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Customisable shuffling cache size (#4081)

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This PR enables the user to adjust the shuffling cache size.

This is useful for some HTTP API requests which require re-computing old shufflings. This PR currently optimizes the
beacon/states/{state_id}/committees HTTP API by first checking the cache before re-building shuffling.

If the shuffling is set to a non-default value, then the HTTP API request will also fill the cache when as it constructs new shufflings.

If the CLI flag is not present or the value is set to the default of 16 the default behaviour is observed.


Co-authored-by: Michael Sproul <michael@sigmaprime.io>
This commit is contained in:
Age Manning
2023-03-21 05:14:59 +00:00
parent 76a2007b64
commit 785a9171e6
8 changed files with 151 additions and 42 deletions
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3
beacon_node/beacon_chain/src/builder.rs
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@@ -765,6 +765,7 @@ where
let genesis_time = head_snapshot.beacon_state.genesis_time();
let head_for_snapshot_cache = head_snapshot.clone();
let canonical_head = CanonicalHead::new(fork_choice, Arc::new(head_snapshot));
let shuffling_cache_size = self.chain_config.shuffling_cache_size;
let beacon_chain = BeaconChain {
spec: self.spec,
@@ -818,7 +819,7 @@ where
DEFAULT_SNAPSHOT_CACHE_SIZE,
head_for_snapshot_cache,
)),
shuffling_cache: TimeoutRwLock::new(ShufflingCache::new()),
shuffling_cache: TimeoutRwLock::new(ShufflingCache::new(shuffling_cache_size)),
eth1_finalization_cache: TimeoutRwLock::new(Eth1FinalizationCache::new(log.clone())),
beacon_proposer_cache: <_>::default(),
block_times_cache: <_>::default(),