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Integrate High Dynamic Range Histogram #120

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88 changes: 88 additions & 0 deletions Cargo.lock

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1 change: 1 addition & 0 deletions Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ futures = "0.3.5"
lazy_static = "1.4.0"
num_cpus = "1.13.0"
rand = "0.7.3"
hdrhistogram = "7.4.0"

# Add openssl-sys as a direct dependency so it can be cross compiled to
# x86_64-unknown-linux-musl using the "vendored" feature below
Expand Down
62 changes: 34 additions & 28 deletions src/main.rs
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ use crate::actions::Report;
use clap::crate_version;
use clap::{App, Arg};
use colored::*;
use hdrhistogram::Histogram;
use linked_hash_map::LinkedHashMap;
use std::collections::HashMap;
use std::process;
Expand Down Expand Up @@ -63,34 +64,35 @@ struct DrillStats {
total_requests: usize,
successful_requests: usize,
failed_requests: usize,
mean_duration: f64,
median_duration: f64,
stdev_duration: f64,
hist: Histogram<u64>,
}

impl DrillStats {
fn mean_duration(&self) -> f64 {
self.hist.mean() / 1_000.0
}
fn median_duration(&self) -> f64 {
self.hist.value_at_quantile(0.5) as f64 / 1_000.0
}
fn stdev_duration(&self) -> f64 {
self.hist.stdev() / 1_000.0
}
fn value_at_quantile(&self, quantile: f64) -> f64 {
self.hist.value_at_quantile(quantile) as f64 / 1_000.0
}
}

fn compute_stats(sub_reports: &[Report]) -> DrillStats {
let mut hist = Histogram::<u64>::new_with_bounds(1, 60 * 60 * 1000, 2).unwrap();
let mut group_by_status = HashMap::new();

for req in sub_reports {
group_by_status.entry(req.status / 100).or_insert_with(Vec::new).push(req);
}

let mut durations = sub_reports.iter().map(|r| r.duration).collect::<Vec<f64>>();
let mean_duration = durations.iter().fold(0f64, |a, &b| a + b) / durations.len() as f64;
let deviations = durations.iter().map(|a| (mean_duration - a).powf(2.0)).collect::<Vec<f64>>();
let stdev_duration = (deviations.iter().fold(0f64, |a, &b| a + b) / durations.len() as f64).sqrt();

durations.sort_by(|a, b| a.partial_cmp(b).unwrap());
let durlen = durations.len();
let median_duration = if durlen == 0 {
f64::NAN
} else if durlen % 2 == 0 {
durations[durlen / 2]
} else if durlen > 1 {
(durations[durlen / 2] + durations[durlen / 2 + 1]) / 2f64
} else {
durations[0]
};
for r in sub_reports.iter() {
hist += (r.duration * 1_000.0) as u64;
}

let total_requests = sub_reports.len();
let successful_requests = group_by_status.entry(2).or_insert_with(Vec::new).len();
Expand All @@ -100,9 +102,7 @@ fn compute_stats(sub_reports: &[Report]) -> DrillStats {
total_requests,
successful_requests,
failed_requests,
mean_duration,
median_duration,
stdev_duration,
hist,
}
}

Expand Down Expand Up @@ -132,9 +132,12 @@ fn show_stats(list_reports: &[Vec<Report>], stats_option: bool, nanosec: bool, d
println!("{:width$} {:width2$} {}", name.green(), "Total requests".yellow(), substats.total_requests.to_string().purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Successful requests".yellow(), substats.successful_requests.to_string().purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Failed requests".yellow(), substats.failed_requests.to_string().purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Median time per request".yellow(), format_time(substats.median_duration, nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Average time per request".yellow(), format_time(substats.mean_duration, nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Sample standard deviation".yellow(), format_time(substats.stdev_duration, nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Median time per request".yellow(), format_time(substats.median_duration(), nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Average time per request".yellow(), format_time(substats.mean_duration(), nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "Sample standard deviation".yellow(), format_time(substats.stdev_duration(), nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "99.0'th percentile".yellow(), format_time(substats.value_at_quantile(0.99), nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "99.5'th percentile".yellow(), format_time(substats.value_at_quantile(0.995), nanosec).purple(), width = 25, width2 = 25);
println!("{:width$} {:width2$} {}", name.green(), "99.9'th percentile".yellow(), format_time(substats.value_at_quantile(0.999), nanosec).purple(), width = 25, width2 = 25);
}

// compute global stats
Expand All @@ -148,9 +151,12 @@ fn show_stats(list_reports: &[Vec<Report>], stats_option: bool, nanosec: bool, d
println!("{:width2$} {}", "Successful requests".yellow(), global_stats.successful_requests.to_string().purple(), width2 = 25);
println!("{:width2$} {}", "Failed requests".yellow(), global_stats.failed_requests.to_string().purple(), width2 = 25);
println!("{:width2$} {} {}", "Requests per second".yellow(), format!("{:.2}", requests_per_second).purple(), "[#/sec]".purple(), width2 = 25);
println!("{:width2$} {}", "Median time per request".yellow(), format_time(global_stats.median_duration, nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "Average time per request".yellow(), format_time(global_stats.mean_duration, nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "Sample standard deviation".yellow(), format_time(global_stats.stdev_duration, nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "Median time per request".yellow(), format_time(global_stats.median_duration(), nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "Average time per request".yellow(), format_time(global_stats.mean_duration(), nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "Sample standard deviation".yellow(), format_time(global_stats.stdev_duration(), nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "99.0'th percentile".yellow(), format_time(global_stats.value_at_quantile(0.99), nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "99.5'th percentile".yellow(), format_time(global_stats.value_at_quantile(0.995), nanosec).purple(), width2 = 25);
println!("{:width2$} {}", "99.9'th percentile".yellow(), format_time(global_stats.value_at_quantile(0.999), nanosec).purple(), width2 = 25);
}

fn compare_benchmark(list_reports: &[Vec<Report>], compare_path_option: Option<&str>, threshold_option: Option<&str>) {
Expand Down