procsys 0.7.0

Rust library to retrieve system, kernel, and process metrics from the pseudo-filesystems /proc and /sys
Documentation 
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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137

use serde::Serialize;

use crate::{error::CollectResult, utils};

/// Softirqs represents the softirq statistics
#[derive(Debug, Serialize, Clone, Default)]
pub struct Softirqs {
    pub hi: Vec<u64>,
    pub timer: Vec<u64>,
    pub net_tx: Vec<u64>,
    pub net_rx: Vec<u64>,
    pub block: Vec<u64>,
    pub irq_poll: Vec<u64>,
    pub tasklet: Vec<u64>,
    pub sched: Vec<u64>,
    pub hr_timer: Vec<u64>,
    pub rcu: Vec<u64>,
}

impl Softirqs {
    fn new() -> Self {
        Default::default()
    }
}

/// collects the the softirq statistics
/// # Example
/// ```
/// use procsys::softirqs;
///
/// let sys_softirqs = softirqs::collect().expect("softirqs information");
/// let json_output = serde_json::to_string_pretty(&sys_softirqs).unwrap();
/// println!("{}", json_output);
///
/// ```
pub fn collect() -> CollectResult<Softirqs> {
    collect_from("/proc/softirqs")
}

fn collect_from(filename: &str) -> CollectResult<Softirqs> {
    let mut proc_softirqs = Softirqs::new();

    let irqsdata = utils::read_file_lines(filename)?;

    for line in &irqsdata[1..] {
        let irqdata = line.to_owned();
        let irq_info: Vec<&str> = irqdata
            .trim()
            .split(' ')
            .filter(|s| !s.is_empty())
            .collect();

        match irq_info[0] {
            "HI:" => {
                for value in &irq_info[1..] {
                    proc_softirqs.hi.push(utils::convert_str_to_u64(value)?);
                }
            }
            "TIMER:" => {
                for value in &irq_info[1..] {
                    proc_softirqs.timer.push(utils::convert_str_to_u64(value)?);
                }
            }
            "NET_TX:" => {
                for value in &irq_info[1..] {
                    proc_softirqs.net_tx.push(utils::convert_str_to_u64(value)?);
                }
            }
            "NET_RX:" => {
                for value in &irq_info[1..] {
                    proc_softirqs.net_rx.push(utils::convert_str_to_u64(value)?);
                }
            }
            "BLOCK:" => {
                for value in &irq_info[1..] {
                    proc_softirqs.block.push(utils::convert_str_to_u64(value)?);
                }
            }
            "IRQ_POLL:" => {
                for value in &irq_info[1..] {
                    proc_softirqs
                        .irq_poll
                        .push(utils::convert_str_to_u64(value)?);
                }
            }
            "TASKLET:" => {
                for value in &irq_info[1..] {
                    proc_softirqs
                        .tasklet
                        .push(utils::convert_str_to_u64(value)?);
                }
            }
            "SCHED:" => {
                for value in &irq_info[1..] {
                    proc_softirqs.sched.push(utils::convert_str_to_u64(value)?);
                }
            }
            "HRTIMER:" => {
                for value in &irq_info[1..] {
                    proc_softirqs
                        .hr_timer
                        .push(utils::convert_str_to_u64(value)?);
                }
            }
            "RCU:" => {
                for value in &irq_info[1..] {
                    proc_softirqs.rcu.push(utils::convert_str_to_u64(value)?);
                }
            }
            _ => {}
        }
    }

    Ok(proc_softirqs)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn softirqs_stats() {
        let sys_softirqs = collect_from("test_data/fixtures/proc/softirqs")
            .expect("collecting softirqs information");

        assert_eq!(sys_softirqs.hi, [3, 0]);
        assert_eq!(sys_softirqs.timer, [2776180, 247490]);
        assert_eq!(sys_softirqs.net_tx, [2419, 772]);
        assert_eq!(sys_softirqs.net_rx, [55919, 28694]);
        assert_eq!(sys_softirqs.block, [174915, 262755]);
        assert_eq!(sys_softirqs.irq_poll, [0, 0]);
        assert_eq!(sys_softirqs.tasklet, [209, 75]);
        assert_eq!(sys_softirqs.sched, [2278692, 815209]);
        assert_eq!(sys_softirqs.hr_timer, [1281, 220]);
        assert_eq!(sys_softirqs.rcu, [605871, 532783]);
    }
}