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Overseer: subsystems communicate directly (#2227)

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* overseer: pass messages directly between subsystems

* test that message is held on to

* Update node/overseer/src/lib.rs

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>

* give every subsystem an unbounded sender too

* remove metered_channel::name

1. we don't provide good names
2. these names are never used anywhere

* unused mut

* remove unnecessary &mut

* subsystem unbounded_send

* remove unused MaybeTimer

We have channel size metrics that serve the same purpose better now and the implementation of message timing was pretty ugly.

* remove comment

* split up senders and receivers

* update metrics

* fix tests

* fix test subsystem context

* fix flaky test

* fix docs

* doc

* use select_biased to favor signals

* Update node/subsystem/src/lib.rs

Co-authored-by: Andronik Ordian <write@reusable.software>

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>
Co-authored-by: Andronik Ordian <write@reusable.software>
This commit is contained in:
Robert Habermeier
2021-03-28 17:55:10 +02:00
committed by GitHub
parent c6f07d8f31
commit 5952e790fa
9 changed files with 1353 additions and 690 deletions
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polkadot/node/metered-channel/src/unbounded.rs
+3 -4
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@@ -25,10 +25,9 @@ use super::Meter;
/// Create a wrapped `mpsc::channel` pair of `MeteredSender` and `MeteredReceiver`.
pub fn unbounded<T>(name: &'static str) -> (UnboundedMeteredSender<T>, UnboundedMeteredReceiver<T>) {
pub fn unbounded<T>() -> (UnboundedMeteredSender<T>, UnboundedMeteredReceiver<T>) {
let (tx, rx) = mpsc::unbounded();
let mut shared_meter = Meter::default();
shared_meter.name = name;
let shared_meter = Meter::default();
let tx = UnboundedMeteredSender { meter: shared_meter.clone(), inner: tx };
let rx = UnboundedMeteredReceiver { meter: shared_meter, inner: rx };
(tx, rx)
@@ -147,7 +146,7 @@ impl<T> UnboundedMeteredSender<T> {
/// Attempt to send message or fail immediately.
pub fn unbounded_send(&mut self, msg: T) -> result::Result<(), mpsc::TrySendError<T>> {
pub fn unbounded_send(&self, msg: T) -> result::Result<(), mpsc::TrySendError<T>> {
self.meter.note_sent();
self.inner.unbounded_send(msg).map_err(|e| {
self.meter.retract_sent();