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some optimizations to get_auth_chain()

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Signed-off-by: Jason Volk <jason@zemos.net>
This commit is contained in:
Jason Volk 2024-04-10 13:55:09 -07:00 committed by June
parent 678d87ced1
commit dba0575e75
4 changed files with 71 additions and 46 deletions
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8
src/api/server_server.rs
View file

@ -734,7 +734,7 @@ pub async fn get_event_authorization_route(
let auth_chain_ids = services()
.rooms
.auth_chain
.get_auth_chain(room_id, vec![Arc::from(&*body.event_id)])
.event_ids_iter(room_id, vec![Arc::from(&*body.event_id)])
.await?;
Ok(get_event_authorization::v1::Response {
@ -794,7 +794,7 @@ pub async fn get_room_state_route(body: Ruma<get_room_state::v1::Request>) -> Re
let auth_chain_ids = services()
.rooms
.auth_chain
.get_auth_chain(&body.room_id, vec![Arc::from(&*body.event_id)])
.event_ids_iter(&body.room_id, vec![Arc::from(&*body.event_id)])
.await?;
Ok(get_room_state::v1::Response {
@ -854,7 +854,7 @@ pub async fn get_room_state_ids_route(
let auth_chain_ids = services()
.rooms
.auth_chain
.get_auth_chain(&body.room_id, vec![Arc::from(&*body.event_id)])
.event_ids_iter(&body.room_id, vec![Arc::from(&*body.event_id)])
.await?;
Ok(get_room_state_ids::v1::Response {
@ -1142,7 +1142,7 @@ async fn create_join_event(
let auth_chain_ids = services()
.rooms
.auth_chain
.get_auth_chain(room_id, state_ids.values().cloned().collect())
.event_ids_iter(room_id, state_ids.values().cloned().collect())
.await?;
services().sending.send_pdu_room(room_id, &pdu_id)?;

2
src/service/admin/debug.rs
View file

@ -104,7 +104,7 @@ pub(crate) async fn process(command: DebugCommand, body: Vec<&str>) -> Result<Ro
let count = services()
.rooms
.auth_chain
.get_auth_chain(room_id, vec![event_id])
.event_ids_iter(room_id, vec![event_id])
.await?
.count();
let elapsed = start.elapsed();

103
src/service/rooms/auth_chain/mod.rs
View file

@ -15,28 +15,47 @@ pub struct Service {
}
impl Service {
pub async fn get_auth_chain<'a>(
&self, room_id: &RoomId, starting_events: Vec<Arc<EventId>>,
pub async fn event_ids_iter<'a>(
&self, room_id: &RoomId, starting_events_: Vec<Arc<EventId>>,
) -> Result<impl Iterator<Item = Arc<EventId>> + 'a> {
const NUM_BUCKETS: usize = 50;
let mut buckets = vec![BTreeSet::new(); NUM_BUCKETS];
let mut i = 0;
for id in starting_events {
let short = services().rooms.short.get_or_create_shorteventid(&id)?;
let bucket_id = (short % NUM_BUCKETS as u64) as usize;
buckets[bucket_id].insert((short, id.clone()));
i += 1;
if i % 100 == 0 {
tokio::task::yield_now().await;
}
let mut starting_events: Vec<&EventId> = Vec::with_capacity(starting_events_.len());
for starting_event in &starting_events_ {
starting_events.push(starting_event);
}
let mut full_auth_chain = HashSet::new();
Ok(self
.get_auth_chain(room_id, &starting_events)
.await?
.into_iter()
.filter_map(move |sid| services().rooms.short.get_eventid_from_short(sid).ok()))
}
pub async fn get_auth_chain(&self, room_id: &RoomId, starting_events: &[&EventId]) -> Result<Vec<u64>> {
const NUM_BUCKETS: usize = 50; //TODO: change possible w/o disrupting db?
const BUCKET: BTreeSet<(u64, &EventId)> = BTreeSet::new();
let started = std::time::Instant::now();
let mut buckets = [BUCKET; NUM_BUCKETS];
for (i, short) in services()
.rooms
.short
.multi_get_or_create_shorteventid(starting_events)?
.iter()
.enumerate()
{
let bucket = short % NUM_BUCKETS as u64;
buckets[bucket as usize].insert((*short, starting_events[i]));
}
debug!(
starting_events = ?starting_events.len(),
elapsed = ?started.elapsed(),
"start",
);
let mut hits = 0;
let mut misses = 0;
let mut full_auth_chain = Vec::new();
for chunk in buckets {
if chunk.is_empty() {
continue;
@ -48,68 +67,68 @@ impl Service {
.auth_chain
.get_cached_eventid_authchain(&chunk_key)?
{
hits += 1;
full_auth_chain.extend(cached.iter().copied());
hits += 1;
continue;
}
misses += 1;
let mut chunk_cache = HashSet::new();
let mut hits2 = 0;
let mut misses2 = 0;
let mut i = 0;
let mut chunk_cache = Vec::new();
for (sevent_id, event_id) in chunk {
if let Some(cached) = services()
.rooms
.auth_chain
.get_cached_eventid_authchain(&[sevent_id])?
{
hits2 += 1;
chunk_cache.extend(cached.iter().copied());
hits2 += 1;
} else {
misses2 += 1;
let auth_chain = Arc::new(self.get_auth_chain_inner(room_id, &event_id)?);
let auth_chain = self.get_auth_chain_inner(room_id, event_id)?;
services()
.rooms
.auth_chain
.cache_auth_chain(vec![sevent_id], &auth_chain)?;
chunk_cache.extend(auth_chain.iter());
misses2 += 1;
debug!(
event_id = ?event_id,
chain_length = ?auth_chain.len(),
chunk_cache_length = ?chunk_cache.len(),
elapsed = ?started.elapsed(),
"Cache missed event"
);
chunk_cache.extend(auth_chain.iter());
i += 1;
if i % 100 == 0 {
tokio::task::yield_now().await;
}
};
}
chunk_cache.sort_unstable();
chunk_cache.dedup();
services()
.rooms
.auth_chain
.cache_auth_chain_vec(chunk_key, &chunk_cache)?;
full_auth_chain.extend(chunk_cache.iter());
misses += 1;
debug!(
chunk_cache_length = ?chunk_cache.len(),
hits = ?hits2,
misses = ?misses2,
elapsed = ?started.elapsed(),
"Chunk missed",
);
let chunk_cache = Arc::new(chunk_cache);
services()
.rooms
.auth_chain
.cache_auth_chain(chunk_key, &chunk_cache)?;
full_auth_chain.extend(chunk_cache.iter());
}
full_auth_chain.sort();
full_auth_chain.dedup();
debug!(
chain_length = ?full_auth_chain.len(),
hits = ?hits,
misses = ?misses,
"Auth chain stats",
elapsed = ?started.elapsed(),
"done",
);
Ok(full_auth_chain
.into_iter()
.filter_map(move |sid| services().rooms.short.get_eventid_from_short(sid).ok()))
Ok(full_auth_chain)
}
#[tracing::instrument(skip(self, event_id))]
@ -155,4 +174,10 @@ impl Service {
self.db
.cache_auth_chain(key, auth_chain.iter().copied().collect::<Arc<[u64]>>())
}
#[tracing::instrument(skip(self))]
pub fn cache_auth_chain_vec(&self, key: Vec<u64>, auth_chain: &Vec<u64>) -> Result<()> {
self.db
.cache_auth_chain(key, auth_chain.iter().copied().collect::<Arc<[u64]>>())
}
}

4
src/service/rooms/event_handler/mod.rs
View file

@ -578,7 +578,7 @@ impl Service {
services()
.rooms
.auth_chain
.get_auth_chain(room_id, starting_events)
.event_ids_iter(room_id, starting_events)
.await?
.collect(),
);
@ -909,7 +909,7 @@ impl Service {
services()
.rooms
.auth_chain
.get_auth_chain(room_id, state.iter().map(|(_, id)| id.clone()).collect())
.event_ids_iter(room_id, state.iter().map(|(_, id)| id.clone()).collect())
.await?
.collect(),
);