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dbe9baff1f
There are several missing includes for cmath in the code, I added those. Next, Coro returns a reference to a stack variable and this causes a warning. As this is probably ok for Coro, I disabled the warning in that file for GCC. I want to have this warning in the build system as it is generally a very useful warning to have. Another change is that major and minor are deprecated for a while now. I replaced those with gnu_dev_major and gnu_dev_minor. ErrorOr currently implements operators ==, !=, and <. These do not compile because Error does not implement ==. This compiles on older versions of gcc and clang because ErrorOr<T>::operator== is not used anywhere. It is still wrong though and newer gcc versions complain. I simply removed these methods. The most interesting fix is that TraceEvent::~TraceEvent is currently throwing exceptions. This is illegal behavior in C++11 and a idea in older versions of C++. For now I simply removed the throw, but this might need some more thought.
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
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* Smoother.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project 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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*/
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#ifndef FLOW_SMOOTHER_H
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#define FLOW_SMOOTHER_H
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#pragma once
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#include "flow/flow.h"
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#include <cmath>
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struct Smoother {
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// Times (t) are expected to be nondecreasing
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explicit Smoother( double eFoldingTime ) : eFoldingTime(eFoldingTime) { reset(0); }
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void reset(double value) { time = 0; total = value; estimate = value; }
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void setTotal( double total, double t = now() ) { addDelta( total - this->total, t); }
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void addDelta( double delta, double t = now() ) {
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update(t);
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total += delta;
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}
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// smoothTotal() is a continuous (under)estimate of the sum of all addDeltas()
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double smoothTotal( double t = now() ) {
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update(t);
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return estimate;
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}
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// smoothRate() is d/dt[smoothTotal], and is NOT continuous
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double smoothRate( double t = now() ) {
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update(t);
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return (total-estimate) / eFoldingTime;
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}
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void update(double t) {
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double elapsed = t - time;
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if(elapsed) {
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time = t;
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estimate += (total-estimate) * (1-exp( -elapsed/eFoldingTime ));
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}
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}
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double eFoldingTime;
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double time, total, estimate;
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};
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struct TimerSmoother {
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// Times (t) are expected to be nondecreasing
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explicit TimerSmoother( double eFoldingTime ) : eFoldingTime(eFoldingTime) { reset(0); }
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void reset(double value) { time = 0; total = value; estimate = value; }
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void setTotal( double total, double t = timer() ) { addDelta( total - this->total, t); }
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void addDelta( double delta, double t = timer() ) {
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update(t);
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total += delta;
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}
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// smoothTotal() is a continuous (under)estimate of the sum of all addDeltas()
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double smoothTotal( double t = timer() ) {
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update(t);
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return estimate;
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}
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// smoothRate() is d/dt[smoothTotal], and is NOT continuous
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double smoothRate( double t = timer() ) {
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update(t);
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return (total-estimate) / eFoldingTime;
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}
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void update(double t) {
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double elapsed = t - time;
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time = t;
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estimate += (total-estimate) * (1-exp( -elapsed/eFoldingTime ));
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}
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double eFoldingTime;
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double time, total, estimate;
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};
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#endif
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