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consensus: prioritize finality work over block import in queue #7307
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bkchr
approved these changes
Oct 12, 2020
| @@ -46,7 +48,8 @@ pub struct BasicQueue<B: BlockT, Transaction> { | |||
| impl<B: BlockT, Transaction> Drop for BasicQueue<B, Transaction> { | |||
| fn drop(&mut self) { | |||
| // Flush the queue and close the receiver to terminate the future. | |||
| self.sender.close_channel(); | |||
| self.finality_sender.close_channel(); | |||
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https://docs.rs/futures-channel/0.3.6/src/futures_channel/mpsc/mod.rs.html#991
Actually that is done automatically :P
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I guess this was done explicitly in case there's more than one instance of the sender. I don't really have a strong opinion on this.
| use worker_messages::*; | ||
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| let (finality_sender, mut finality_port) = | ||
| tracing_unbounded("mpsc_import_queue_worker_finality"); |
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The channel is mpsc but yeah in practice there's only one producer. But all tracing_unbounded metrics have the mpsc prefix 🤷.
octol
approved these changes
Oct 16, 2020
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The import queue should prioritize finality work over block import since finality work is less common and lighter than block import (especially during major sync), and performing the finality work can then lead to faster block import (or rather it solves slowdowns caused by longer stretches of unfinalized blocks).