09a263e607
git-subtree-dir: deps/memkind/src git-subtree-split: bb9f19dd1b3ed6cc5e1b35919564ccf6f4b32f69
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/*
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* Copyright (C) 2015 - 2018 Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice(s),
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice(s),
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <assert.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <iostream>
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#include <string>
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#include <sstream>
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class Numastat
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{
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public:
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//Returns numastat memory usage per node.
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static float get_total_memory(unsigned node)
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{
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static pid_t pid = getpid();
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std::stringstream cmd;
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cmd << "numastat " << pid;
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FILE *file;
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char buff[256];
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float result = -1.0;
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if((file = popen(cmd.str().c_str(), "r"))) {
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while(fgets(buff, 256, file));
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pclose(file);
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//We got: "Total 1181.90 2.00 1183.90".
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//2.00 is our memory usage from Node 1.
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std::string last_line(buff);
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size_t dot_pos = 0;
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//Now we search in: " 2.00 1183.90".
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for(unsigned i=0; i<=node; i++) {
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dot_pos = last_line.find(".", dot_pos+1);
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assert(dot_pos != std::string::npos);
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}
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//We are at: " 2.00 1183.90".
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size_t number_begin = last_line.rfind(" ", dot_pos);
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assert(number_begin != std::string::npos);
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number_begin += 1;
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buff[dot_pos+3] = '\0';
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#if __cplusplus > 201100L
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result = strtod(&buff[number_begin], NULL);
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#else
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result = atof(&buff[number_begin]);
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#endif
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}
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assert(result > -0.01);
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return result;
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}
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};
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