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120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/******************************************************************************
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* $Id: MonitorProcMem.h 2035 2013-01-21 14:12:19Z rdempsey $
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*
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*****************************************************************************/
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/** @file StagedDL datalist used to process data concurrently in stages.
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*
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*/
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#pragma once
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#include <sys/types.h>
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#include <unistd.h>
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#include "cgroupconfigurator.h"
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//#include "pp_logger.h"
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namespace utils
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{
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/** @brief A class to monitor a process's memory usage.
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*
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* This class will monitor and terminate the process if
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* this process exceeds the specified memory limit.
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*/
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class MonitorProcMem
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{
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public:
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/** @brief MonitorProcMem constructor
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*
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* @param maxPct (in) maximum allowable memory usage
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* @param memChk (in) monitor total system physical memory usage
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* @param msgLog (in) message logger to log msg to
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* @param sec (in) number of seconds between memory checks
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*/
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explicit MonitorProcMem(size_t maxPct, size_t memChk, uint32_t subsystemID, unsigned sec = 1)
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: fPid(getpid()), fMaxPct(maxPct), fSleepSec(sec), fSubsystemID(subsystemID), fPageSize(getpagesize())
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{
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fMemPctCheck = memChk;
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fMemTotal = memTotal();
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}
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virtual ~MonitorProcMem(){};
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/** @brief Thread entry point
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*
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* Entry point for this thread that monitors memory usage.
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*/
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virtual void operator()() const;
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/* Accessor to return the free memory
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*
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*/
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size_t getFreeMem() const
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{
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return fMemFree;
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}
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/* return the % of total memory used
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*
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*/
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static unsigned memUsedPct();
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/* return true if memory usage is below configured limit
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*
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*/
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static bool isMemAvailable(size_t memRequest = 0);
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protected:
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// Defaults are okay
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// MonitorProcMem (const MonitorProcMem& rhs);
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// MonitorProcMem& operator=(const MonitorProcMem& rhs);
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/** return the current process RSS size in MB
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*
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*/
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size_t rss() const;
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/* return the system RAM size in MB
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*
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*/
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size_t memTotal() const;
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/* pause for fSleepSec seconds between memory usage checks
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*
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*/
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void pause_() const;
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pid_t fPid; // process pid
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size_t fMaxPct; // max allowable % memory use
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unsigned fSleepSec; // sleep interval in seconds
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uint32_t fSubsystemID; // Subsystem ID for Logger
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int fPageSize; // page size for this host (in bytes)
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// @bug4507, monitor % of total used system memory
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static uint64_t fMemTotal;
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static uint64_t fMemFree;
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static int fMemPctCheck;
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mutable CGroupConfigurator cg;
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};
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} // namespace utils
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