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winix/winixd/core/loadavg.h

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3.3 KiB

/*
* This file is a part of Winix
* and is distributed under the 2-Clause BSD licence.
* Author: Tomasz Sowa <t.sowa@ttmath.org>
*/
/*
* Copyright (c) 2008-2018, Tomasz Sowa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef headerfile_winix_core_loadavg
#define headerfile_winix_core_loadavg
#include <ctime>
#include "winixbase.h"
#include "request.h"
namespace Winix
{
// in seconds
#define WINIX_LOADAVG_GRANULARITY1 2
#define WINIX_LOADAVG_GRANULARITY5 15
#define WINIX_LOADAVG_GRANULARITY15 45
class LoadAvg : public WinixBase
{
public:
LoadAvg();
~LoadAvg();
LoadAvg & operator=(const LoadAvg & l);
LoadAvg(const LoadAvg & l);
void StartRequest(Request * req);
void StopRequest(Request * req);
double LoadAvgNow(); // load average withing last WINIX_LOADAVG_GRANULARITY1 seconds
double LoadAvg1();
double LoadAvg5();
double LoadAvg15();
double ReqPerSecNow();
double ReqPerSec1();
double ReqPerSec5();
double ReqPerSec15();
private:
struct Times
{
double dr; // time for the request (in seconds)
double dp; // time for the pause between requestes(in seconds)
long req; // how many requests
void Clear()
{
dr = 0.0;
dp = 0.0;
req = 0;
}
Times & operator=(const Times & t)
{
dr = t.dr;
dp = t.dp;
req = t.req;
return *this;
}
};
timespec timespec_old_req_stop;
void CheckTimers();
void UpdateTimer1();
void UpdateTimer5();
void UpdateTimer15();
Times current1;
Times current5;
Times current15;
void CreateTable(size_t seconds, size_t granulatiry, Times* & tab, size_t & len);
void CreateTable();
void MoveTab(Times * tab, size_t len);
void SumTab(Times * tab, size_t len, double expected, Times & t);
void Calculate1();
void Calculate5();
void Calculate15();
Times * tab1;
size_t len1;
Times * tab5;
size_t len5;
Times * tab15;
size_t len15;
double cache_load1;
double cache_load5;
double cache_load15;
double cache_req_per_sec1;
double cache_req_per_sec5;
double cache_req_per_sec15;
};
} // namespace Winix
#endif