From: Matt Corallo Date: Mon, 12 Jul 2021 02:23:27 +0000 (+0000) Subject: Decrease the size of Node from 48 to 16 (and a map entry from 72 to 36) X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=85bcd9e15da4aca021ff67356c3725d3ffe95e13;p=dnsseed-rust Decrease the size of Node from 48 to 16 (and a map entry from 72 to 36) --- diff --git a/src/datastore.rs b/src/datastore.rs index 1f22210..c55e47d 100644 --- a/src/datastore.rs +++ b/src/datastore.rs @@ -1,8 +1,9 @@ use std::cmp; +use std::convert::TryInto; use std::collections::{HashSet, HashMap, hash_map}; use std::sync::{Arc, RwLock}; use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6}; -use std::time::{Duration, Instant}; +use std::time::Instant; use std::io::{BufRead, BufReader}; use bitcoin::network::address::{Address, AddrV2Message}; @@ -121,12 +122,36 @@ pub enum RegexSetting { } struct Node { - last_update: Instant, - last_good: Instant, // Ignored unless state is Good or WasGood - last_services: u64, + // Times in seconds-since-startup + last_good: u32, // Ignored unless state is Good or WasGood + // Since everything is is 4-byte aligned, using a u64 for services blows up our size + // substantially. Instead, use a u32 pair and bit shift as needed. + last_services: (u32, u32), state: AddressState, queued: bool, } +impl Node { + #[inline] + fn last_services(&self) -> u64 { + ((self.last_services.0 as u64) << 32) | + ((self.last_services.1 as u64) ) + } + #[inline] + fn services(inp: u64) -> (u32, u32) { + ( + ((inp & 0xffffffff00000000) >> 32) as u32, + ((inp & 0x00000000ffffffff) ) as u32 + ) + } +} + +#[test] +fn services_test() { + assert_eq!( + Node { last_good: 0, state: AddressState::Good, queued: false, last_services: Node::services(0x1badcafedeadbeef) } + .last_services(), + 0x1badcafedeadbeef); +} /// Essentially SocketAddr but without a traffic class or scope #[derive(Clone, PartialEq, Eq, Hash)] @@ -200,6 +225,7 @@ pub struct Store { u64_settings: RwLock>, subver_regex: RwLock>, nodes: RwLock, + start_time: Instant, store: String, } @@ -304,14 +330,13 @@ impl Store { Some(v) => v, None => return future::ok(res), }, - last_services, - last_update: Instant::now(), - last_good: Instant::now(), + last_services: Node::services(last_services), + last_good: 0, queued: true, }; if node.state == AddressState::Good { for i in 0..64 { - if node.last_services & (1 << i) != 0 { + if node.last_services() & (1 << i) != 0 { res.good_node_services[i].insert(sockaddr.into()); } } @@ -329,6 +354,7 @@ impl Store { subver_regex: RwLock::new(Arc::new(regex)), nodes: RwLock::new(nodes), store, + start_time: Instant::now(), }) }) } @@ -355,15 +381,14 @@ impl Store { pub fn add_fresh_addrs>(&self, addresses: I) -> u64 { let mut res = 0; + let cur_time = (Instant::now() - self.start_time).as_secs().try_into().unwrap(); let mut nodes = self.nodes.write().unwrap(); - let cur_time = Instant::now(); for addr in addresses { match nodes.nodes_to_state.entry(addr.into()) { hash_map::Entry::Vacant(e) => { e.insert(Node { state: AddressState::Untested, - last_services: 0, - last_update: cur_time, + last_services: (0, 0), last_good: cur_time, queued: true, }); @@ -395,29 +420,31 @@ impl Store { pub fn set_node_state(&self, sockaddr: SocketAddr, state: AddressState, services: u64) -> AddressState { let addr: SockAddr = sockaddr.into(); - let now = Instant::now(); + + let now = (Instant::now() - self.start_time).as_secs().try_into().unwrap(); let mut nodes_lock = self.nodes.write().unwrap(); let nodes = nodes_lock.borrow_mut(); let state_ref = nodes.nodes_to_state.entry(addr.clone()).or_insert(Node { state: AddressState::Untested, - last_services: 0, - last_update: now, + last_services: (0, 0), last_good: now, queued: false, }); let ret = state_ref.state; + let was_good_timeout: u32 = self.get_u64(U64Setting::WasGoodTimeout) + .try_into().expect("Need WasGood timeout that fits in a u32"); if (state_ref.state == AddressState::Good || state_ref.state == AddressState::WasGood) && state != AddressState::Good - && state_ref.last_good >= now - Duration::from_secs(self.get_u64(U64Setting::WasGoodTimeout)) { + && state_ref.last_good >= now - was_good_timeout { state_ref.state = AddressState::WasGood; for i in 0..64 { - if state_ref.last_services & (1 << i) != 0 { + if state_ref.last_services() & (1 << i) != 0 { nodes.good_node_services[i].remove(&addr); } } - state_ref.last_services = 0; + state_ref.last_services = (0, 0); if !state_ref.queued { nodes.state_next_scan[AddressState::WasGood.to_num() as usize].push(addr); state_ref.queued = true; @@ -426,13 +453,13 @@ impl Store { state_ref.state = state; if state == AddressState::Good { for i in 0..64 { - if services & (1 << i) != 0 && state_ref.last_services & (1 << i) == 0 { + if services & (1 << i) != 0 && state_ref.last_services() & (1 << i) == 0 { nodes.good_node_services[i].insert(addr.clone()); - } else if services & (1 << i) == 0 && state_ref.last_services & (1 << i) != 0 { + } else if services & (1 << i) == 0 && state_ref.last_services() & (1 << i) != 0 { nodes.good_node_services[i].remove(&addr); } } - state_ref.last_services = services; + state_ref.last_services = Node::services(services); state_ref.last_good = now; } if !state_ref.queued { @@ -440,7 +467,6 @@ impl Store { state_ref.queued = true; } } - state_ref.last_update = now; ret } @@ -485,7 +511,7 @@ impl Store { nodes_buff += ","; nodes_buff += &node.state.to_num().to_string(); nodes_buff += ","; - nodes_buff += &node.last_services.to_string(); + nodes_buff += &node.last_services().to_string(); nodes_buff += "\n"; } }