From 3725179736e2b5372664163470e7ef3dc76529a4 Mon Sep 17 00:00:00 2001 From: Sfan5 Date: Mon, 9 Sep 2013 22:46:18 +0200 Subject: Use system-wide LevelDB instead of bundled one --- src/leveldb/util/histogram.cc | 139 ------------------------------------------ 1 file changed, 139 deletions(-) delete mode 100644 src/leveldb/util/histogram.cc (limited to 'src/leveldb/util/histogram.cc') diff --git a/src/leveldb/util/histogram.cc b/src/leveldb/util/histogram.cc deleted file mode 100644 index bb95f583e..000000000 --- a/src/leveldb/util/histogram.cc +++ /dev/null @@ -1,139 +0,0 @@ -// 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 -#include -#include "port/port.h" -#include "util/histogram.h" - -namespace leveldb { - -const double Histogram::kBucketLimit[kNumBuckets] = { - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, - 50, 60, 70, 80, 90, 100, 120, 140, 160, 180, 200, 250, 300, 350, 400, 450, - 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, 2500, 3000, - 3500, 4000, 4500, 5000, 6000, 7000, 8000, 9000, 10000, 12000, 14000, - 16000, 18000, 20000, 25000, 30000, 35000, 40000, 45000, 50000, 60000, - 70000, 80000, 90000, 100000, 120000, 140000, 160000, 180000, 200000, - 250000, 300000, 350000, 400000, 450000, 500000, 600000, 700000, 800000, - 900000, 1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2500000, - 3000000, 3500000, 4000000, 4500000, 5000000, 6000000, 7000000, 8000000, - 9000000, 10000000, 12000000, 14000000, 16000000, 18000000, 20000000, - 25000000, 30000000, 35000000, 40000000, 45000000, 50000000, 60000000, - 70000000, 80000000, 90000000, 100000000, 120000000, 140000000, 160000000, - 180000000, 200000000, 250000000, 300000000, 350000000, 400000000, - 450000000, 500000000, 600000000, 700000000, 800000000, 900000000, - 1000000000, 1200000000, 1400000000, 1600000000, 1800000000, 2000000000, - 2500000000.0, 3000000000.0, 3500000000.0, 4000000000.0, 4500000000.0, - 5000000000.0, 6000000000.0, 7000000000.0, 8000000000.0, 9000000000.0, - 1e200, -}; - -void Histogram::Clear() { - min_ = kBucketLimit[kNumBuckets-1]; - max_ = 0; - num_ = 0; - sum_ = 0; - sum_squares_ = 0; - for (int i = 0; i < kNumBuckets; i++) { - buckets_[i] = 0; - } -} - -void Histogram::Add(double value) { - // Linear search is fast enough for our usage in db_bench - int b = 0; - while (b < kNumBuckets - 1 && kBucketLimit[b] <= value) { - b++; - } - buckets_[b] += 1.0; - if (min_ > value) min_ = value; - if (max_ < value) max_ = value; - num_++; - sum_ += value; - sum_squares_ += (value * value); -} - -void Histogram::Merge(const Histogram& other) { - if (other.min_ < min_) min_ = other.min_; - if (other.max_ > max_) max_ = other.max_; - num_ += other.num_; - sum_ += other.sum_; - sum_squares_ += other.sum_squares_; - for (int b = 0; b < kNumBuckets; b++) { - buckets_[b] += other.buckets_[b]; - } -} - -double Histogram::Median() const { - return Percentile(50.0); -} - -double Histogram::Percentile(double p) const { - double threshold = num_ * (p / 100.0); - double sum = 0; - for (int b = 0; b < kNumBuckets; b++) { - sum += buckets_[b]; - if (sum >= threshold) { - // Scale linearly within this bucket - double left_point = (b == 0) ? 0 : kBucketLimit[b-1]; - double right_point = kBucketLimit[b]; - double left_sum = sum - buckets_[b]; - double right_sum = sum; - double pos = (threshold - left_sum) / (right_sum - left_sum); - double r = left_point + (right_point - left_point) * pos; - if (r < min_) r = min_; - if (r > max_) r = max_; - return r; - } - } - return max_; -} - -double Histogram::Average() const { - if (num_ == 0.0) return 0; - return sum_ / num_; -} - -double Histogram::StandardDeviation() const { - if (num_ == 0.0) return 0; - double variance = (sum_squares_ * num_ - sum_ * sum_) / (num_ * num_); - return sqrt(variance); -} - -std::string Histogram::ToString() const { - std::string r; - char buf[200]; - snprintf(buf, sizeof(buf), - "Count: %.0f Average: %.4f StdDev: %.2f\n", - num_, Average(), StandardDeviation()); - r.append(buf); - snprintf(buf, sizeof(buf), - "Min: %.4f Median: %.4f Max: %.4f\n", - (num_ == 0.0 ? 0.0 : min_), Median(), max_); - r.append(buf); - r.append("------------------------------------------------------\n"); - const double mult = 100.0 / num_; - double sum = 0; - for (int b = 0; b < kNumBuckets; b++) { - if (buckets_[b] <= 0.0) continue; - sum += buckets_[b]; - snprintf(buf, sizeof(buf), - "[ %7.0f, %7.0f ) %7.0f %7.3f%% %7.3f%% ", - ((b == 0) ? 0.0 : kBucketLimit[b-1]), // left - kBucketLimit[b], // right - buckets_[b], // count - mult * buckets_[b], // percentage - mult * sum); // cumulative percentage - r.append(buf); - - // Add hash marks based on percentage; 20 marks for 100%. - int marks = static_cast(20*(buckets_[b] / num_) + 0.5); - r.append(marks, '#'); - r.push_back('\n'); - } - return r; -} - -} // namespace leveldb -- cgit v1.2.3