The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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88 lines
2.3 KiB
88 lines
2.3 KiB
#!/usr/bin/env ruby |
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# Copyright 2016 gRPC authors. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# Histogram class for use in performance testing and measurement |
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require 'thread' |
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class Histogram |
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# Determine the bucket index for a given value |
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# @param {number} value The value to check |
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# @return {number} The bucket index |
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def bucket_for(value) |
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(Math.log(value)/Math.log(@multiplier)).to_i |
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end |
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# Initialize an empty histogram |
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# @param {number} resolution The resolution of the histogram |
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# @param {number} max_possible The maximum value for the histogram |
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def initialize(resolution, max_possible) |
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@lock = Mutex.new |
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@resolution=resolution |
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@max_possible=max_possible |
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@sum=0 |
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@sum_of_squares=0 |
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@multiplier=1+resolution |
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@count=0 |
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@min_seen=max_possible |
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@max_seen=0 |
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@buckets=Array.new(bucket_for(max_possible)+1, 0) |
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end |
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# Add a value to the histogram. This updates all statistics with the new |
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# value. Those statistics should not be modified except with this function |
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# @param {number} value The value to add |
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def add(value) |
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@sum += value |
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@sum_of_squares += value * value |
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@count += 1 |
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if value < @min_seen |
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@min_seen = value |
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end |
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if value > @max_seen |
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@max_seen = value |
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end |
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@buckets[bucket_for(value)] += 1 |
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end |
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def minimum |
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@min_seen |
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end |
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def maximum |
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@max_seen |
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end |
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def sum |
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@sum |
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end |
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def sum_of_squares |
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@sum_of_squares |
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end |
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def count |
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@count |
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end |
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def contents |
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@buckets |
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end |
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def merge(hist) |
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@lock.synchronize do |
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@min_seen = hist.min_seen |
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@max_seen = hist.max_seen |
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@sum += hist.sum |
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@sum_of_squares += hist.sum_of_squares |
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@count += hist.count |
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received_bucket = hist.bucket.to_a |
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@buckets = @buckets.map.with_index{ |m,i| m + received_bucket[i].to_i } |
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end |
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end |
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end
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