Unify route benchmarking with route tests

There's a few route tests which do the same thing as the benchmarks
as they're also a good test. However, they didn't share code, which
is somewhat wasteful, so we fix that here.

Author: TheBlueMatt

lightning/src/routing/router.rs

@@ -5542,29 +5542,15 @@ mod tests {
 				return;
 			},
 		};
+
 		let logger = ln_test_utils::TestLogger::new();
 		let graph = NetworkGraph::read(&mut d, &logger).unwrap();
-		let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
-		let random_seed_bytes = keys_manager.get_secure_random_bytes();
 
-		// First, get 100 (source, destination) pairs for which route-getting actually succeeds...
-		let mut seed = random_init_seed() as usize;
-		let nodes = graph.read_only().nodes().clone();
-		'load_endpoints: for _ in 0..10 {
-			loop {
-				seed = seed.overflowing_mul(0xdeadbeef).0;
-				let src = &PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
-				seed = seed.overflowing_mul(0xdeadbeef).0;
-				let dst = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
-				let payment_params = PaymentParameters::from_node_id(dst, 42);
-				let amt = seed as u64 % 200_000_000;
-				let params = ProbabilisticScoringParameters::default();
-				let scorer = ProbabilisticScorer::new(params, &graph, &logger);
-				if get_route(src, &payment_params, &graph.read_only(), None, amt, 42, &logger, &scorer, &random_seed_bytes).is_ok() {
-					continue 'load_endpoints;
-				}
-			}
-		}
+		let params = ProbabilisticScoringParameters::default();
+		let mut scorer = ProbabilisticScorer::new(params, &graph, &logger);
+		let features = super::InvoiceFeatures::empty();
+
+		super::bench_utils::generate_test_routes(&graph, &mut scorer, features, random_init_seed() as usize, 2);
 	}
 
 	#[test]
@@ -5581,28 +5567,12 @@ mod tests {
 		};
 		let logger = ln_test_utils::TestLogger::new();
 		let graph = NetworkGraph::read(&mut d, &logger).unwrap();
-		let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
-		let random_seed_bytes = keys_manager.get_secure_random_bytes();
-		let config = UserConfig::default();
 
-		// First, get 100 (source, destination) pairs for which route-getting actually succeeds...
-		let mut seed = random_init_seed() as usize;
-		let nodes = graph.read_only().nodes().clone();
-		'load_endpoints: for _ in 0..10 {
-			loop {
-				seed = seed.overflowing_mul(0xdeadbeef).0;
-				let src = &PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
-				seed = seed.overflowing_mul(0xdeadbeef).0;
-				let dst = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
-				let payment_params = PaymentParameters::from_node_id(dst, 42).with_features(channelmanager::provided_invoice_features(&config));
-				let amt = seed as u64 % 200_000_000;
-				let params = ProbabilisticScoringParameters::default();
-				let scorer = ProbabilisticScorer::new(params, &graph, &logger);
-				if get_route(src, &payment_params, &graph.read_only(), None, amt, 42, &logger, &scorer, &random_seed_bytes).is_ok() {
-					continue 'load_endpoints;
-				}
-			}
-		}
+		let params = ProbabilisticScoringParameters::default();
+		let mut scorer = ProbabilisticScorer::new(params, &graph, &logger);
+		let features = channelmanager::provided_invoice_features(&UserConfig::default());
+
+		super::bench_utils::generate_test_routes(&graph, &mut scorer, features, random_init_seed() as usize, 2);
 	}
 
 	#[test]
@@ -5645,7 +5615,21 @@ mod tests {
 
 #[cfg(all(test, not(feature = "no-std")))]
 pub(crate) mod bench_utils {
+	use super::*;
 	use std::fs::File;
+
+	use bitcoin::hashes::Hash;
+	use bitcoin::secp256k1::{PublicKey, Secp256k1, SecretKey};
+
+	use crate::chain::transaction::OutPoint;
+	use crate::chain::keysinterface::{EntropySource, KeysManager};
+	use crate::ln::channelmanager::{self, ChannelCounterparty, ChannelDetails};
+	use crate::ln::features::InvoiceFeatures;
+	use crate::routing::gossip::NetworkGraph;
+	use crate::util::config::UserConfig;
+	use crate::util::ser::ReadableArgs;
+	use crate::util::test_utils::TestLogger;
+
 	/// Tries to open a network graph file, or panics with a URL to fetch it.
 	pub(crate) fn get_route_file() -> Result<std::fs::File, &'static str> {
 		let res = File::open("net_graph-2023-01-18.bin") // By default we're run in RL/lightning
@@ -5668,42 +5652,18 @@ pub(crate) mod bench_utils {
 		#[cfg(not(require_route_graph_test))]
 		return res;
 	}
-}
-
-#[cfg(all(test, feature = "_bench_unstable", not(feature = "no-std")))]
-mod benches {
-	use super::*;
-	use bitcoin::hashes::Hash;
-	use bitcoin::secp256k1::{PublicKey, Secp256k1, SecretKey};
-	use crate::chain::transaction::OutPoint;
-	use crate::chain::keysinterface::{EntropySource, KeysManager};
-	use crate::ln::channelmanager::{self, ChannelCounterparty, ChannelDetails};
-	use crate::ln::features::InvoiceFeatures;
-	use crate::routing::gossip::NetworkGraph;
-	use crate::routing::scoring::{FixedPenaltyScorer, ProbabilisticScorer, ProbabilisticScoringParameters};
-	use crate::util::config::UserConfig;
-	use crate::util::logger::{Logger, Record};
-	use crate::util::ser::ReadableArgs;
 
-	use test::Bencher;
-
-	struct DummyLogger {}
-	impl Logger for DummyLogger {
-		fn log(&self, _record: &Record) {}
-	}
-
-	fn read_network_graph(logger: &DummyLogger) -> NetworkGraph<&DummyLogger> {
-		let mut d = bench_utils::get_route_file().unwrap();
-		NetworkGraph::read(&mut d, logger).unwrap()
+	pub(crate) fn read_network_graph(logger: &TestLogger) -> Result<NetworkGraph<&TestLogger>, &'static str> {
+		get_route_file().map(|mut f| NetworkGraph::read(&mut f, logger).unwrap())
 	}
 
-	fn payer_pubkey() -> PublicKey {
+	pub(crate) fn payer_pubkey() -> PublicKey {
 		let secp_ctx = Secp256k1::new();
 		PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap())
 	}
 
 	#[inline]
-	fn first_hop(node_id: PublicKey) -> ChannelDetails {
+	pub(crate) fn first_hop(node_id: PublicKey) -> ChannelDetails {
 		ChannelDetails {
 			channel_id: [0; 32],
 			counterparty: ChannelCounterparty {
@@ -5742,63 +5702,27 @@ mod benches {
 		}
 	}
 
-	#[bench]
-	fn generate_routes_with_zero_penalty_scorer(bench: &mut Bencher) {
-		let logger = DummyLogger {};
-		let network_graph = read_network_graph(&logger);
-		let scorer = FixedPenaltyScorer::with_penalty(0);
-		generate_routes(bench, &network_graph, scorer, InvoiceFeatures::empty());
-	}
-
-	#[bench]
-	fn generate_mpp_routes_with_zero_penalty_scorer(bench: &mut Bencher) {
-		let logger = DummyLogger {};
-		let network_graph = read_network_graph(&logger);
-		let scorer = FixedPenaltyScorer::with_penalty(0);
-		generate_routes(bench, &network_graph, scorer, channelmanager::provided_invoice_features(&UserConfig::default()));
-	}
-
-	#[bench]
-	fn generate_routes_with_probabilistic_scorer(bench: &mut Bencher) {
-		let logger = DummyLogger {};
-		let network_graph = read_network_graph(&logger);
-		let params = ProbabilisticScoringParameters::default();
-		let scorer = ProbabilisticScorer::new(params, &network_graph, &logger);
-		generate_routes(bench, &network_graph, scorer, InvoiceFeatures::empty());
-	}
-
-	#[bench]
-	fn generate_mpp_routes_with_probabilistic_scorer(bench: &mut Bencher) {
-		let logger = DummyLogger {};
-		let network_graph = read_network_graph(&logger);
-		let params = ProbabilisticScoringParameters::default();
-		let scorer = ProbabilisticScorer::new(params, &network_graph, &logger);
-		generate_routes(bench, &network_graph, scorer, channelmanager::provided_invoice_features(&UserConfig::default()));
-	}
-
-	fn generate_routes<S: Score>(
-		bench: &mut Bencher, graph: &NetworkGraph<&DummyLogger>, mut scorer: S,
-		features: InvoiceFeatures
-	) {
-		let nodes = graph.read_only().nodes().clone();
+	pub(crate) fn generate_test_routes<S: Score>(graph: &NetworkGraph<&TestLogger>, scorer: &mut S,
+		features: InvoiceFeatures, mut seed: usize, route_count: usize,
+	) -> Vec<(ChannelDetails, PaymentParameters, u64)> {
 		let payer = payer_pubkey();
 		let keys_manager = KeysManager::new(&[0u8; 32], 42, 42);
 		let random_seed_bytes = keys_manager.get_secure_random_bytes();
 
-		// First, get 100 (source, destination) pairs for which route-getting actually succeeds...
-		let mut routes = Vec::new();
+		let nodes = graph.read_only().nodes().clone();
 		let mut route_endpoints = Vec::new();
-		let mut seed: usize = 0xdeadbeef;
-		'load_endpoints: for _ in 0..150 {
+		let mut routes = Vec::new();
+
+		'load_endpoints: for _ in 0..route_count * 3 /2 {
 			loop {
-				seed *= 0xdeadbeef;
+				seed = seed.overflowing_mul(0xdeadbeef).0;
 				let src = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
-				seed *= 0xdeadbeef;
+				seed = seed.overflowing_mul(0xdeadbeef).0;
 				let dst = PublicKey::from_slice(nodes.unordered_keys().skip(seed % nodes.len()).next().unwrap().as_slice()).unwrap();
 				let params = PaymentParameters::from_node_id(dst, 42).with_features(features.clone());
 				let first_hop = first_hop(src);
 				let amt = seed as u64 % 1_000_000;
-				if let Ok(route) = get_route(&payer, &params, &graph.read_only(), Some(&[&first_hop]), amt, 42, &DummyLogger{}, &scorer, &random_seed_bytes) {
+				if let Ok(route) = get_route(&payer, &params, &graph.read_only(), Some(&[&first_hop]), amt, 42, &TestLogger::new(), &scorer, &random_seed_bytes) {
 					routes.push(route);
 					route_endpoints.push((first_hop, params, amt));
 					continue 'load_endpoints;
@@ -5825,10 +5749,79 @@ mod benches {
 		// selected destinations, possibly causing us to fail because, eg, the newly-selected path
 		// requires a too-high CLTV delta.
 		route_endpoints.retain(|(first_hop, params, amt)| {
-			get_route(&payer, params, &graph.read_only(), Some(&[first_hop]), *amt, 42, &DummyLogger{}, &scorer, &random_seed_bytes).is_ok()
+			get_route(&payer, params, &graph.read_only(), Some(&[first_hop]), *amt, 42, &TestLogger::new(), &scorer, &random_seed_bytes).is_ok()
 		});
-		route_endpoints.truncate(100);
-		assert_eq!(route_endpoints.len(), 100);
+		route_endpoints.truncate(route_count);
+		assert_eq!(route_endpoints.len(), route_count);
+		route_endpoints
+	}
+}
+
+#[cfg(all(test, feature = "_bench_unstable", not(feature = "no-std")))]
+mod benches {
+	use super::*;
+	use crate::chain::keysinterface::{EntropySource, KeysManager};
+	use crate::ln::channelmanager;
+	use crate::ln::features::InvoiceFeatures;
+	use crate::routing::gossip::NetworkGraph;
+	use crate::routing::scoring::{FixedPenaltyScorer, ProbabilisticScorer, ProbabilisticScoringParameters};
+	use crate::util::config::UserConfig;
+	use crate::util::logger::{Logger, Record};
+	use crate::util::test_utils::TestLogger;
+
+	use test::Bencher;
+
+	struct DummyLogger {}
+	impl Logger for DummyLogger {
+		fn log(&self, _record: &Record) {}
+	}
+
+
+	#[bench]
+	fn generate_routes_with_zero_penalty_scorer(bench: &mut Bencher) {
+		let logger = TestLogger::new();
+		let network_graph = bench_utils::read_network_graph(&logger).unwrap();
+		let scorer = FixedPenaltyScorer::with_penalty(0);
+		generate_routes(bench, &network_graph, scorer, InvoiceFeatures::empty());
+	}
+
+	#[bench]
+	fn generate_mpp_routes_with_zero_penalty_scorer(bench: &mut Bencher) {
+		let logger = TestLogger::new();
+		let network_graph = bench_utils::read_network_graph(&logger).unwrap();
+		let scorer = FixedPenaltyScorer::with_penalty(0);
+		generate_routes(bench, &network_graph, scorer, channelmanager::provided_invoice_features(&UserConfig::default()));
+	}
+
+	#[bench]
+	fn generate_routes_with_probabilistic_scorer(bench: &mut Bencher) {
+		let logger = TestLogger::new();
+		let network_graph = bench_utils::read_network_graph(&logger).unwrap();
+		let params = ProbabilisticScoringParameters::default();
+		let scorer = ProbabilisticScorer::new(params, &network_graph, &logger);
+		generate_routes(bench, &network_graph, scorer, InvoiceFeatures::empty());
+	}
+
+	#[bench]
+	fn generate_mpp_routes_with_probabilistic_scorer(bench: &mut Bencher) {
+		let logger = TestLogger::new();
+		let network_graph = bench_utils::read_network_graph(&logger).unwrap();
+		let params = ProbabilisticScoringParameters::default();
+		let scorer = ProbabilisticScorer::new(params, &network_graph, &logger);
+		generate_routes(bench, &network_graph, scorer, channelmanager::provided_invoice_features(&UserConfig::default()));
+	}
+
+
+	fn generate_routes<S: Score>(
+		bench: &mut Bencher, graph: &NetworkGraph<&TestLogger>, mut scorer: S,
+		features: InvoiceFeatures,
+	) {
+		let payer = bench_utils::payer_pubkey();
+		let keys_manager = KeysManager::new(&[0u8; 32], 42, 42);
+		let random_seed_bytes = keys_manager.get_secure_random_bytes();
+
+		// First, get 100 (source, destination) pairs for which route-getting actually succeeds...
+		let route_endpoints = bench_utils::generate_test_routes(graph, &mut scorer, features, 0xdeadbeef, 100);
 
 		// ...then benchmark finding paths between the nodes we learned.
 		let mut idx = 0;