Enhance substrate ingest limits and optimize simulator stream reuse

simulator/src/emitters.rs

@@ -38,9 +38,17 @@ pub async fn run_t2_emitter(
 ) -> u64 {
     let period = Duration::from_nanos((1.0e9 / rate_hz) as u64);
     let mut ticker = tokio::time::interval(period);
-    ticker.set_missed_tick_behavior(MissedTickBehavior::Delay);
+    ticker.set_missed_tick_behavior(MissedTickBehavior::Skip);
     let mut sent: u64 = 0;
 
+    let mut send = match conn.open_uni().await {
+        Ok(s) => s,
+        Err(e) => {
+            tracing::warn!(error = %e, "T2 open_uni failed; emitter exiting");
+            return 0;
+        }
+    };
+
     loop {
         ticker.tick().await;
         if interrupted.load(Ordering::SeqCst) {
@@ -57,25 +65,19 @@ pub async fn run_t2_emitter(
         };
         slot.seq = slot.seq.wrapping_add(1);
 
-        match conn.open_uni().await {
-            Ok(mut send) => {
-                if let Err(e) = send.write_all(&msg.to_bytes()).await {
-                    tracing::warn!(error = %e, "T2 write_all failed");
-                    continue;
-                }
-                if let Err(e) = send.finish() {
-                    tracing::warn!(error = %e, "T2 finish failed");
-                    continue;
-                }
-                sent += 1;
-                counter.store(sent, Ordering::Relaxed);
-            }
-            Err(e) => {
-                tracing::warn!(error = %e, "T2 open_uni failed; emitter exiting");
-                break;
-            }
+        if let Err(e) = send.write_all(&msg.to_bytes()).await {
+            tracing::warn!(error = %e, "T2 write_all failed; stream closed?");
+            break;
         }
+        
+        sent += 1;
+        counter.store(sent, Ordering::Relaxed);
     }
+    
+    if let Err(e) = send.finish() {
+        tracing::warn!(error = %e, "T2 finish failed");
+    }
+    
     sent
 }
 
@@ -92,7 +94,7 @@ pub async fn run_t3_emitter(
 ) -> (u64, u64) {
     let period = Duration::from_nanos((1.0e9 / rate_hz) as u64);
     let mut ticker = tokio::time::interval(period);
-    ticker.set_missed_tick_behavior(MissedTickBehavior::Delay);
+    ticker.set_missed_tick_behavior(MissedTickBehavior::Skip);
     let mut sent: u64 = 0;
     let mut timeouts: u64 = 0;
 

simulator/src/main.rs

@@ -221,7 +221,7 @@ async fn main() -> anyhow::Result<()> {
     if cli.rate_hz > 0.0 {
         let period = Duration::from_nanos((1.0e9 / cli.rate_hz) as u64);
         let mut ticker = tokio::time::interval(period);
-        ticker.set_missed_tick_behavior(MissedTickBehavior::Delay);
+        ticker.set_missed_tick_behavior(MissedTickBehavior::Skip);
 
         let unlimited = cli.count == 0;
         let mut last_progress = started;

simulator/tests/end_to_end_t1.rs

@@ -28,6 +28,9 @@ fn loopback_config(cert: PathBuf, key: PathBuf) -> QuicConfig {
         server_interface: "127.0.0.1".to_string(),
         server_cert: cert.to_string_lossy().into_owned(),
         server_key: key.to_string_lossy().into_owned(),
+        t1_capacity: 1024,
+        t2_capacity: 512,
+        t3_capacity: 256,
     }
 }
 

simulator/tests/end_to_end_t2.rs

@@ -27,6 +27,9 @@ fn loopback_config(cert: PathBuf, key: PathBuf) -> QuicConfig {
         server_interface: "127.0.0.1".to_string(),
         server_cert: cert.to_string_lossy().into_owned(),
         server_key: key.to_string_lossy().into_owned(),
+        t1_capacity: 1024,
+        t2_capacity: 512,
+        t3_capacity: 256,
     }
 }
 

simulator/tests/end_to_end_t3.rs

@@ -28,6 +28,9 @@ fn loopback_config(cert: PathBuf, key: PathBuf) -> QuicConfig {
         server_interface: "127.0.0.1".to_string(),
         server_cert: cert.to_string_lossy().into_owned(),
         server_key: key.to_string_lossy().into_owned(),
+        t1_capacity: 1024,
+        t2_capacity: 512,
+        t3_capacity: 256,
     }
 }