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Auto merge of #10589 - fitzgen:lock-stdout-when-printing-profile, r=larsbergstrom

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Take the stdout lock when printing profile data

Acquiring the stdout lock while printing the profile data prevents other
messages printed to stdout from being interleaved with prints from elsewhere.

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This commit is contained in:
bors-servo 2016-04-15 01:03:54 +05:30
commit d9ffefe562
1 changed files with 10 additions and 5 deletions
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15
components/profile/time.rs
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@ -12,6 +12,7 @@ use profile_traits::time::{TimerMetadataReflowType, TimerMetadataFrameType};
use std::borrow::ToOwned;
use std::cmp::Ordering;
use std::collections::BTreeMap;
use std::io::{self, Write};
use std::time::Duration;
use std::{thread, f64};
use std_time::precise_time_ns;
@ -251,10 +252,13 @@ impl Profiler {
}
fn print_buckets(&mut self) {
println!("{:35} {:14} {:9} {:30} {:15} {:15} {:-15} {:-15} {:-15}",
let stdout = io::stdout();
let mut lock = stdout.lock();
writeln!(&mut lock, "{:35} {:14} {:9} {:30} {:15} {:15} {:-15} {:-15} {:-15}",
"_category_", "_incremental?_", "_iframe?_",
" _url_", " _mean (ms)_", " _median (ms)_",
" _min (ms)_", " _max (ms)_", " _events_");
" _min (ms)_", " _max (ms)_", " _events_").unwrap();
for (&(ref category, ref meta), ref mut data) in &mut self.buckets {
data.sort_by(|a, b| {
if a < b {
@ -270,11 +274,12 @@ impl Profiler {
data[data_len / 2],
data.iter().fold(f64::INFINITY, |a, &b| a.min(b)),
data.iter().fold(-f64::INFINITY, |a, &b| a.max(b)));
println!("{:-35}{} {:15.4} {:15.4} {:15.4} {:15.4} {:15}",
category.format(), meta.format(), mean, median, min, max, data_len);
writeln!(&mut lock, "{:-35}{} {:15.4} {:15.4} {:15.4} {:15.4} {:15}",
category.format(), meta.format(), mean, median, min, max,
data_len).unwrap();
}
}
println!("");
writeln!(&mut lock, "").unwrap();
}
}