From 6546b215811df836eae44fa7762979716e8f4af4 Mon Sep 17 00:00:00 2001
From: Carl Lerche <me@carllerche.com>
Date: Wed, 21 Jun 2023 01:06:25 +0000
Subject: [PATCH] wip

---
 tokio/src/runtime/scheduler/multi_thread/stats.rs  | 1 -
 tokio/src/runtime/scheduler/multi_thread/worker.rs | 3 +++
 tokio/src/runtime/task/core.rs                     | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tokio/src/runtime/scheduler/multi_thread/stats.rs b/tokio/src/runtime/scheduler/multi_thread/stats.rs
index cc641df54..ce215e3fd 100644
--- a/tokio/src/runtime/scheduler/multi_thread/stats.rs
+++ b/tokio/src/runtime/scheduler/multi_thread/stats.rs
@@ -1,7 +1,6 @@
 use crate::runtime::{Config, MetricsBatch, WorkerMetrics};
 
 use std::cmp;
-use std::f32::consts::E;
 use std::time::{Duration, Instant};
 
 /// Per-worker statistics. This is used for both tuning the scheduler and
diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs
index 1029c77d5..7c3cd6c55 100644
--- a/tokio/src/runtime/scheduler/multi_thread/worker.rs
+++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs
@@ -826,6 +826,9 @@ impl Worker {
         #[cfg(loom)]
         const ROUNDS: usize = 1;
 
+        debug_assert!(core.lifo_slot.is_none());
+        debug_assert!(core.run_queue.is_empty());
+
         if !self.transition_to_searching(cx, core) {
             return None;
         }
diff --git a/tokio/src/runtime/task/core.rs b/tokio/src/runtime/task/core.rs
index 640ed42bb..779cfa90a 100644
--- a/tokio/src/runtime/task/core.rs
+++ b/tokio/src/runtime/task/core.rs
@@ -29,6 +29,7 @@ use std::task::{Context, Poll, Waker};
 /// Any changes to the layout of this struct _must_ also be reflected in the
 /// const fns in raw.rs.
 #[repr(C)]
+#[repr(align(128))]
 pub(super) struct Cell<T: Future, S> {
     /// Hot task state data
     pub(super) header: Header,