Add the beginnings of internal stats keeping for lqosd and a not-advertised /api/stats page to view.

src/rust/lqos_bus/src/bus/request.rs

@@ -130,6 +130,9 @@ pub enum BusRequest {
     target: String,
   },
 
+  /// Obtain the lqosd statistics
+  GetLqosStats,
+
   /// If running on Equinix (the `equinix_test` feature is enabled),
   /// display a "run bandwidht test" link.
   #[cfg(feature = "equinix_tests")]

src/rust/lqos_bus/src/bus/response.rs

@@ -74,4 +74,12 @@ pub enum BusResponse {
 
   /// Named nodes from network.json
   NodeNames(Vec<(usize, String)>),
+
+  /// Statistics from lqosd
+  LqosdStats{
+    /// Number of bus requests handled
+    bus_requests: u64,
+    /// Us to poll hosts
+    time_to_poll_hosts: u64,
+  }
 }

src/rust/lqos_node_manager/src/config_control.rs

@@ -1,8 +1,8 @@
 use crate::{auth_guard::AuthGuard, cache_control::NoCache};
 use default_net::get_interfaces;
-use lqos_bus::{bus_request, BusRequest};
+use lqos_bus::{bus_request, BusRequest, BusResponse};
 use lqos_config::{EtcLqos, LibreQoSConfig, Tunables};
-use rocket::{fs::NamedFile, serde::json::Json};
+use rocket::{fs::NamedFile, serde::{json::Json, Serialize}};
 
 // Note that NoCache can be replaced with a cache option
 // once the design work is complete.
@@ -76,3 +76,23 @@ pub async fn update_lqos_tuning(
 
   Json("OK".to_string())
 }
+
+#[derive(Serialize, Clone, Default)]
+#[serde(crate = "rocket::serde")]
+pub struct LqosStats {
+  pub bus_requests_since_start: u64,
+  pub time_to_poll_hosts_us: u64,
+}
+
+#[get("/api/stats")]
+pub async fn stats() -> NoCache<Json<LqosStats>> {
+  for msg in bus_request(vec![BusRequest::GetLqosStats]).await.unwrap() {
+    if let BusResponse::LqosdStats { bus_requests, time_to_poll_hosts } = msg {
+      return NoCache::new(Json(LqosStats {
+        bus_requests_since_start: bus_requests,
+        time_to_poll_hosts_us: time_to_poll_hosts
+      }));
+    }
+  }
+  NoCache::new(Json(LqosStats::default()))
+}

src/rust/lqos_node_manager/src/main.rs

@@ -82,6 +82,7 @@ fn rocket() -> _ {
         network_tree::network_tree_summary,
         network_tree::node_names,
         network_tree::funnel_for_queue,
+        config_control::stats,
         // Supporting files
         static_pages::bootsrap_css,
         static_pages::plotly_js,

src/rust/lqos_queue_tracker/src/bus.rs

@@ -3,9 +3,8 @@ use lqos_bus::BusResponse;
 
 pub fn get_raw_circuit_data(circuit_id: &str) -> BusResponse {
   still_watching(circuit_id);
-  let reader = CIRCUIT_TO_QUEUE.read().unwrap();
-  if let Some(circuit) = reader.get(circuit_id) {
-    if let Ok(json) = serde_json::to_string(circuit) {
+  if let Some(circuit) = CIRCUIT_TO_QUEUE.get(circuit_id) {
+    if let Ok(json) = serde_json::to_string(circuit.value()) {
       BusResponse::RawQueueData(json)
     } else {
       BusResponse::RawQueueData(String::new())

src/rust/lqos_queue_tracker/src/circuit_to_queue.rs

@@ -1,8 +1,6 @@
+use dashmap::DashMap;
 use once_cell::sync::Lazy;
-
 use crate::queue_store::QueueStore;
-use std::collections::HashMap;
-use std::sync::RwLock;
 
-pub(crate) static CIRCUIT_TO_QUEUE: Lazy<RwLock<HashMap<String, QueueStore>>> =
-  Lazy::new(|| RwLock::new(HashMap::new()));
+pub(crate) static CIRCUIT_TO_QUEUE: Lazy<DashMap<String, QueueStore>> =
+  Lazy::new(DashMap::new);

src/rust/lqos_queue_tracker/src/tracking/mod.rs

@@ -48,13 +48,12 @@ fn track_queues() {
 
     if let Ok(download) = download {
       if let Ok(upload) = upload {
-        let mut mapping = CIRCUIT_TO_QUEUE.write().unwrap();
-        if let Some(circuit) = mapping.get_mut(circuit_id) {
+        if let Some(mut circuit) = CIRCUIT_TO_QUEUE.get_mut(circuit_id) {
           circuit.update(&download[0], &upload[0]);
         } else {
           // It's new: insert it
           if !download.is_empty() && !upload.is_empty() {
-            mapping.insert(
+            CIRCUIT_TO_QUEUE.insert(
               circuit_id.to_string(),
               QueueStore::new(download[0].clone(), upload[0].clone()),
             );

src/rust/lqosd/src/main.rs

@@ -24,7 +24,9 @@ use signal_hook::{
   consts::{SIGHUP, SIGINT, SIGTERM},
   iterator::Signals,
 };
+use stats::{BUS_REQUESTS, TIME_TO_POLL_HOSTS};
 use tokio::join;
+mod stats;
 
 // Use JemAllocator only on supported platforms
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
@@ -120,6 +122,7 @@ fn handle_bus_requests(
 ) {
   for req in requests.iter() {
     //println!("Request: {:?}", req);
+    BUS_REQUESTS.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
     responses.push(match req {
       BusRequest::Ping => lqos_bus::BusResponse::Ack,
       BusRequest::GetCurrentThroughput => {
@@ -173,6 +176,12 @@ fn handle_bus_requests(
       BusRequest::GetFunnel { target: parent } => {
         shaped_devices_tracker::get_funnel(parent)
       }
+      BusRequest::GetLqosStats => {
+        BusResponse::LqosdStats { 
+          bus_requests: BUS_REQUESTS.load(std::sync::atomic::Ordering::Relaxed),
+          time_to_poll_hosts: TIME_TO_POLL_HOSTS.load(std::sync::atomic::Ordering::Relaxed),
+        }
+      }
     });
   }
 }

src/rust/lqosd/src/stats.rs

@@ -0,0 +1,4 @@
+use std::sync::atomic::AtomicU64;
+
+pub static BUS_REQUESTS: AtomicU64 = AtomicU64::new(0);
+pub static TIME_TO_POLL_HOSTS: AtomicU64 = AtomicU64::new(0);

src/rust/lqosd/src/throughput_tracker/mod.rs

@@ -2,7 +2,7 @@ mod throughput_entry;
 mod tracking_data;
 use crate::{
   shaped_devices_tracker::NETWORK_JSON,
-  throughput_tracker::tracking_data::ThroughputTracker,
+  throughput_tracker::tracking_data::ThroughputTracker, stats::TIME_TO_POLL_HOSTS,
 };
 use log::{info, warn};
 use lqos_bus::{BusResponse, IpStats, TcHandle, XdpPpingResult};
@@ -23,6 +23,7 @@ pub fn spawn_throughput_monitor() {
 
   std::thread::spawn(move || {
     periodic(interval_ms, "Throughput Monitor", &mut || {
+      let start = std::time::Instant::now();
       {
         let net_json = NETWORK_JSON.read().unwrap();
         net_json.zero_throughput_and_rtt();
@@ -32,6 +33,8 @@ pub fn spawn_throughput_monitor() {
       THROUGHPUT_TRACKER.apply_rtt_data();
       THROUGHPUT_TRACKER.update_totals();
       THROUGHPUT_TRACKER.next_cycle();
+      let duration_ms = start.elapsed().as_micros();
+      TIME_TO_POLL_HOSTS.store(duration_ms as u64, std::sync::atomic::Ordering::Relaxed);
     });
   });
 }