prometheus 0.14.0

Prometheus instrumentation library for Rust applications.
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
138
139
140
141
142
143
144
145
146
147

// Copyright 2016 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.

use criterion::{criterion_group, criterion_main, Criterion};
use prometheus::{core::Collector, Histogram, HistogramOpts, HistogramVec};
use std::sync::{atomic, Arc};
use std::thread;

fn bench_histogram_with_label_values(c: &mut Criterion) {
    let histogram = HistogramVec::new(
        HistogramOpts::new("benchmark_histogram", "A histogram to benchmark it."),
        &["one", "two", "three"],
    )
    .unwrap();
    c.bench_function("bench_histogram_with_label_values", |b| {
        b.iter(|| {
            histogram
                .with_label_values(&["eins", "zwei", "drei"])
                .observe(3.1415)
        })
    });
}

fn bench_histogram_no_labels(c: &mut Criterion) {
    let histogram = Histogram::with_opts(HistogramOpts::new(
        "benchmark_histogram",
        "A histogram to benchmark it.",
    ))
    .unwrap();
    c.bench_function("bench_histogram_no_labels", |b| {
        b.iter(|| histogram.observe(3.1415))
    });
}

fn bench_histogram_timer(c: &mut Criterion) {
    let histogram = Histogram::with_opts(HistogramOpts::new(
        "benchmark_histogram_timer",
        "A histogram to benchmark it.",
    ))
    .unwrap();
    c.bench_function("bench_histogram_timer", |b| {
        b.iter(|| histogram.start_timer())
    });
}
fn bench_histogram_local(c: &mut Criterion) {
    let histogram = Histogram::with_opts(HistogramOpts::new(
        "benchmark_histogram_local",
        "A histogram to benchmark it.",
    ))
    .unwrap();
    let local = histogram.local();
    c.bench_function("bench_histogram_local", |b| {
        b.iter(|| local.observe(3.1415));
    });
    local.flush();
}

fn bench_local_histogram_timer(c: &mut Criterion) {
    let histogram = Histogram::with_opts(HistogramOpts::new(
        "benchmark_histogram_local_timer",
        "A histogram to benchmark it.",
    ))
    .unwrap();
    let local = histogram.local();
    c.bench_function("bench_local_histogram_timer", |b| {
        b.iter(|| local.start_timer());
    });
    local.flush();
}

fn concurrent_observe_and_collect(c: &mut Criterion) {
    let signal_exit = Arc::new(atomic::AtomicBool::new(false));
    let opts = HistogramOpts::new("test_name", "test help").buckets(vec![1.0]);
    let histogram = Histogram::with_opts(opts).unwrap();

    let mut handlers = vec![];

    for _ in 0..4 {
        let histogram = histogram.clone();
        let signal_exit = signal_exit.clone();
        handlers.push(thread::spawn(move || {
            while !signal_exit.load(atomic::Ordering::Relaxed) {
                for _ in 0..1_000 {
                    histogram.observe(1.0);
                }

                histogram.collect();
            }
        }));
    }

    c.bench_function("concurrent_observe_and_collect", |b| {
        b.iter(|| histogram.observe(1.0));
    });

    signal_exit.store(true, atomic::Ordering::Relaxed);
    for handler in handlers {
        handler.join().unwrap();
    }
}

criterion_group!(
    benches,
    bench_histogram_with_label_values,
    bench_histogram_no_labels,
    bench_histogram_timer,
    bench_histogram_local,
    bench_local_histogram_timer,
    concurrent_observe_and_collect,
);
criterion_main!(benches);

/*
#[bench]
#[cfg(feature = "nightly")]
fn bench_histogram_coarse_timer(c: &mut Criterion) {
    let histogram = Histogram::with_opts(HistogramOpts::new(
        "benchmark_histogram_timer",
        "A histogram to benchmark it.",
    ))
    .unwrap();
    b.iter(|| histogram.start_coarse_timer())
}

#[bench]
#[cfg(feature = "nightly")]
fn bench_local_histogram_coarse_timer(c: &mut Criterion) {
    let histogram = Histogram::with_opts(HistogramOpts::new(
        "benchmark_histogram_timer",
        "A histogram to benchmark it.",
    ))
    .unwrap();
    let local = histogram.local();
    b.iter(|| local.start_coarse_timer());
    local.flush();
}
*/