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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Memory profiling functions.
use libc::{c_char,c_int,c_void,size_t};
use std::io::timer::sleep;
#[cfg(target_os="linux")]
use std::io::File;
use std::mem::size_of;
#[cfg(target_os="linux")]
use std::os::page_size;
use std::ptr::mut_null;
use task::spawn_named;
#[cfg(target_os="macos")]
use task_info::task_basic_info::{virtual_size,resident_size};
pub struct MemoryProfilerChan(pub Sender<MemoryProfilerMsg>);
impl MemoryProfilerChan {
pub fn send(&self, msg: MemoryProfilerMsg) {
let MemoryProfilerChan(ref c) = *self;
c.send(msg);
}
}
pub enum MemoryProfilerMsg {
/// Message used to force print the memory profiling metrics.
PrintMsg,
/// Tells the memory profiler to shut down.
ExitMsg,
}
pub struct MemoryProfiler {
pub port: Receiver<MemoryProfilerMsg>,
}
impl MemoryProfiler {
pub fn create(period: Option<f64>) -> MemoryProfilerChan {
let (chan, port) = channel();
match period {
Some(period) => {
let period = (period * 1000f64) as u64;
let chan = chan.clone();
spawn_named("Memory profiler timer", proc() {
loop {
sleep(period);
if chan.send_opt(PrintMsg).is_err() {
break;
}
}
});
// Spawn the memory profiler.
spawn_named("Memory profiler", proc() {
let memory_profiler = MemoryProfiler::new(port);
memory_profiler.start();
});
}
None => {
// No-op to handle messages when the memory profiler is
// inactive.
spawn_named("Memory profiler", proc() {
loop {
match port.recv_opt() {
Err(_) | Ok(ExitMsg) => break,
_ => {}
}
}
});
}
}
MemoryProfilerChan(chan)
}
pub fn new(port: Receiver<MemoryProfilerMsg>) -> MemoryProfiler {
MemoryProfiler {
port: port
}
}
pub fn start(&self) {
loop {
match self.port.recv_opt() {
Ok(msg) => {
if !self.handle_msg(msg) {
break
}
}
_ => break
}
}
}
fn handle_msg(&self, msg: MemoryProfilerMsg) -> bool {
match msg {
PrintMsg => {
self.handle_print_msg();
true
},
ExitMsg => false
}
}
fn print_measurement(path: &str, nbytes: Option<u64>) {
match nbytes {
Some(nbytes) => {
let mebi = 1024f64 * 1024f64;
println!("{:16s}: {:12.2f}", path, (nbytes as f64) / mebi);
}
None => {
println!("{:16s}: {:>12s}", path, "???");
}
}
}
fn handle_print_msg(&self) {
println!("{:16s}: {:12s}", "_category_", "_size (MiB)_");
// Virtual and physical memory usage, as reported by the OS.
MemoryProfiler::print_measurement("vsize", get_vsize());
MemoryProfiler::print_measurement("resident", get_resident());
// The descriptions of the jemalloc measurements are taken directly
// from the jemalloc documentation.
// Total number of bytes allocated by the application.
MemoryProfiler::print_measurement("heap-allocated", get_jemalloc_stat("stats.allocated"));
// Total number of bytes in active pages allocated by the application.
// This is a multiple of the page size, and greater than or equal to
// |stats.allocated|.
MemoryProfiler::print_measurement("heap-active", get_jemalloc_stat("stats.active"));
// Total number of bytes in chunks mapped on behalf of the application.
// This is a multiple of the chunk size, and is at least as large as
// |stats.active|. This does not include inactive chunks.
MemoryProfiler::print_measurement("heap-mapped", get_jemalloc_stat("stats.mapped"));
println!("");
}
}
extern {
fn je_mallctl(name: *const c_char, oldp: *mut c_void, oldlenp: *mut size_t,
newp: *mut c_void, newlen: size_t) -> c_int;
}
fn get_jemalloc_stat(name: &'static str) -> Option<u64> {
let mut old: size_t = 0;
let c_name = name.to_c_str();
let oldp = &mut old as *mut _ as *mut c_void;
let mut oldlen = size_of::<size_t>() as size_t;
let rv: c_int;
unsafe {
rv = je_mallctl(c_name.unwrap(), oldp, &mut oldlen, mut_null(), 0);
}
if rv == 0 { Some(old as u64) } else { None }
}
// Like std::macros::try!, but for Option<>.
macro_rules! option_try(
($e:expr) => (match $e { Some(e) => e, None => return None })
)
#[cfg(target_os="linux")]
fn get_proc_self_statm_field(field: uint) -> Option<u64> {
let mut f = File::open(&Path::new("/proc/self/statm"));
match f.read_to_string() {
Ok(contents) => {
let s = option_try!(contents.as_slice().words().nth(field));
let npages: u64 = option_try!(from_str(s));
Some(npages * (page_size() as u64))
}
Err(_) => None
}
}
#[cfg(target_os="linux")]
fn get_vsize() -> Option<u64> {
get_proc_self_statm_field(0)
}
#[cfg(target_os="linux")]
fn get_resident() -> Option<u64> {
get_proc_self_statm_field(1)
}
#[cfg(target_os="macos")]
fn get_vsize() -> Option<u64> {
virtual_size()
}
#[cfg(target_os="macos")]
fn get_resident() -> Option<u64> {
resident_size()
}
#[cfg(not(target_os="linux"), not(target_os = "macos"))]
fn get_vsize() -> Option<u64> {
None
}
#[cfg(not(target_os="linux"), not(target_os = "macos"))]
fn get_resident() -> Option<u64> {
None
}
|
