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Allow extra lookahead blocks in the verifier, state, and block commit task queues (#5465)

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teor 2022-10-25 00:55:57 +10:00 committed by GitHub
parent a2dba8cc5d
commit 737fbac3fc
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1 changed files with 4 additions and 3 deletions
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7
zebrad/src/components/sync/downloads.rs
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@ -33,12 +33,13 @@ use crate::components::sync::{
type BoxError = Box<dyn std::error::Error + Send + Sync + 'static>;
/// A multiplier used to calculate the extra number of blocks we allow in the
/// verifier and state pipelines, on top of the lookahead limit.
/// verifier, state, and block commit pipelines, on top of the lookahead limit.
///
/// The extra number of blocks is calculated using
/// `lookahead_limit * VERIFICATION_PIPELINE_SCALING_MULTIPLIER`.
///
/// This allows the verifier and state queues to hold a few extra tips responses worth of blocks,
/// This allows the verifier and state queues, and the block commit channel,
/// to hold a few extra tips responses worth of blocks,
/// even if the syncer queue is full. Any unused capacity is shared between both queues.
///
/// If this capacity is exceeded, the downloader will start failing download blocks with
@ -48,7 +49,7 @@ type BoxError = Box<dyn std::error::Error + Send + Sync + 'static>;
/// the rest of the capacity is reserved for the other queues.
/// There is no reserved capacity for the syncer queue:
/// if the other queues stay full, the syncer will eventually time out and reset.
pub const VERIFICATION_PIPELINE_SCALING_MULTIPLIER: usize = 3;
pub const VERIFICATION_PIPELINE_SCALING_MULTIPLIER: usize = 4;
#[derive(Copy, Clone, Debug)]
pub(super) struct AlwaysHedge;