97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you under the Apache License, Version 2.0 (the
|
|
// "License"); you may not use this file except in compliance
|
|
// with the License. You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing,
|
|
// software distributed under the License is distributed on an
|
|
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
// KIND, either express or implied. See the License for the
|
|
// specific language governing permissions and limitations
|
|
// under the License.
|
|
|
|
#include "util/mem_info.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <fstream>
|
|
#include <iostream>
|
|
#include <sstream>
|
|
|
|
#include "gutil/strings/split.h"
|
|
#include "util/cgroup_util.h"
|
|
#include "util/pretty_printer.h"
|
|
#include "util/string_parser.hpp"
|
|
|
|
namespace doris {
|
|
|
|
bool MemInfo::_s_initialized = false;
|
|
int64_t MemInfo::_s_physical_mem = -1;
|
|
|
|
void MemInfo::init() {
|
|
// Read from /proc/meminfo
|
|
std::ifstream meminfo("/proc/meminfo", std::ios::in);
|
|
std::string line;
|
|
|
|
while (meminfo.good() && !meminfo.eof()) {
|
|
getline(meminfo, line);
|
|
std::vector<std::string> fields = strings::Split(line, " ", strings::SkipWhitespace());
|
|
|
|
// We expect lines such as, e.g., 'MemTotal: 16129508 kB'
|
|
if (fields.size() < 3) {
|
|
continue;
|
|
}
|
|
|
|
if (fields[0].compare("MemTotal:") != 0) {
|
|
continue;
|
|
}
|
|
|
|
StringParser::ParseResult result;
|
|
int64_t mem_total_kb =
|
|
StringParser::string_to_int<int64_t>(fields[1].data(), fields[1].size(), &result);
|
|
|
|
if (result == StringParser::PARSE_SUCCESS) {
|
|
// Entries in /proc/meminfo are in KB.
|
|
_s_physical_mem = mem_total_kb * 1024L;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
int64_t cgroup_mem_limit = 0;
|
|
Status status = CGroupUtil::find_cgroup_mem_limit(&cgroup_mem_limit);
|
|
if (status.ok() && cgroup_mem_limit > 0) {
|
|
_s_physical_mem = std::min(_s_physical_mem, cgroup_mem_limit);
|
|
}
|
|
|
|
if (meminfo.is_open()) {
|
|
meminfo.close();
|
|
}
|
|
|
|
if (_s_physical_mem == -1) {
|
|
LOG(WARNING) << "Could not determine amount of physical memory on this machine.";
|
|
}
|
|
|
|
LOG(INFO) << "Physical Memory: " << PrettyPrinter::print(_s_physical_mem, TUnit::BYTES);
|
|
|
|
_s_initialized = true;
|
|
}
|
|
|
|
std::string MemInfo::debug_string() {
|
|
DCHECK(_s_initialized);
|
|
CGroupUtil util;
|
|
std::stringstream stream;
|
|
stream << "Mem Info: " << PrettyPrinter::print(_s_physical_mem, TUnit::BYTES) << std::endl;
|
|
stream << "CGroup Info: " << util.debug_string() << std::endl;
|
|
return stream.str();
|
|
}
|
|
|
|
} // namespace doris
|