mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Aaro Altonen
80616f6d03
[litep2p](https://github.com/altonen/litep2p) is a libp2p-compatible P2P networking library. It supports all of the features of `rust-libp2p` that are currently being utilized by Polkadot SDK. Compared to `rust-libp2p`, `litep2p` has a quite different architecture which is why the new `litep2p` network backend is only able to use a little of the existing code in `sc-network`. The design has been mainly influenced by how we'd wish to structure our networking-related code in Polkadot SDK: independent higher-levels protocols directly communicating with the network over links that support bidirectional backpressure. A good example would be `NotificationHandle`/`RequestResponseHandle` abstractions which allow, e.g., `SyncingEngine` to directly communicate with peers to announce/request blocks. I've tried running `polkadot --network-backend litep2p` with a few different peer configurations and there is a noticeable reduction in networking CPU usage. For high load (`--out-peers 200`), networking CPU usage goes down from ~110% to ~30% (80 pp) and for normal load (`--out-peers 40`), the usage goes down from ~55% to ~18% (37 pp). These should not be taken as final numbers because: a) there are still some low-hanging optimization fruits, such as enabling [receive window auto-tuning](https://github.com/libp2p/rust-yamux/pull/176), integrating `Peerset` more closely with `litep2p` or improving memory usage of the WebSocket transport b) fixing bugs/instabilities that incorrectly cause `litep2p` to do less work will increase the networking CPU usage c) verification in a more diverse set of tests/conditions is needed Nevertheless, these numbers should give an early estimate for CPU usage of the new networking backend. This PR consists of three separate changes: * introduce a generic `PeerId` (wrapper around `Multihash`) so that we don't have use `NetworkService::PeerId` in every part of the code that uses a `PeerId` * introduce `NetworkBackend` trait, implement it for the libp2p network stack and make Polkadot SDK generic over `NetworkBackend` * implement `NetworkBackend` for litep2p The new library should be considered experimental which is why `rust-libp2p` will remain as the default option for the time being. This PR currently depends on the master branch of `litep2p` but I'll cut a new release for the library once all review comments have been addresses. --------- Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Co-authored-by: Dmitry Markin <dmitry@markin.tech> Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com> Co-authored-by: Alexandru Vasile <alexandru.vasile@parity.io>
37 lines
1006 B
TOML
37 lines
1006 B
TOML
[package]
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description = "Substrate network common"
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name = "sc-network-common"
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version = "0.33.0"
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license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
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authors.workspace = true
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edition.workspace = true
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homepage = "https://substrate.io"
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repository.workspace = true
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documentation = "https://docs.rs/sc-network-sync"
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[lints]
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workspace = true
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[package.metadata.docs.rs]
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targets = ["x86_64-unknown-linux-gnu"]
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[build-dependencies]
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prost-build = "0.11"
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[dependencies]
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async-trait = "0.1.79"
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bitflags = "1.3.2"
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codec = { package = "parity-scale-codec", version = "3.6.1", features = [
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"derive",
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] }
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futures = "0.3.30"
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libp2p-identity = { version = "0.1.3", features = ["peerid"] }
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sc-consensus = { path = "../../consensus/common" }
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sc-network-types = { path = "../types" }
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sp-consensus = { path = "../../../primitives/consensus/common" }
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sp-consensus-grandpa = { path = "../../../primitives/consensus/grandpa" }
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sp-runtime = { path = "../../../primitives/runtime" }
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[dev-dependencies]
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tempfile = "3.1.0"
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