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-rw-r--r--crates/ra_prof/src/stop_watch.rs13
1 files changed, 10 insertions, 3 deletions
diff --git a/crates/ra_prof/src/stop_watch.rs b/crates/ra_prof/src/stop_watch.rs
index 8b8ec25a5..5e276190e 100644
--- a/crates/ra_prof/src/stop_watch.rs
+++ b/crates/ra_prof/src/stop_watch.rs
@@ -23,9 +23,14 @@ impl StopWatch {
23 pub fn start() -> StopWatch { 23 pub fn start() -> StopWatch {
24 #[cfg(target_os = "linux")] 24 #[cfg(target_os = "linux")]
25 let counter = { 25 let counter = {
26 let mut counter = perf_event::Builder::new().build().ok(); 26 let mut counter = perf_event::Builder::new()
27 .build()
28 .map_err(|err| eprintln!("Failed to create perf counter: {}", err))
29 .ok();
27 if let Some(counter) = &mut counter { 30 if let Some(counter) = &mut counter {
28 let _ = counter.enable(); 31 if let Err(err) = counter.enable() {
32 eprintln!("Failed to start perf counter: {}", err)
33 }
29 } 34 }
30 counter 35 counter
31 }; 36 };
@@ -47,7 +52,9 @@ impl StopWatch {
47 let time = self.time.elapsed(); 52 let time = self.time.elapsed();
48 53
49 #[cfg(target_os = "linux")] 54 #[cfg(target_os = "linux")]
50 let instructions = self.counter.as_mut().and_then(|it| it.read().ok()); 55 let instructions = self.counter.as_mut().and_then(|it| {
56 it.read().map_err(|err| eprintln!("Failed to read perf counter: {}", err)).ok()
57 });
51 #[cfg(not(target_os = "linux"))] 58 #[cfg(not(target_os = "linux"))]
52 let instructions = None; 59 let instructions = None;
53 60