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73 lines
1.9 KiB
C++
73 lines
1.9 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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#pragma once
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#include <stdlib.h>
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#include <inttypes.h>
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#include <string>
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#include "configcpp.h"
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namespace utils
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{
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/* This class wraps a few methods for getting configuration variables that potentially
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come from a cgroup. Might move it to utils/configcpp, and/or change the name. */
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class CGroupConfigurator
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{
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public:
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enum CGroupVersions
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{
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v1,
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v2,
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};
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CGroupConfigurator();
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virtual ~CGroupConfigurator();
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uint32_t getNumCores();
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uint64_t getTotalMemory();
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uint64_t getFreeMemory();
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bool usingCGroup()
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{
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return cGroupDefined;
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}
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private:
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uint32_t getNumCoresFromProc();
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uint32_t getNumCoresFromCGroup();
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uint64_t getTotalMemoryFromProc();
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uint64_t getTotalMemoryFromCGroup();
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uint64_t getFreeMemoryFromProc();
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uint64_t getMemUsageFromCGroup();
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std::string cGroupName;
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std::string memUsageFilename;
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std::string memStatePrefix;
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bool cGroupDefined;
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config::Config* config;
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uint64_t totalMemory = 0;
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const uint64_t GIB = 1024ULL * 1024ULL * 1024ULL;
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bool printedWarning = false;
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enum CGroupVersions cGroupVersion_;
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unsigned int logCounter = 0;
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static constexpr unsigned int logMemoryPeriod = 5000;
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};
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} // namespace utils
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