rust/neon
1
0
Fork 0
mirror of https://github.com/neondatabase/neon.git synced 2026-05-18 05:30:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

Revert "yield to executor every time we move backwards"

Browse Source 
This reverts commit 49bf66a467.
This commit is contained in:
Christian Schwarz
2023-10-04 15:54:57 +00:00
parent c5f24bab55
commit edf24e7afc
1 changed files with 1 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
pageserver/src/page_cache.rs
View File

@@ -884,21 +884,9 @@ impl PageCache {
) -> anyhow::Result<(usize, tokio::sync::RwLockWriteGuard<SlotInner>)> {
let iter_limit = self.slots.len() * 10;
let mut iters = 0;
let mut last_slot_idx = None;
loop {
iters += 1;
let slot_idx = {
let next_idx =
self.next_evict_slot.fetch_add(1, Ordering::Relaxed) % self.slots.len();
match (last_slot_idx, next_idx) {
(Some(x), y) if x > y => {
tokio::task::yield_now().await;
}
(None | Some(_), _) => {}
}
last_slot_idx = Some(next_idx);
next_idx
};
let slot_idx = self.next_evict_slot.fetch_add(1, Ordering::Relaxed) % self.slots.len();
let slot = &self.slots[slot_idx];