bencher: also bench aquatic_udp with io_uring

TODO.md

@@ -2,11 +2,6 @@
 
 ## High priority
 
-* aquatic_bencher
-  * bench aquatic_udp with io_uring too
-  * test with SubsequentOnePerPair
-  * include chihaya with higher core counts?
-
 ## Medium priority
 
 * stagger cleaning tasks?

crates/bencher/Cargo.toml

@@ -19,7 +19,7 @@ default = ["udp"]
 udp = ["aquatic_udp", "aquatic_udp_load_test"]
 
 [dependencies]
-aquatic_udp = { optional = true, workspace = true }
+aquatic_udp = { optional = true, workspace = true, features = ["io-uring"] }
 aquatic_udp_load_test = { optional = true, workspace = true }
 
 anyhow = "1"

crates/bencher/README.md

@@ -1,6 +1,8 @@
 # aquatic_bencher
 
-Automated benchmarking of aquatic and other BitTorrent trackers. Linux only.
+Automated benchmarking of aquatic and other BitTorrent trackers.
+
+Requires Linux 6.0 or later.
 
 ## Supported trackers by protocol
 

crates/bencher/src/common.rs

@@ -167,21 +167,21 @@ impl TryFrom<Range<usize>> for TaskSetCpuIndicator {
 
 #[derive(Debug, Clone, Copy, clap::ValueEnum)]
 pub enum CpuMode {
-    /// For 8 vCPU processor, use vCPU groups 0, 1, 2, 3, 4, 5, 6 and 7
-    /// 
     /// Suitable for bare-metal machines without hyperthreads/SMT.
+    ///
+    /// For 8 vCPU processor, uses vCPU groups 0, 1, 2, 3, 4, 5, 6 and 7
     Subsequent,
-    /// For 8 vCPU processor, use vCPU groups 0 & 4, 1 & 5, 2 & 6 and 3 & 7
-    /// 
     /// Suitable for bare-metal machines with hyperthreads/SMT.
-    SplitPairs,
-    /// For 8 vCPU processor, use vCPU groups 0 & 1, 2 & 3, 4 & 5 and 6 & 7
-    SubsequentPairs,
-    /// For 8 vCPU processor, use vCPU groups 0, 2, 4 and 6
     ///
+    /// For 8 vCPU processor, uses vCPU groups 0 & 4, 1 & 5, 2 & 6 and 3 & 7
+    SplitPairs,
+    /// For 8 vCPU processor, uses vCPU groups 0 & 1, 2 & 3, 4 & 5 and 6 & 7
+    SubsequentPairs,
     /// Suitable for somewhat fairly comparing trackers on Hetzner virtual
     /// machines. Since in-VM hyperthreads aren't really hyperthreads,
     /// enabling them causes unpredictable performance.
+    ///
+    /// For 8 vCPU processor, uses vCPU groups 0, 2, 4 and 6
     SubsequentOnePerPair,
 }
 

crates/bencher/src/protocols/udp.rs

@@ -20,6 +20,7 @@ use crate::{
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub enum UdpTracker {
     Aquatic,
+    AquaticIoUring,
     OpenTracker,
     Chihaya,
 }
@@ -28,6 +29,7 @@ impl Tracker for UdpTracker {
     fn name(&self) -> String {
         match self {
             Self::Aquatic => "aquatic_udp".into(),
+            Self::AquaticIoUring => "aquatic_udp (io_uring)".into(),
             Self::OpenTracker => "opentracker".into(),
             Self::Chihaya => "chihaya".into(),
         }
@@ -65,14 +67,19 @@ impl UdpCommand {
                     ],
                 },
                 load_test_runs: simple_load_test_runs(cpu_mode, &[
+                    (8, Priority::Medium),
                     (12, Priority::High)
                 ]),
             },
             2 => SetConfig {
                 implementations: indexmap! {
                     UdpTracker::Aquatic => vec![
-                        AquaticUdpRunner::new(1, 1, Priority::Medium),
+                        AquaticUdpRunner::with_mio(1, 1, Priority::Medium),
-                        AquaticUdpRunner::new(2, 1, Priority::High),
+                        AquaticUdpRunner::with_mio(2, 1, Priority::High),
+                    ],
+                    UdpTracker::AquaticIoUring => vec![
+                        AquaticUdpRunner::with_io_uring(1, 1, Priority::Medium),
+                        AquaticUdpRunner::with_io_uring(2, 1, Priority::High),
                     ],
                     UdpTracker::OpenTracker => vec![
                         OpenTrackerUdpRunner::new(2, Priority::High),
@@ -83,14 +90,19 @@ impl UdpCommand {
                     ],
                 },
                 load_test_runs: simple_load_test_runs(cpu_mode, &[
+                    (8, Priority::Medium),
                     (12, Priority::High),
                 ]),
             },
             4 => SetConfig {
                 implementations: indexmap! {
                     UdpTracker::Aquatic => vec![
-                        AquaticUdpRunner::new(3, 1, Priority::High),
+                        AquaticUdpRunner::with_mio(3, 1, Priority::High),
-                        AquaticUdpRunner::new(4, 1, Priority::Medium),
+                        AquaticUdpRunner::with_mio(4, 1, Priority::Medium),
+                    ],
+                    UdpTracker::AquaticIoUring => vec![
+                        AquaticUdpRunner::with_io_uring(3, 1, Priority::High),
+                        AquaticUdpRunner::with_io_uring(4, 1, Priority::Medium),
                     ],
                     UdpTracker::OpenTracker => vec![
                         OpenTrackerUdpRunner::new(4, Priority::High),
@@ -100,13 +112,17 @@ impl UdpCommand {
                     ],
                 },
                 load_test_runs: simple_load_test_runs(cpu_mode, &[
+                    (8, Priority::Medium),
                     (12, Priority::High),
                 ]),
             },
             6 => SetConfig {
                 implementations: indexmap! {
                     UdpTracker::Aquatic => vec![
-                        AquaticUdpRunner::new(5, 1, Priority::High),
+                        AquaticUdpRunner::with_mio(5, 1, Priority::High),
+                    ],
+                    UdpTracker::AquaticIoUring => vec![
+                        AquaticUdpRunner::with_io_uring(5, 1, Priority::High),
                     ],
                     UdpTracker::OpenTracker => vec![
                         OpenTrackerUdpRunner::new(6, Priority::High),
@@ -116,13 +132,17 @@ impl UdpCommand {
                     ],
                 },
                 load_test_runs: simple_load_test_runs(cpu_mode, &[
+                    (8, Priority::Medium),
                     (12, Priority::High),
                 ]),
             },
             8 => SetConfig {
                 implementations: indexmap! {
                     UdpTracker::Aquatic => vec![
-                        AquaticUdpRunner::new(7, 1, Priority::High),
+                        AquaticUdpRunner::with_mio(7, 1, Priority::High),
+                    ],
+                    UdpTracker::AquaticIoUring => vec![
+                        AquaticUdpRunner::with_io_uring(7, 1, Priority::High),
                     ],
                     UdpTracker::OpenTracker => vec![
                         OpenTrackerUdpRunner::new(8, Priority::High),
@@ -132,14 +152,19 @@ impl UdpCommand {
                     ],
                 },
                 load_test_runs: simple_load_test_runs(cpu_mode, &[
+                    (8, Priority::Medium),
                     (12, Priority::High),
                 ]),
             },
             12 => SetConfig {
                 implementations: indexmap! {
                     UdpTracker::Aquatic => vec![
-                        AquaticUdpRunner::new(10, 2, Priority::High),
+                        AquaticUdpRunner::with_mio(10, 2, Priority::High),
-                        AquaticUdpRunner::new(9, 3, Priority::Medium),
+                        AquaticUdpRunner::with_mio(9, 3, Priority::Medium),
+                    ],
+                    UdpTracker::AquaticIoUring => vec![
+                        AquaticUdpRunner::with_io_uring(10, 2, Priority::High),
+                        AquaticUdpRunner::with_io_uring(9, 3, Priority::Medium),
                     ],
                     UdpTracker::OpenTracker => vec![
                         OpenTrackerUdpRunner::new(12, Priority::High),
@@ -149,13 +174,17 @@ impl UdpCommand {
                     ],
                 },
                 load_test_runs: simple_load_test_runs(cpu_mode, &[
+                    (8, Priority::Medium),
                     (12, Priority::High),
                 ]),
             },
             16 => SetConfig {
                 implementations: indexmap! {
                     UdpTracker::Aquatic => vec![
-                        AquaticUdpRunner::new(13, 3, Priority::High),
+                        AquaticUdpRunner::with_mio(13, 3, Priority::High),
+                    ],
+                    UdpTracker::AquaticIoUring => vec![
+                        AquaticUdpRunner::with_io_uring(13, 3, Priority::High),
                     ],
                     UdpTracker::OpenTracker => vec![
                         OpenTrackerUdpRunner::new(16, Priority::High),
@@ -183,12 +212,12 @@ impl UdpCommand {
 struct AquaticUdpRunner {
     socket_workers: usize,
     swarm_workers: usize,
+    use_io_uring: bool,
     priority: Priority,
 }
 
 impl AquaticUdpRunner {
-    #[allow(clippy::new_ret_no_self)]
+    fn with_mio(
-    fn new(
         socket_workers: usize,
         swarm_workers: usize,
         priority: Priority,
@@ -196,6 +225,19 @@ impl AquaticUdpRunner {
         Rc::new(Self {
             socket_workers,
             swarm_workers,
+            use_io_uring: false,
+            priority,
+        })
+    }
+    fn with_io_uring(
+        socket_workers: usize,
+        swarm_workers: usize,
+        priority: Priority,
+    ) -> Rc<dyn ProcessRunner<Command = UdpCommand>> {
+        Rc::new(Self {
+            socket_workers,
+            swarm_workers,
+            use_io_uring: true,
             priority,
         })
     }
@@ -216,6 +258,7 @@ impl ProcessRunner for AquaticUdpRunner {
         c.socket_workers = self.socket_workers;
         c.swarm_workers = self.swarm_workers;
         c.network.address = SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::LOCALHOST, 3000));
+        c.network.use_io_uring = self.use_io_uring;
         c.protocol.max_response_peers = 30;
 
         let c = toml::to_string_pretty(&c)?;

crates/udp/src/config.rs

@@ -100,6 +100,8 @@ pub struct NetworkConfig {
     pub socket_recv_buffer_size: usize,
     /// Poll timeout in milliseconds (mio backend only)
     pub poll_timeout_ms: u64,
+    #[cfg(feature = "io-uring")]
+    pub use_io_uring: bool,
     /// Number of ring entries (io_uring backend only)
     ///
     /// Will be rounded to next power of two if not already one.
@@ -131,6 +133,8 @@ impl Default for NetworkConfig {
             socket_recv_buffer_size: 8_000_000,
             poll_timeout_ms: 50,
             #[cfg(feature = "io-uring")]
+            use_io_uring: true,
+            #[cfg(feature = "io-uring")]
             ring_size: 128,
             resend_buffer_max_len: 0,
         }

crates/udp/src/workers/socket/mod.rs

@@ -49,8 +49,9 @@ pub fn run_socket_worker(
     priv_dropper: PrivilegeDropper,
 ) -> anyhow::Result<()> {
     #[cfg(all(target_os = "linux", feature = "io-uring"))]
-    match self::uring::supported_on_current_kernel() {
+    if config.network.use_io_uring {
-        Ok(()) => {
+        self::uring::supported_on_current_kernel().context("check for io_uring compatibility")?;
+
         return self::uring::SocketWorker::run(
             config,
             shared_state,
@@ -61,13 +62,6 @@ pub fn run_socket_worker(
             priv_dropper,
         );
     }
-        Err(err) => {
-            ::log::warn!(
-                "Falling back to mio because of lacking kernel io_uring support: {:#}",
-                err
-            );
-        }
-    }
 
     self::mio::SocketWorker::run(
         config,

scripts/bench/setup-udp-bookworm.sh

@@ -5,13 +5,14 @@
 sudo apt-get update && sudo apt-get upgrade -y
 sudo apt-get install -y curl vim htop screen cmake build-essential pkg-config git screen cvs zlib1g zlib1g-dev golang
 sudo echo "deb http://deb.debian.org/debian bookworm-backports main contrib" >> /etc/apt/sources.list
-sudo apt-get update && sudo apt-get install linux-image-amd64/bookworm-backports
+sudo apt-get update && sudo apt-get install -y linux-image-amd64/bookworm-backports
 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 source "$HOME/.cargo/env"
 
 # Build aquatic
 . ./scripts/env-native-cpu-without-avx-512
-cargo build --profile "release-debug" -p aquatic_udp
+# export RUSTFLAGS="-C target-cpu=native"
+cargo build --profile "release-debug" -p aquatic_udp --features "io-uring"
 cargo build --profile "release-debug" -p aquatic_udp_load_test
 cargo build --profile "release-debug" -p aquatic_bencher --features udp
 git log --oneline | head -n 1