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* UptimeClock is a chrono-compatible seconds-precision clock. * Like UptimeTimer, its purpose is to make it possible for clients to query the uptime thousands of times per second without a significant performance hit. * UptimeClock decouples itself from LoadManager by managing its own once-per-second update loop. * Clients now traffic in chrono time_points and durations instead of int.
84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef RIPPLE_CORE_LOADMONITOR_H_INCLUDED
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#define RIPPLE_CORE_LOADMONITOR_H_INCLUDED
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#include <ripple/basics/UptimeClock.h>
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#include <ripple/core/LoadEvent.h>
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#include <ripple/beast/utility/Journal.h>
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#include <chrono>
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#include <mutex>
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namespace ripple {
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// Monitors load levels and response times
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// VFALCO TODO Rename this. Having both LoadManager and LoadMonitor is confusing.
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//
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class LoadMonitor
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{
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public:
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explicit
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LoadMonitor (beast::Journal j);
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void addLoadSample (LoadEvent const& sample);
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void addSamples (int count, std::chrono::milliseconds latency);
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void setTargetLatency (std::chrono::milliseconds avg,
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std::chrono::milliseconds pk);
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bool isOverTarget (std::chrono::milliseconds avg,
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std::chrono::milliseconds peak);
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// VFALCO TODO make this return the values in a struct.
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struct Stats
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{
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Stats();
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std::uint64_t count;
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std::chrono::milliseconds latencyAvg;
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std::chrono::milliseconds latencyPeak;
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bool isOverloaded;
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};
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Stats getStats ();
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bool isOver ();
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private:
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void update ();
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std::mutex mutex_;
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std::uint64_t mCounts;
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int mLatencyEvents;
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std::chrono::milliseconds mLatencyMSAvg;
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std::chrono::milliseconds mLatencyMSPeak;
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std::chrono::milliseconds mTargetLatencyAvg;
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std::chrono::milliseconds mTargetLatencyPk;
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UptimeClock::time_point mLastUpdate;
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beast::Journal j_;
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};
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} // ripple
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#endif
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