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Merged
mockersf merged 5 commits into from
Jan 17, 2026
Merged

frame time from MangoHud #75

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d9bf2de
log from mangohud and read csv
mockersf Jan 17, 2026
cced111
collect frame time from mangohud for large scenes
mockersf Jan 17, 2026
23fba22
fix mangohud config
mockersf Jan 17, 2026
2ddfb58
also mangohud for stress tests
mockersf Jan 17, 2026
a69339c
frame time, not fps
mockersf Jan 17, 2026
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40 changes: 36 additions & 4 deletions Cargo.lock
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1 change: 1 addition & 0 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -20,3 +20,4 @@ nvml-wrapper = "0.11.0"
regex = "1.11"
git2 = "0.20"
fs_extra = "1.3.0"
csv = "1.3"
64 changes: 62 additions & 2 deletions src/metrics/large_scenes.rs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
use std::{
collections::HashMap,
io::Write,
io::{BufRead, Write},
path::{Path, PathBuf},
thread,
time::{Duration, Instant},
Expand Down Expand Up @@ -122,9 +122,17 @@ impl Metrics for LargeScene {
.into_iter()
.flat_map(|f| ["--features".to_string(), f]);

let _guard = sh.push_env(
"MANGOHUD_CONFIG",
format!(
"output_folder={},autostart_log=10",
std::env::current_dir().unwrap().display()
),
);

let cmd = cmd!(
sh,
"xvfb-run cargo run --release {features...} --package {scene} -- {parameters...}"
"xvfb-run mangohud cargo run --release {features...} --package {scene} -- {parameters...}"
);
let mut results = HashMap::new();

Expand Down Expand Up @@ -228,6 +236,58 @@ impl Metrics for LargeScene {
results.insert(format!("{key}.duration"), elapsed.as_millis() as u64);
results.insert(format!("{key}.frames"), self.nb_frames as u64);

if let Some(last_modified_file) = std::fs::read_dir(".")
.expect("Couldn't access local directory")
.flatten()
.filter(|f| {
f.metadata().unwrap().is_file()
&& f.file_name().into_string().unwrap().ends_with(".csv")
})
.max_by_key(|x| x.metadata().unwrap().modified().unwrap())
{
let csv_file = std::fs::File::open(last_modified_file.path()).unwrap();
// Skip first two lines as they're info about system
let mut reader = std::io::BufReader::new(csv_file);
let mut tmp = String::new();
let _ = reader.read_line(&mut tmp);
let _ = reader.read_line(&mut tmp);
let mut rdr = csv::ReaderBuilder::new().from_reader(reader);
let frame_times = rdr
.records()
.flatten()
.flat_map(|record| record.get(1).unwrap().parse::<f32>())
.collect::<Vec<_>>();

results.insert(
format!("{key}.frame_time.mean"),
(statistical::mean(&frame_times) * 1000.0) as u64,
);
results.insert(
format!("{key}.frame_time.median"),
(statistical::median(&frame_times) * 1000.0) as u64,
);
results.insert(
format!("{key}.frame_time.min"),
frame_times
.iter()
.map(|d| (d * 1000.0) as u64)
.min()
.unwrap(),
);
results.insert(
format!("{key}.frame_time.max"),
frame_times
.iter()
.map(|d| (d * 1000.0) as u64)
.max()
.unwrap(),
);
results.insert(
format!("{key}.frame_time.std_dev"),
(statistical::standard_deviation(&frame_times, None) * 1000.0) as u64,
);
}

results
}
}
Expand Down
62 changes: 61 additions & 1 deletion src/metrics/stress_tests.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -118,9 +118,17 @@ impl Metrics for StressTest {
.into_iter()
.flat_map(|f| ["--features".to_string(), f]);

let _guard = sh.push_env(
"MANGOHUD_CONFIG",
format!(
"output_folder={},autostart_log=1",
std::env::current_dir().unwrap().display()
),
);

let cmd = cmd!(
sh,
"xvfb-run cargo run --release {features...} --example {stress_tests} -- {parameters...}"
"xvfb-run mangohud cargo run --release {features...} --example {stress_tests} -- {parameters...}"
);
let mut results = HashMap::new();

Expand Down Expand Up @@ -260,6 +268,58 @@ impl Metrics for StressTest {
results.insert(format!("{key}.duration"), elapsed.as_millis() as u64);
results.insert(format!("{key}.frames"), self.nb_frames as u64);

if let Some(last_modified_file) = std::fs::read_dir(".")
.expect("Couldn't access local directory")
.flatten()
.filter(|f| {
f.metadata().unwrap().is_file()
&& f.file_name().into_string().unwrap().ends_with(".csv")
})
.max_by_key(|x| x.metadata().unwrap().modified().unwrap())
{
let csv_file = std::fs::File::open(last_modified_file.path()).unwrap();
// Skip first two lines as they're info about system
let mut reader = std::io::BufReader::new(csv_file);
let mut tmp = String::new();
let _ = reader.read_line(&mut tmp);
let _ = reader.read_line(&mut tmp);
let mut rdr = csv::ReaderBuilder::new().from_reader(reader);
let frame_times = rdr
.records()
.flatten()
.flat_map(|record| record.get(1).unwrap().parse::<f32>())
.collect::<Vec<_>>();

results.insert(
format!("{key}.frame_time.mean"),
(statistical::mean(&frame_times) * 1000.0) as u64,
);
results.insert(
format!("{key}.frame_time.median"),
(statistical::median(&frame_times) * 1000.0) as u64,
);
results.insert(
format!("{key}.frame_time.min"),
frame_times
.iter()
.map(|d| (d * 1000.0) as u64)
.min()
.unwrap(),
);
results.insert(
format!("{key}.frame_time.max"),
frame_times
.iter()
.map(|d| (d * 1000.0) as u64)
.max()
.unwrap(),
);
results.insert(
format!("{key}.frame_time.std_dev"),
(statistical::standard_deviation(&frame_times, None) * 1000.0) as u64,
);
}

results
}
}
Expand Down