This repository has been archived by the owner on Jun 10, 2021. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 8
/
linux_process_memory_measurement_node.hpp
87 lines (74 loc) · 2.8 KB
/
linux_process_memory_measurement_node.hpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Licensed 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.
#ifndef SYSTEM_METRICS_COLLECTOR__LINUX_PROCESS_MEMORY_MEASUREMENT_NODE_HPP_
#define SYSTEM_METRICS_COLLECTOR__LINUX_PROCESS_MEMORY_MEASUREMENT_NODE_HPP_
#include <chrono>
#include <cmath>
#include <string>
#include "../../src/system_metrics_collector/periodic_measurement_node.hpp"
#include "../../src/system_metrics_collector/utilities.hpp"
#include "rclcpp/rclcpp.hpp"
#include "rcutils/logging_macros.h"
namespace system_metrics_collector
{
/**
* Return the number of bytes used after parsing a process's statm file.
*
* @param statm_process_file the statm file to parse
* @return the number of bytes used for the statm file's process
*@throws std::ifstream::failure for std::ios::failbit | std::ios::badbit
*/
uint64_t GetProcessUsedMemory(const std::string & statm_process_file_contents);
/**
* Class used to measure the memory percentage used as a process.
*/
class LinuxProcessMemoryMeasurementNode : public PeriodicMeasurementNode
{
public:
/**
* Construct a LinuxProcessMemoryMeasurementNode
*
* @param name the name of this node
* @param measurement_period the period of this node, used to read measurements
* @param topic the topic name used for publishing
* @param publish_period the period at which metrics are published.
*/
LinuxProcessMemoryMeasurementNode(const std::string & name, const rclcpp::NodeOptions & options);
protected:
/**
* Return the name to use for this metric
* @return a string of the name for this measured metric
*/
std::string GetMetricName() const override;
private:
/**
* Perform a periodic measurement calculating the percentage of
* memory this process used. This reads and parses the /proc/<pid>/statm file
* to obtain the process memory used and divides that by the total system
* memory, which is obtained through sys/sysinfo.h.
*
* @return percentage of memory this process used
*/
double PeriodicMeasurement() override;
/**
* The pid of this process/
*/
const std::string pid_;
/**
* The statm file to read for this process.
*/
const std::string file_to_read_;
};
} // namespace system_metrics_collector
#endif // SYSTEM_METRICS_COLLECTOR__LINUX_PROCESS_MEMORY_MEASUREMENT_NODE_HPP_