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Lowering complexity of request_blocks

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This commit is contained in:
Tomasz Drwięga 2016-03-01 22:03:29 +01:00
parent 30e7ac8d6d
commit 083747dc67
1 changed files with 82 additions and 77 deletions
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33
sync/src/chain.rs
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@ -635,16 +635,7 @@ impl ChainSync {
match self.last_imported_block { None => 0, Some(x) => x }
}
/// Find some headers or blocks to download for a peer.
fn request_blocks(&mut self, io: &mut SyncIo, peer_id: PeerId, ignore_others: bool) {
self.clear_peer_download(peer_id);
if io.chain().queue_info().is_full() {
self.pause_sync();
return;
}
// check to see if we need to download any block bodies first
fn find_block_bodies_hashes_to_request(&self, ignore_others: bool) -> (Vec<H256>, Vec<BlockNumber>) {
let mut needed_bodies: Vec<H256> = Vec::new();
let mut needed_numbers: Vec<BlockNumber> = Vec::new();
@ -664,18 +655,33 @@ impl ChainSync {
}
}
}
(needed_bodies, needed_numbers)
}
/// Find some headers or blocks to download for a peer.
fn request_blocks(&mut self, io: &mut SyncIo, peer_id: PeerId, ignore_others: bool) {
self.clear_peer_download(peer_id);
if io.chain().queue_info().is_full() {
self.pause_sync();
return;
}
// check to see if we need to download any block bodies first
let (needed_bodies, needed_numbers) = self.find_block_bodies_hashes_to_request(ignore_others);
if !needed_bodies.is_empty() {
let (head, _) = self.headers.range_iter().next().unwrap();
if needed_numbers.first().unwrap() - head > self.max_download_ahead_blocks as BlockNumber {
trace!(target: "sync", "{}: Stalled download ({} vs {}), helping with downloading block bodies", peer_id, needed_numbers.first().unwrap(), head);
self.request_blocks(io, peer_id, true);
return;
}
} else {
self.downloading_bodies.extend(needed_numbers.iter());
replace(&mut self.peers.get_mut(&peer_id).unwrap().asking_blocks, needed_numbers);
self.request_bodies(io, peer_id, needed_bodies);
}
else {
return;
}
// check if need to download headers
let mut start = 0;
if !self.have_common_block {
@ -733,7 +739,6 @@ impl ChainSync {
self.request_headers_by_number(io, peer_id, start, 1, 0, false);
}
}
}
/// Clear all blocks/headers marked as being downloaded by a peer.
fn clear_peer_download(&mut self, peer_id: PeerId) {