Skip to content

tracing-subscriber: count numbers of enters in Timings #2944

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Jun 3, 2025
+16 −6
Merged

tracing-subscriber: count numbers of enters in Timings #2944

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
d3e6cfc
tracing-subscriber: count numbers of enters in `Timings`
mladedav Apr 20, 2024
9a8c852
Merge branch 'master' into dm/timings
hawkw May 3, 2024
71c3737
Merge branch 'master' into dm/timings
davidbarsky May 25, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
22 changes: 16 additions & 6 deletions tracing-subscriber/src/fmt/fmt_subscriber.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -891,9 +891,12 @@ where
let span = ctx.span(id).expect("Span not found, this is a bug");
let mut extensions = span.extensions_mut();
if let Some(timings) = extensions.get_mut::<Timings>() {
let now = Instant::now();
timings.idle += (now - timings.last).as_nanos() as u64;
timings.last = now;
if timings.entered_count == 0 {
let now = Instant::now();
timings.idle += (now - timings.last).as_nanos() as u64;
timings.last = now;
}
timings.entered_count += 1;
}

if self.fmt_span.trace_enter() {
Expand All @@ -911,9 +914,12 @@ where
let span = ctx.span(id).expect("Span not found, this is a bug");
let mut extensions = span.extensions_mut();
if let Some(timings) = extensions.get_mut::<Timings>() {
let now = Instant::now();
timings.busy += (now - timings.last).as_nanos() as u64;
timings.last = now;
timings.entered_count -= 1;
if timings.entered_count == 0 {
let now = Instant::now();
timings.busy += (now - timings.last).as_nanos() as u64;
timings.last = now;
}
}

if self.fmt_span.trace_exit() {
Expand All @@ -935,7 +941,9 @@ where
busy,
mut idle,
last,
entered_count,
} = *timing;
debug_assert_eq!(entered_count, 0);
idle += (Instant::now() - last).as_nanos() as u64;

let t_idle = field::display(TimingDisplay(idle));
Expand Down Expand Up @@ -1225,6 +1233,7 @@ struct Timings {
idle: u64,
busy: u64,
last: Instant,
entered_count: u64,
}

impl Timings {
Expand All @@ -1233,6 +1242,7 @@ impl Timings {
idle: 0,
busy: 0,
last: Instant::now(),
entered_count: 0,
}
}
}
Expand Down