Testnet2 small fixes (#899)

* add hint for gcc-5 for building CUDA plugin
* add N_BLOCks comment for >=6GB GPU cards
* minor logging cleanup
* mark to be kept + reformat as "@ height [hash]"
* show CuckooNN + better wording

chain/src/pipe.rs

@@ -169,10 +169,10 @@ pub fn sync_block_header(
 pub fn process_block_header(bh: &BlockHeader, mut ctx: BlockContext) -> Result<(), Error> {
 	debug!(
 		LOGGER,
-		"pipe: process_block_header: {} at {}",
-		bh.hash(),
-		bh.height
-	);
+		"pipe: process_block_header at {} [{}]",
+		bh.height,
+		bh.hash()
+	); // keep this
 
 	check_header_known(bh.hash(), &mut ctx)?;
 	validate_header(&bh, &mut ctx)

chain/src/txhashset.rs

@@ -502,7 +502,7 @@ impl<'a> Extension<'a> {
 	pub fn rewind(&mut self, block_header: &BlockHeader) -> Result<(), Error> {
 		let hash = block_header.hash();
 		let height = block_header.height;
-		debug!(LOGGER, "Rewind to header {} at {}", hash, height);
+		debug!(LOGGER, "Rewind to header at {} [{}]", height, hash); // keep this
 
 		// rewind each MMR
 		let (out_pos_rew, kern_pos_rew) = self.commit_index.get_block_marker(&hash)?;

core/src/core/block.rs

@@ -414,7 +414,7 @@ impl Block {
 	/// Hydrate a block from a compact block.
 	/// Note: caller must validate the block themselves, we do not validate it here.
 	pub fn hydrate_from(cb: CompactBlock, txs: Vec<Transaction>) -> Block {
-		debug!(
+		trace!(
 			LOGGER,
 			"block: hydrate_from: {}, {} txs",
 			cb.hash(),

grin.toml

@@ -219,11 +219,17 @@ NUM_THREADS = 1
 #[mining.miner_plugin_config.device_parameters.0]
 #NUM_THREADS = 1
 
-#CUDA Miner (Included here for integration only, Not ready for use)
+#CUDA Miner
+#
+# Note! 4+ GB GPU cards only!
+#   If you have 6GB GPU RAM, set N_BLOCKS = 128
+#   Docs: https://github.com/tromp/cuckoo/blob/master/GPU.md
+#
 #Can currently be used only in Production (30) Mode
 #This plugin is not built by default. To build:
 #1) Ensure the latest cuda toolkit is installed
 #   (nvcc should be in your PATH)
+#   Wrong gcc? install gcc-5 g++-5; export CC=`which gcc-5`; # then build
 #2) Uncomment the 'build-cuda-plugin' feature
 #   in pow/Cargo.toml
 #

grin/src/miner.rs

@@ -221,7 +221,11 @@ impl Miner {
 						}
 					}
 				}
-				info!(LOGGER, "Mining at {} graphs per second", sps_total);
+				info!(
+					LOGGER,
+					"Mining: Cuckoo{} at {} gps (graphs per second)",
+					cuckoo_size,
+					sps_total);
 				if sps_total.is_finite() {
 					let mut mining_stats = mining_stats.write().unwrap();
 					mining_stats.combined_gps = sps_total;

p2p/src/peers.rs

@@ -280,10 +280,10 @@ impl Peers {
 		}
 		debug!(
 			LOGGER,
-			"broadcast_block: {}, {} at {}, to {} peers, done.",
-			b.hash(),
+			"broadcast_block: {} @ {} [{}] was sent to {} peers.",
 			b.header.total_difficulty,
 			b.header.height,
+			b.hash(),
 			count,
 		);
 	}
@@ -594,7 +594,7 @@ impl NetAdapter for Peers {
 	/// addresses.
 	fn find_peer_addrs(&self, capab: Capabilities) -> Vec<SocketAddr> {
 		let peers = self.find_peers(State::Healthy, capab, MAX_PEER_ADDRS as usize);
-		debug!(LOGGER, "Got {} peer addrs to send.", peers.len());
+		trace!(LOGGER, "find_peer_addrs: {} healthy peers picked", peers.len());
 		map_vec!(peers, |p| p.addr)
 	}