Method sample

crates/wasmtime/src/runtime/profiling.rs:203–214

Add a sample to the profile. This function collects a backtrace from any stack frames for allowed modules on the current stack. It should typically be called from a callback registered using [`Store::epoch_deadline_callback()`](crate::Store::epoch_deadline_callback). The `delta` parameter is the amount of CPU time that was used by this guest since the previous sample. It is allowed to pass `Durat

(&mut self, store: impl AsContext, delta: Duration)

    /// guest since the previous sample. It is allowed to pass `Duration::ZERO`
    /// here if recording CPU usage information is not needed.
    pub fn sample(&mut self, store: impl AsContext, delta: Duration) {
        let now = Timestamp::from_nanos_since_reference(
            self.start.elapsed().as_nanos().try_into().unwrap(),
        );
        let backtrace = Backtrace::new(store.as_context().0);
        let frames = lookup_frames(&self.modules, &backtrace);
        let stack = self
            .profile
            .intern_stack_frames(self.thread, frames.into_iter());
        self.profile
            .add_sample(self.thread, now, stack, delta.into(), 1);
    }

    /// Add a marker for transitions between guest and host to the profile.
    /// This function should typically be called from a callback registered