include events and lock acquisition to stats

src/lib.rs

@@ -12,6 +12,7 @@ mod stream;
 
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, RwLock};
+use std::time::Instant;
 
 use mlua::{prelude::*, LuaSerdeExt};
 use mlua::{Function, Value};
@@ -109,13 +110,17 @@ pub fn stop(_: &Lua, _: ()) -> LuaResult<()> {
 
 #[no_mangle]
 pub fn next(lua: &Lua, (env, callback): (i32, Function)) -> LuaResult<bool> {
+    let start = Instant::now();
+
     if let Some(Server {
         ref ipc_mission,
         ref ipc_hook,
         ref stats,
         ..
     }) = *SERVER.read().unwrap()
     {
+        let _guard = stats.track_block_time(start);
+
         let next = match env {
             1 => ipc_mission.try_next(),
             2 => ipc_hook.try_next(),
@@ -172,6 +177,8 @@ pub fn next(lua: &Lua, (env, callback): (i32, Function)) -> LuaResult<bool> {
 
 #[no_mangle]
 pub fn event(lua: &Lua, event: Value) -> LuaResult<()> {
+    let start = Instant::now();
+
     let event: Event = match lua.from_value(event) {
         Ok(event) => event,
         Err(err) => {
@@ -186,9 +193,13 @@ pub fn event(lua: &Lua, event: Value) -> LuaResult<()> {
     if let Some(Server {
         ref ipc_mission,
         ref runtime,
+        ref stats,
         ..
     }) = *SERVER.read().unwrap()
     {
+        let _guard = stats.track_block_time(start);
+        stats.track_event();
+
         log::debug!("Received event: {:#?}", event);
         runtime.block_on(ipc_mission.event(event));
     }

src/rpc.rs

@@ -62,7 +62,7 @@ impl MissionRpc {
         I: serde::Serialize + Send + Sync + 'static,
         for<'de> O: serde::Deserialize<'de> + Send + Sync + std::fmt::Debug + 'static,
     {
-        let _guard = self.stats.track_queue();
+        let _guard = self.stats.track_queue_size();
         self.ipc
             .request(method, Some(request.into_inner()))
             .await
@@ -73,7 +73,7 @@ impl MissionRpc {
     where
         I: serde::Serialize + Send + Sync + 'static,
     {
-        let _guard = self.stats.track_queue();
+        let _guard = self.stats.track_queue_size();
         self.ipc
             .notification(method, Some(request.into_inner()))
             .await
@@ -100,7 +100,7 @@ impl HookRpc {
         I: serde::Serialize + Send + Sync + 'static,
         for<'de> O: serde::Deserialize<'de> + Send + Sync + std::fmt::Debug + 'static,
     {
-        let _guard = self.stats.track_queue();
+        let _guard = self.stats.track_queue_size();
         self.ipc
             .request(method, Some(request.into_inner()))
             .await
@@ -111,7 +111,7 @@ impl HookRpc {
     where
         I: serde::Serialize + Send + Sync + 'static,
     {
-        let _guard = self.stats.track_queue();
+        let _guard = self.stats.track_queue_size();
         self.ipc
             .notification(method, Some(request.into_inner()))
             .await

src/stats.rs

@@ -15,6 +15,8 @@ struct Inner {
     shutdown_signal: ShutdownHandle,
     /// Total numer of calls into the MSE.
     calls_count: AtomicU32,
+    /// Total numer of events received from the MSE.
+    events_count: AtomicU32,
     /// Total numer of calls in the queue.
     queue_size: AtomicU32,
     /// Time spent waiting for MSE calls to complete (since last report).
@@ -27,21 +29,22 @@ struct Inner {
 struct IntervalStats {
     /// Highest TPS count of calls into the MSE.
     tps_highest: f64,
+    /// Highest events per second.
+    eps_highest: f64,
     /// Sum of the queue sizes at each tick (neccessary to calculate the average).
     queue_size_total: u32,
     /// Highest queue size at a tick of the interval.
     queue_size_highest: u32,
 }
 
-/// This guard is used to track call completion and time spend until completed (completed is
-/// equivalent to this guard being dropped).
-pub struct TrackCallGuard {
+/// This guard is used to keep track of the time the gRPC server blocked DCS.
+pub struct TrackBlockTimeGuard {
     start: Instant,
     stats: Arc<Inner>,
 }
 
 /// This guard is used to keep track of calls in the queue.
-pub struct TrackQueueGuard {
+pub struct TrackQueueSizeGuard {
     stats: Arc<Inner>,
 }
 
@@ -50,23 +53,32 @@ impl Stats {
         Stats(Arc::new(Inner {
             shutdown_signal,
             calls_count: AtomicU32::new(0),
+            events_count: AtomicU32::new(0),
             queue_size: AtomicU32::new(0),
             nanoseconds_waited: AtomicUsize::new(0),
             interval_stats: Arc::new(Mutex::new(IntervalStats::default())),
         }))
     }
 
-    pub fn track_call(&self) -> TrackCallGuard {
+    pub fn track_call(&self) {
         self.0.calls_count.fetch_add(1, Ordering::Relaxed);
-        TrackCallGuard {
-            start: Instant::now(),
+    }
+
+    pub fn track_event(&self) {
+        self.0.events_count.fetch_add(1, Ordering::Relaxed);
+    }
+
+    pub fn track_block_time(&self, start: Instant) -> TrackBlockTimeGuard {
+        self.0.calls_count.fetch_add(1, Ordering::Relaxed);
+        TrackBlockTimeGuard {
+            start,
             stats: self.0.clone(),
         }
     }
 
-    pub fn track_queue(&self) -> TrackQueueGuard {
+    pub fn track_queue_size(&self) -> TrackQueueSizeGuard {
         self.0.queue_size.fetch_add(1, Ordering::Relaxed);
-        TrackQueueGuard {
+        TrackQueueSizeGuard {
             stats: self.0.clone(),
         }
     }
@@ -81,6 +93,7 @@ impl Stats {
 
         loop {
             let calls_count_before = self.0.calls_count.load(Ordering::Relaxed);
+            let events_count_before = self.0.events_count.load(Ordering::Relaxed);
             let start = Instant::now();
 
             // wait for either the shutdown signal or the next interval tick, whatever happens first
@@ -93,6 +106,7 @@ impl Stats {
 
             let mut interval_stats = self.0.interval_stats.lock().await;
             let calls_count = self.0.calls_count.load(Ordering::Relaxed);
+            let events_count = self.0.events_count.load(Ordering::Relaxed);
 
             // update report for elapsed second
             let elapsed = start.elapsed().as_secs_f64();
@@ -103,6 +117,12 @@ impl Stats {
                     interval_stats.tps_highest = tps;
                 }
 
+                // update highest events per second
+                let eps = f64::from(events_count - events_count_before) / elapsed;
+                if eps > interval_stats.eps_highest {
+                    interval_stats.eps_highest = eps;
+                }
+
                 // update queue size
                 let queue_size = self.0.queue_size.load(Ordering::Relaxed);
                 interval_stats.queue_size_total += queue_size;
@@ -118,6 +138,10 @@ impl Stats {
                 let tps_average =
                     f64::try_from(calls_count).unwrap_or(f64::MAX) / elapsed.as_secs_f64();
 
+                // average events per second
+                let eps_average =
+                    f64::try_from(events_count).unwrap_or(f64::MAX) / elapsed.as_secs_f64();
+
                 // total block time
                 let block_time_total = Duration::from_nanos(
                     u64::try_from(self.0.nanoseconds_waited.swap(0, Ordering::Relaxed))
@@ -137,6 +161,11 @@ impl Stats {
                     tps_average,
                     interval_stats.tps_highest
                 );
+                log::info!(
+                    "Events per second: average={:.2}, highest={:.2}",
+                    eps_average,
+                    interval_stats.eps_highest
+                );
                 log::info!(
                     "Blocking time: total={:?} (≙ {:.3}%)",
                     block_time_total,
@@ -158,7 +187,7 @@ impl Stats {
     }
 }
 
-impl Drop for TrackCallGuard {
+impl Drop for TrackBlockTimeGuard {
     fn drop(&mut self) {
         self.stats.nanoseconds_waited.fetch_add(
             usize::try_from(self.start.elapsed().as_nanos()).unwrap_or(usize::MAX),
@@ -167,7 +196,7 @@ impl Drop for TrackCallGuard {
     }
 }
 
-impl Drop for TrackQueueGuard {
+impl Drop for TrackQueueSizeGuard {
     fn drop(&mut self) {
         self.stats.queue_size.fetch_sub(1, Ordering::Relaxed);
     }