSubBlock disabled";
+  return false;
 }
 
 }  // namespace quickstep

http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/82e7efd9/storage/HashTable.hpp
----------------------------------------------------------------------
diff --git a/storage/HashTable.hpp b/storage/HashTable.hpp
index 1caa183..9c50fc7 100644
--- a/storage/HashTable.hpp
+++ b/storage/HashTable.hpp
@@ -38,7 +38,6 @@
 #include "storage/TupleReference.hpp"
 #include "storage/ValueAccessor.hpp"
 #include "storage/ValueAccessorUtil.hpp"
-#include "threading/Mutex.hpp"
 #include "threading/SpinSharedMutex.hpp"
 #include "types/Type.hpp"
 #include "types/TypedValue.hpp"
@@ -1031,16 +1030,16 @@ class HashTable : public HashTableBase<resizable,
     build_attribute_ids_.push_back(build_attribute_id);
   }
 
-  inline void finalizeBuildSideThreadLocalBloomFilters() {
-    if (has_build_side_bloom_filter_) {
-      for (const auto &thread_local_bf_pair : thread_local_bloom_filters_) {
-        for (std::size_t i = 0; i < build_bloom_filters_.size(); ++i) {
-          build_bloom_filters_[i]->bitwiseOr(
-              thread_local_bf_pair.second[i].get());
-        }
-      }
-    }
-  }
+//  inline void finalizeBuildSideThreadLocalBloomFilters() {
+//    if (has_build_side_bloom_filter_) {
+//      for (const auto &thread_local_bf_pair : thread_local_bloom_filters_) {
+//        for (std::size_t i = 0; i < build_bloom_filters_.size(); ++i) {
+//          build_bloom_filters_[i]->bitwiseOr(
+//              thread_local_bf_pair.second[i].get());
+//        }
+//      }
+//    }
+//  }
 
   /**
    * @brief This function adds a pointer to the list of bloom filters to be
@@ -1352,8 +1351,6 @@ class HashTable : public HashTableBase<resizable,
   bool has_build_side_bloom_filter_ = false;
   bool has_probe_side_bloom_filter_ = false;
   std::vector<BloomFilter *> build_bloom_filters_;
-  std::map<std::thread::id, std::vector<std::unique_ptr<BloomFilter>>>
thread_local_bloom_filters_;
-  Mutex bloom_filter_mutex_;
   std::vector<attribute_id> build_attribute_ids_;
   std::vector<const BloomFilter*> probe_bloom_filters_;
   std::vector<attribute_id> probe_attribute_ids_;
@@ -1503,20 +1500,9 @@ HashTablePutResult HashTable<ValueT, resizable, serializable, force_key_copy,
al
       }
     }
 
-    BloomFilter *thread_local_bloom_filter = nullptr;
+    BloomFilter *bloom_filter = nullptr;
     if (has_build_side_bloom_filter_) {
-      const auto tid = std::this_thread::get_id();
-      MutexLock lock(bloom_filter_mutex_);
-      auto bf_it = thread_local_bloom_filters_.find(tid);
-      if (bf_it == thread_local_bloom_filters_.end()) {
-        auto &bf_vector = thread_local_bloom_filters_[tid];
-        bf_vector.emplace_back(
-            std::make_unique<BloomFilter>(build_bloom_filters_[0]->getNumberOfHashes(),
-                                          build_bloom_filters_[0]->getBitArraySize()));
-        thread_local_bloom_filter = bf_vector[0].get();
-      } else {
-        thread_local_bloom_filter = bf_it->second[0].get();
-      }
+      bloom_filter = build_bloom_filters_[0];
     }
 
     if (resizable) {
@@ -1536,8 +1522,8 @@ HashTablePutResult HashTable<ValueT, resizable, serializable, force_key_copy,
al
                                        using_prealloc ? &prealloc_state : nullptr);
             // Insert into bloom filter, if enabled.
             if (has_build_side_bloom_filter_) {
-              thread_local_bloom_filter->insertUnSafe(static_cast<const std::uint8_t
*>(key.getDataPtr()),
-                                                      key.getDataSize());
+              bloom_filter->insert(static_cast<const std::uint8_t *>(key.getDataPtr()),
+                                   key.getDataSize());
             }
             if (result == HashTablePutResult::kDuplicateKey) {
               DEBUG_ASSERT(!using_prealloc);
@@ -1566,8 +1552,8 @@ HashTablePutResult HashTable<ValueT, resizable, serializable, force_key_copy,
al
                                    using_prealloc ? &prealloc_state : nullptr);
         // Insert into bloom filter, if enabled.
         if (has_build_side_bloom_filter_) {
-          thread_local_bloom_filter->insertUnSafe(static_cast<const std::uint8_t *>(key.getDataPtr()),
-                                                  key.getDataSize());
+          bloom_filter->insert(static_cast<const std::uint8_t *>(key.getDataPtr()),
+                               key.getDataSize());
         }
         if (result != HashTablePutResult::kOK) {
           return result;
@@ -1641,30 +1627,13 @@ HashTablePutResult HashTable<ValueT, resizable, serializable, force_key_copy,
al
     }
 
     if (has_build_side_bloom_filter_) {
-      const auto tid = std::this_thread::get_id();
-      std::vector<std::unique_ptr<BloomFilter>> *thread_local_bf_vector;
-      {
-        MutexLock lock(bloom_filter_mutex_);
-        auto bf_it = thread_local_bloom_filters_.find(tid);
-        if (bf_it == thread_local_bloom_filters_.end()) {
-          thread_local_bf_vector = &thread_local_bloom_filters_[tid];
-          for (const auto &build_side_bf : build_bloom_filters_) {
-            thread_local_bf_vector->emplace_back(
-                std::make_unique<BloomFilter>(build_side_bf->getNumberOfHashes(),
-                                              build_side_bf->getBitArraySize()));
-          }
-        } else {
-          thread_local_bf_vector = &bf_it->second;
-        }
-      }
-
       for (std::size_t i = 0; i < build_bloom_filters_.size(); ++i) {
         const auto &build_attr = build_attribute_ids_[i];
-        BloomFilter *thread_local_bloom_filter = (*thread_local_bf_vector)[i].get();
+        BloomFilter *bloom_filter = build_bloom_filters_[i];
         const std::size_t attr_size =
             accessor->template getUntypedValueAndByteLengthAtAbsolutePosition<false>(0,
build_attr).second;
         while (accessor->next()) {
-          thread_local_bloom_filter->insertUnSafe(
+          bloom_filter->insert(
               static_cast<const std::uint8_t *>(accessor->getUntypedValue(build_attr)),
               attr_size);
         }

http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/82e7efd9/utility/BloomFilter.hpp
----------------------------------------------------------------------
diff --git a/utility/BloomFilter.hpp b/utility/BloomFilter.hpp
index 749d33a..5b87c2d 100644
--- a/utility/BloomFilter.hpp
+++ b/utility/BloomFilter.hpp
@@ -21,6 +21,7 @@
 #define QUICKSTEP_UTILITY_BLOOM_FILTER_HPP
 
 #include <algorithm>
+#include <atomic>
 #include <cstddef>
 #include <cstdint>
 #include <cstring>
@@ -100,36 +101,13 @@ class BloomFilterBlocked {
    * @param bit_array_size_in_bytes Size of the bit array.
    **/
   BloomFilterBlocked(const std::uint8_t hash_fn_count,
-              const std::uint64_t bit_array_size_in_bytes)
+                     const std::uint64_t bit_array_size_in_bytes)
       : hash_fn_count_(hash_fn_count),
         array_size_in_bytes_(getNearestAllowedSize(bit_array_size_in_bytes)),
-        is_bit_array_owner_(true),
-        bit_array_(new std::uint8_t[array_size_in_bytes_]) {
-    reset();
-  }
-
-  /**
-   * @brief Constructor.
-   * @note When a bit_array is passed as an argument to the constructor,
-   *       then the ownership of the bit array lies with the caller.
-   *
-   * @param hash_fn_count The number of hash functions used by this bloom filter.
-   * @param bit_array_size_in_bytes Size of the bit array.
-   * @param bit_array A pointer to the memory region that is used to store bit array.
-   * @param is_initialized A boolean that indicates whether to zero-out the region
-   *                       before use or not.
-   **/
-  BloomFilterBlocked(const std::uint8_t hash_fn_count,
-              const std::uint64_t bit_array_size_in_bytes,
-              std::uint8_t *bit_array,
-              const bool is_initialized)
-      : hash_fn_count_(hash_fn_count),
-        array_size_in_bytes_(getNearestAllowedSize(bit_array_size_in_bytes, true)),
-        is_bit_array_owner_(false),
-        bit_array_(bit_array) {  // Owned by the calling method.
-    if (!is_initialized) {
-      reset();
-    }
+        bit_array_(bit_array_size_in_bytes) {
+    std::memset(bit_array_.data(),
+                0x0,
+                sizeof(std::atomic<std::uint8_t>) * bit_array_size_in_bytes);
   }
 
   /**
@@ -141,22 +119,14 @@ class BloomFilterBlocked {
    *        bloom filter configuration.
    **/
   explicit BloomFilterBlocked(const serialization::BloomFilter &bloom_filter_proto)
-      : hash_fn_count_(bloom_filter_proto.number_of_hashes()),
-        array_size_in_bytes_(bloom_filter_proto.bloom_filter_size()),
-        is_bit_array_owner_(true),
-        bit_array_(new std::uint8_t[array_size_in_bytes_]) {
-    reset();
+      : BloomFilterBlocked(bloom_filter_proto.number_of_hashes(),
+                           bloom_filter_proto.bloom_filter_size()) {
   }
 
   /**
    * @brief Destructor.
    **/
   ~BloomFilterBlocked() {
-    if (is_bit_array_owner_) {
-      bit_array_.reset();
-    } else {
-      bit_array_.release();
-    }
   }
 
   static bool ProtoIsValid(const serialization::BloomFilter &bloom_filter_proto) {
@@ -164,15 +134,6 @@ class BloomFilterBlocked {
   }
 
   /**
-   * @brief Zeros out the contents of the bit array.
-   **/
-  inline void reset() {
-    // Initialize the bit_array with all zeros.
-    std::fill_n(bit_array_.get(), array_size_in_bytes_, 0x00);
-    inserted_element_count_ = 0;
-  }
-
-  /**
    * @brief Get the number of hash functions used in this bloom filter.
    *
    * @return Returns the number of hash functions.
@@ -190,18 +151,9 @@ class BloomFilterBlocked {
     return array_size_in_bytes_;
   }
 
-  /**
-   * @brief Get the constant pointer to the bit array for this bloom filter
-   *
-   * @return Returns constant pointer to the bit array.
-   **/
-  inline const std::uint8_t* getBitArray() const {
-    return bit_array_.get();
-  }
-
   template <typename T>
-  void insert(const T &value) {
-    insert(reinterpret_cast<const std::uint8_t *>(&value), sizeof(T));
+  inline void insert(const T &value) {
+    insert(reinterpret_cast<const std::uint8_t*>(&value), sizeof(T));
   }
 
   /**
@@ -211,14 +163,14 @@ class BloomFilterBlocked {
    * @param length Size of the value being inserted in bytes.
    */
   inline void insert(const std::uint8_t *key_begin, const std::size_t length) {
-      SpinSharedMutexExclusiveLock<false> exclusive_writer_lock(bloom_filter_insert_mutex_);
-      insertUnSafe(key_begin, length);
+    const std::uint32_t pos = hash_identity(key_begin, length);
+    bit_array_[pos >> 3].fetch_or(1 << (pos & 0x7), std::memory_order_relaxed);
   }
 
-  template <typename T>
-  void insertUnSafe(const T &value) {
-    insertUnSafe(reinterpret_cast<const std::uint8_t *>(&value), sizeof(T));
-  }
+//  template <typename T>
+//  void insertUnSafe(const T &value) {
+//    insertUnSafe(reinterpret_cast<const std::uint8_t *>(&value), sizeof(T));
+//  }
 
   /**
    * @brief Inserts a given value into the bloom filter.
@@ -228,16 +180,16 @@ class BloomFilterBlocked {
    * @param key_begin A pointer to the value being inserted.
    * @param length Size of the value being inserted in bytes.
    */
-  inline void insertUnSafe(const std::uint8_t *key_begin, const std::size_t length) {
-    Position first_pos = getFirstPosition(key_begin, length);
-    setBitAtPosition(first_pos);
-    Position other_pos;
-    for (std::uint8_t i = 1; i <hash_fn_count_; ++i) {
-      other_pos = getOtherPosition(key_begin, length, first_pos, i);
-      setBitAtPosition(other_pos);
-    }
-    ++inserted_element_count_;
-  }
+//  inline void insertUnSafe(const std::uint8_t *key_begin, const std::size_t length) {
+//    Position first_pos = getFirstPosition(key_begin, length);
+//    setBitAtPosition(first_pos);
+//    Position other_pos;
+//    for (std::uint8_t i = 1; i <hash_fn_count_; ++i) {
+//      other_pos = getOtherPosition(key_begin, length, first_pos, i);
+//      setBitAtPosition(other_pos);
+//    }
+//    ++inserted_element_count_;
+//  }
 
   template <typename T>
   bool contains(const T &value) {
@@ -258,18 +210,20 @@ class BloomFilterBlocked {
   inline bool contains(
       const std::uint8_t *__restrict__ key_begin,
       const std::size_t length) const {
-    Position first_pos = getFirstPosition(key_begin, length);
-    if (!getBitAtPosition(first_pos)) {
-      return false;
-    }
-    Position other_pos;
-    for (std::uint8_t i = 1; i < hash_fn_count_; ++i) {
-      other_pos = getOtherPosition(key_begin, length, first_pos, i);
-      if (!getBitAtPosition(other_pos)) {
-        return false;
-      }
-    }
-    return true;
+//    Position first_pos = getFirstPosition(key_begin, length);
+//    if (!getBitAtPosition(first_pos)) {
+//      return false;
+//    }
+//    Position other_pos;
+//    for (std::uint8_t i = 1; i < hash_fn_count_; ++i) {
+//      other_pos = getOtherPosition(key_begin, length, first_pos, i);
+//      if (!getBitAtPosition(other_pos)) {
+//        return false;
+//      }
+//    }
+//    return true;
+    const std::uint32_t pos = hash_identity(key_begin, length);
+    return ((bit_array_[pos >> 3].load(std::memory_order_relaxed) & (1 <<
(pos & 0x7))) > 0);
   }
 
   /**
@@ -278,21 +232,21 @@ class BloomFilterBlocked {
    *
    * @param bloom_filter A const pointer to the bloom filter object to do bitwise-OR with.
    */
-  inline void bitwiseOr(const BloomFilterBlocked *bloom_filter) {
-    SpinSharedMutexExclusiveLock<false> exclusive_writer_lock(bloom_filter_insert_mutex_);
-    for (std::size_t byte_index = 0; byte_index < bloom_filter->getBitArraySize();
++byte_index) {
-      (bit_array_.get())[byte_index] |= bloom_filter->getBitArray()[byte_index];
-    }
-  }
+//  inline void bitwiseOr(const BloomFilterBlocked *bloom_filter) {
+//    SpinSharedMutexExclusiveLock<false> exclusive_writer_lock(bloom_filter_insert_mutex_);
+//    for (std::size_t byte_index = 0; byte_index < bloom_filter->getBitArraySize();
++byte_index) {
+//      (bit_array_.get())[byte_index] |= bloom_filter->getBitArray()[byte_index];
+//    }
+//  }
 
   /**
    * @brief Return the number of elements currently inserted into bloom filter.
    *
    * @return The number of elements inserted into bloom filter.
    **/
-  inline std::uint32_t element_count() const {
-    return inserted_element_count_;
-  }
+//  inline std::uint32_t element_count() const {
+//    return inserted_element_count_;
+//  }
 
  protected:
   Position getFirstPosition(const std::uint8_t *begin, std::size_t length) const {
@@ -325,23 +279,23 @@ class BloomFilterBlocked {
     }
   }
 
-  void setBitAtPosition(const Position &pos) {
-    (bit_array_.get())[pos.byte_pos.byte_num] |= (1 << pos.byte_pos.index_in_byte);
-  }
-
-  bool getBitAtPosition(const Position &pos) const {
-    return (bit_array_.get())[pos.byte_pos.byte_num] & (1 << pos.byte_pos.index_in_byte);
-  }
+//  inline void setBitAtPosition(const Position &pos) {
+//    (bit_array_.get())[pos.byte_pos.byte_num] |= (1 << pos.byte_pos.index_in_byte);
+//  }
+//
+//  inline bool getBitAtPosition(const Position &pos) const {
+//    return (bit_array_.get())[pos.byte_pos.byte_num] & (1 << pos.byte_pos.index_in_byte);
+//  }
 
   inline std::uint32_t hash_identity(
       const std::uint8_t *__restrict__ begin,
-      std::size_t length) const {
+      const std::size_t length) const {
     std::uint32_t hash;
     if (length >= 4)
-      hash = *reinterpret_cast<const std::uint32_t*> (begin);
+      hash = *reinterpret_cast<const std::uint32_t*>(begin);
     else
       std::memcpy(&hash, begin, length);
-    return hash % (array_size_in_bytes_ * kNumBitsPerByte);
+    return hash % (array_size_in_bytes_ << 3);
   }
 
   inline std::uint32_t hash_multiplicative(
@@ -368,8 +322,7 @@ class BloomFilterBlocked {
  private:
   const std::uint32_t hash_fn_count_;
   const std::uint64_t array_size_in_bytes_;
-  std::uint32_t inserted_element_count_;
-  const bool is_bit_array_owner_;
+//  std::uint32_t inserted_element_count_;
 
   static constexpr std::uint64_t kKnuthGoldenRatioNumber = 2654435761;
   const std::uint64_t hash_fn_[kMaxNumHashFns] = { // hash_fn_[i] is 2**(i+1) - 1
@@ -383,8 +336,7 @@ class BloomFilterBlocked {
     // 0x1fffffff * kKnuthGoldenRatioNumber  // 0x3fffffff, 0x7fffffff, 0xffffffff
     };
 
-  alignas(kCacheLineBytes) std::unique_ptr<std::uint8_t> bit_array_;
-  alignas(kCacheLineBytes) mutable SpinSharedMutex<false> bloom_filter_insert_mutex_;
+  alignas(kCacheLineBytes) std::vector<std::atomic<std::uint8_t>> bit_array_;
 
   DISALLOW_COPY_AND_ASSIGN(BloomFilterBlocked);
 };


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