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Revision cf98df34c1f812ed6c285110dceb5558f1ced92f authored by Maysam Yabandeh on 20 February 2019, 03:55:30 UTC, committed by Facebook Github Bot on 20 February 2019, 03:58:55 UTC 
Change random seed for txn stress tests on each run (#5004)
 
Summary:
Currently the transaction stress tests use thread id as the seed. Since the thread ids are likely to be the same across multiple runs, the seed is thus going to be the same. The patch includes time in calculating the seed to help covering a very different part of state space in each run of the stress tests. To be able to reproduce the bug in case the stress tests failed, it also prints out the time that was used to calculate the seed value.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5004

Differential Revision: D14144356

Pulled By: maysamyabandeh

fbshipit-source-id: 728ed522f550fc8b4f5f9f373259c05fe9a54556
1 parent 0f4244f
Raw File
alloc_tracker.cc 
//  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).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.

#include <assert.h>
#include "rocksdb/write_buffer_manager.h"
#include "util/allocator.h"
#include "util/arena.h"

namespace rocksdb {

AllocTracker::AllocTracker(WriteBufferManager* write_buffer_manager)
    : write_buffer_manager_(write_buffer_manager),
      bytes_allocated_(0),
      done_allocating_(false),
      freed_(false) {}

AllocTracker::~AllocTracker() { FreeMem(); }

void AllocTracker::Allocate(size_t bytes) {
  assert(write_buffer_manager_ != nullptr);
  if (write_buffer_manager_->enabled() ||
      write_buffer_manager_->cost_to_cache()) {
    bytes_allocated_.fetch_add(bytes, std::memory_order_relaxed);
    write_buffer_manager_->ReserveMem(bytes);
  }
}

void AllocTracker::DoneAllocating() {
  if (write_buffer_manager_ != nullptr && !done_allocating_) {
    if (write_buffer_manager_->enabled() ||
        write_buffer_manager_->cost_to_cache()) {
      write_buffer_manager_->ScheduleFreeMem(
          bytes_allocated_.load(std::memory_order_relaxed));
    } else {
      assert(bytes_allocated_.load(std::memory_order_relaxed) == 0);
    }
    done_allocating_ = true;
  }
}

void AllocTracker::FreeMem() {
  if (!done_allocating_) {
    DoneAllocating();
  }
  if (write_buffer_manager_ != nullptr && !freed_) {
    if (write_buffer_manager_->enabled() ||
        write_buffer_manager_->cost_to_cache()) {
      write_buffer_manager_->FreeMem(
          bytes_allocated_.load(std::memory_order_relaxed));
    } else {
      assert(bytes_allocated_.load(std::memory_order_relaxed) == 0);
    }
    freed_ = true;
  }
}
}  // namespace rocksdb
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