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Make preemption knobs configurable; fix unused-variable warnings

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Add `Config::alloc_interval()` and `Config::timeslice_cycles()` so
callers can tune preemption sensitivity at runtime. The values flow
through `RuntimeInner` and are written into per-scheduler-thread locals
via a new `configure_preempt()` call at thread startup, keeping the hot
path free of cross-thread coherency traffic.

Fix unused-variable warnings in channel.rs by inlining `current_pid()`
directly into `te!` macro arguments — since the no-op macro arm never
evaluates its argument, no binding is needed at the call site.

Clean up a handful of dead imports exposed by the refactor.
This commit is contained in:
smarm
2026-05-25 21:52:16 +02:00
parent 3da6ffaa77
commit 2b85ef60b2
6 changed files with 75 additions and 38 deletions
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src/channel.rs
+3 -7
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@@ -98,12 +98,10 @@ impl<T> Sender<T> {
g.parked_receiver.take()
};
if let Some(pid) = unpark {
let me = crate::actor::current_pid();
crate::te!(crate::trace::Event::Send { sender: me.unwrap_or(crate::pid::Pid::new(u32::MAX, u32::MAX)), receiver: Some(pid) });
crate::te!(crate::trace::Event::Send { sender: crate::actor::current_pid().unwrap_or(crate::pid::Pid::new(u32::MAX, u32::MAX)), receiver: Some(pid) });
crate::scheduler::unpark(pid);
} else {
let me = crate::actor::current_pid();
crate::te!(crate::trace::Event::Send { sender: me.unwrap_or(crate::pid::Pid::new(u32::MAX, u32::MAX)), receiver: None });
crate::te!(crate::trace::Event::Send { sender: crate::actor::current_pid().unwrap_or(crate::pid::Pid::new(u32::MAX, u32::MAX)), receiver: None });
}
Ok(())
}
@@ -132,9 +130,7 @@ impl<T> Receiver<T> {
// Release the lock before parking — the unparker will need it.
crate::scheduler::park_current();
// Woken up — record it before looping to check the queue.
if let Some(me) = crate::actor::current_pid() {
crate::te!(crate::trace::Event::RecvWake(me));
}
crate::te!(crate::trace::Event::RecvWake(crate::actor::current_pid().unwrap()));
}
}