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small refactor to shorten the lock on slot_under_contention hashset (#23891) 

* small refactor to shorten the lock on slot_under_contention hashset

* adding comments

* comments
This commit is contained in:
HaoranYi 2022-03-24 08:20:56 -05:00 committed by GitHub
parent 91c2729856
commit 90009f330b
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1 changed files with 9 additions and 16 deletions
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19
runtime/src/accounts_db.rs
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@ -4853,22 +4853,14 @@ impl AccountsDb {
slot: Slot, slot: Slot,
should_flush_f: Option<&mut impl FnMut(&Pubkey, &AccountSharedData) -> bool>, should_flush_f: Option<&mut impl FnMut(&Pubkey, &AccountSharedData) -> bool>,
) -> Option<FlushStats> { ) -> Option<FlushStats> {
let is_being_purged = { if self
let mut slots_under_contention = self
.remove_unrooted_slots_synchronization .remove_unrooted_slots_synchronization
.slots_under_contention .slots_under_contention
.lock() .lock()
.unwrap(); .unwrap()
// If we're purging this slot, don't flush it here .insert(slot)
if slots_under_contention.contains(&slot) { {
true // We have not see this slot, flush it.
} else {
slots_under_contention.insert(slot);
false
}
};
if !is_being_purged {
let flush_stats = self.accounts_cache.slot_cache(slot).map(|slot_cache| { let flush_stats = self.accounts_cache.slot_cache(slot).map(|slot_cache| {
#[cfg(test)] #[cfg(test)]
{ {
@ -4898,6 +4890,7 @@ impl AccountsDb {
.notify_all(); .notify_all();
flush_stats flush_stats
} else { } else {
// We have already seen this slot. It is already under flushing. Skip.
None None
} }
} }