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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
use std::{fs::File, io::Read};
use crate::error::Error;
/// 进程性能查询工具
pub struct PPerfTool {
pid: u32,
last_time: u64,
}
impl PPerfTool {
/// 创建进程性能查询工具实例
///
/// 该实例目前仅支持linux系统
#[cfg(target_os = "linux")]
pub fn new() -> Result<PPerfTool, Error> {
Ok(PPerfTool {
pid: std::process::id(),
last_time: 0,
})
}
#[cfg(not(target_os = "linux"))]
pub fn new() -> Result<PPerfTool, Error> {
Err(Error::OSNotSupportError)
}
/// 获取cpu时间（单位jiffies，即1/Hz）
///
/// ```rust
/// use crate::pperf::tool;
/// let t = tool::PPerfTool::new().unwrap();
/// let cputime = t.get_process_cpu_time();
/// println!("get_process_cpu_time: {:?}", cputime)
/// ```
pub fn get_process_cpu_time(&self) -> Result<u64, Error> {
let mut raw_stat = String::new();
let path = format!("/proc/{}/stat", self.pid);
let mut f = File::open(path)?;
f.read_to_string(&mut raw_stat)?;
let fields = raw_stat.split(" ");
let utime = fields
.clone()
.nth(13)
.ok_or(Error::GetFieldError)?
.trim()
.parse::<u64>()?;
let stime = fields
.clone()
.nth(14)
.ok_or(Error::GetFieldError)?
.trim()
.parse::<u64>()?;
let cutime = fields
.clone()
.nth(15)
.ok_or(Error::GetFieldError)?
.trim()
.parse::<u64>()?;
let cstime = fields
.clone()
.nth(16)
.ok_or(Error::GetFieldError)?
.trim()
.parse::<u64>()?;
return Ok(utime + stime + cutime + cstime);
}
/// 获取cpu增量时间（单位jiffies，即1/Hz，与上次获取cpu时间的增量）
///
/// ```rust
/// use crate::pperf::tool;
/// let mut t = tool::PPerfTool::new().unwrap();
/// let incr_cputime = t.get_process_cpu_incr_time();
/// println!("get_process_cpu_incr_time: {:?}", incr_cputime)
/// ```
pub fn get_process_cpu_incr_time(&mut self) -> Result<u64, Error> {
let cpu_time = self.get_process_cpu_time()?;
let incr_time = cpu_time - self.last_time;
self.last_time = cpu_time;
Ok(incr_time)
}
/// 获取进程rss内存
///
/// ```rust
/// use crate::pperf::tool;
/// let mut t = tool::PPerfTool::new().unwrap();
/// let rss = t.get_process_mem_rss();
/// println!("get_process_mem_rss: {:?}", rss)
/// ```
pub fn get_process_mem_rss(&self) -> Result<u64, Error> {
let mut raw_stat = String::new();
let path = format!("/proc/{}/stat", self.pid);
let mut f = File::open(path)?;
f.read_to_string(&mut raw_stat)?;
let fields = raw_stat.split(" ");
Ok(fields
.clone()
.nth(23)
.ok_or(Error::GetFieldError)?
.trim()
.parse::<u64>()?)
}
/// 获取进程vsize内存
///
/// ```rust
/// use crate::pperf::tool;
/// let mut t = tool::PPerfTool::new().unwrap();
/// let vsize = t.get_process_mem_vsize();
/// println!("get_process_mem_vsize: {:?}", vsize)
/// ```
pub fn get_process_mem_vsize(&self) -> Result<u64, Error> {
let mut raw_stat = String::new();
let path = format!("/proc/{}/stat", self.pid);
let mut f = File::open(path)?;
f.read_to_string(&mut raw_stat)?;
let fields = raw_stat.split(" ");
Ok(fields
.clone()
.nth(22)
.ok_or(Error::GetFieldError)?
.trim()
.parse::<u64>()?)
}
/// 获取进程uss内存
///
/// ```rust
/// use crate::pperf::tool;
/// let mut t = tool::PPerfTool::new().unwrap();
/// let uss = t.get_process_mem_uss();
/// println!("get_process_mem_uss: {:?}", uss)
/// ```
pub fn get_process_mem_uss(&self) -> Result<u64, Error> {
let mut uss = 0u64;
let mut raw_smaps = String::new();
let path = format!("/proc/{}/smaps", self.pid);
let mut f = File::open(path)?;
f.read_to_string(&mut raw_smaps)?;
let lines = raw_smaps.split("\n");
for line in lines {
if line.starts_with("Private_Clean:") {
let val = line
.strip_prefix("Private_Clean:")
.ok_or(Error::ParseError)?
.strip_suffix("kB")
.ok_or(Error::ParseError)?
.trim()
.parse::<u64>()?;
uss = uss + val;
}
if line.starts_with("Private_Dirty:") {
let val = line
.strip_prefix("Private_Dirty:")
.ok_or(Error::ParseError)?
.strip_suffix("kB")
.ok_or(Error::ParseError)?
.trim()
.parse::<u64>()?;
uss = uss + val;
}
}
Ok(uss)
}
}
#[test]
fn test_get_process_cpu_time() {
let tool = PPerfTool::new();
println!(
"get_process_cpu_incr_time: {:?}",
tool.unwrap().get_process_cpu_incr_time().unwrap()
)
}