apollo::resource_statistic::MemoryResourceStatistic类 参考

#include <memory_resource_statistic.h>

apollo::resource_statistic::MemoryResourceStatistic 的协作图:

Public 成员函数
bool	GetMemoryMetric (MemoryMetric *mem_metric)
	Get memory metric and write it into mem_metric.

详细描述

在文件 memory_resource_statistic.h 第 32 行定义.

成员函数说明

GetMemoryMetric()

bool apollo::resource_statistic::MemoryResourceStatistic::GetMemoryMetric

(

MemoryMetric *

mem_metric

)

Get memory metric and write it into mem_metric.

参数

mem_metric

Memory metric message

返回

If get metric successfully.

在文件 memory_resource_statistic.cc 第 26 行定义.

                                                                      {
    static const std::string system_mem_stat_file = "/proc/meminfo";
    const int mem_total = 0, available = 2, line_count = 3;
    const auto stat_lines = GetStatsLines(system_mem_stat_file, line_count);
    if (stat_lines.size() < line_count) {
        AERROR << "failed to load contents from " << system_mem_stat_file;
        return false;
    }
    const auto total_memory = GetMemoryValueFromLine(stat_lines[mem_total]);
    const auto available_memory = GetMemoryValueFromLine(stat_lines[available]);
    if (available_memory > total_memory) {
        AERROR << "available memory is larger than total memory";
        return false;
    }
    const auto used_memory = total_memory - available_memory;
    mem_metric->set_total_mb(total_memory >> 10);
    mem_metric->set_used_mb(used_memory >> 10);
    mem_metric->set_available_mb((total_memory - used_memory) >> 10);
    mem_metric->set_usage(100.f * (static_cast<float>(used_memory) / total_memory));
    return true;
}

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该类的文档由以下文件生成:

• modules/statistics/resource/memory_resource_statistic.h
• modules/statistics/resource/memory_resource_statistic.cc