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Revision fa29f82548758e89236b45c44ba7aebe2ec907df authored by Mark Callaghan on 14 September 2012, 19:18:36 UTC, committed by Mark Callaghan on 14 September 2012, 19:45:42 UTC 
scan a long for FLAGS_cache_size to fix a compiler warning
 
Summary:
FLAGS_cache_size is a long, no need to scan %lld into a size_t
for it (which generates a compiler warning)

Test Plan: run db_bench

Reviewers: dhruba, heyongqiang

Reviewed By: heyongqiang

CC: heyongqiang

Differential Revision: https://reviews.facebook.net/D5427
1 parent 8371139
Raw File
histogram.h 
// 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.

#ifndef STORAGE_LEVELDB_UTIL_HISTOGRAM_H_
#define STORAGE_LEVELDB_UTIL_HISTOGRAM_H_

#include <string>

namespace leveldb {

class Histogram {
 public:
  Histogram() { }
  ~Histogram() { }

  void Clear();
  void Add(double value);
  void Merge(const Histogram& other);

  std::string ToString() const;

 private:
  double min_;
  double max_;
  double num_;
  double sum_;
  double sum_squares_;

  enum { kNumBuckets = 154 };
  static const double kBucketLimit[kNumBuckets];
  double buckets_[kNumBuckets];

  double Median() const;
  double Percentile(double p) const;
  double Average() const;
  double StandardDeviation() const;
};

}  // namespace leveldb

#endif  // STORAGE_LEVELDB_UTIL_HISTOGRAM_H_
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