Judge loss by arrival order and a deadline, one tx ring per stream

direction.go

@@ -28,6 +28,8 @@ type direction struct {
 
 	// Guards everything the sampler touches. Collection consumes self-clearing
 	// sources, so a second concurrent reader would see a gap.
+	iface int
+
 	mu   sync.Mutex
 	prev sample
 	nic  *nicCounters
@@ -214,8 +216,14 @@ type view struct {
 
 // One tick of every counter this direction owns, flattened to deltas: the
 // worker counters grow forever, the socket drop statistic clears itself on
-// read, and the nic counters re-base, none of which survives past here.
+// read, and the nic counters re-base, none of which survives past here. The
+// loss judge runs first, so a silent wire's charges are on the books before
+// the read.
 func (d *direction) collect() (frames, bytes uint64, e errs) {
+	now := time.Now()
+	for i := range d.streams {
+		d.streams[i].judge(now)
+	}
 	cur := d.snapshot()
 	prev := d.prev
 	d.prev = cur
@@ -308,7 +316,7 @@ func (d *direction) primeCounters() {
 	d.mu.Unlock()
 }
 
-func buildDirection(label string, tx, rx endpoint, masked *atomic.Bool) (*direction, error) {
+func buildDirection(label string, iface int, tx, rx endpoint, masked *atomic.Bool) (*direction, error) {
 	// Built before the windows, since each window judges sequence numbers against
 	// the frontier its own sender publishes.
 	txs := make([]*txStats, numStreams)
@@ -316,6 +324,7 @@ func buildDirection(label string, tx, rx endpoint, masked *atomic.Bool) (*direct
 		txs[i] = &txStats{}
 	}
 	d := &direction{
+		iface:   iface,
 		txStats: txs,
 		streams: newLossWindows(txs),
 		masked:  masked,
@@ -360,6 +369,7 @@ func (d *direction) start(wg *sync.WaitGroup, done *atomic.Bool, rxReady *sync.W
 		w := &txWorker{
 			fd:      fd,
 			stream:  uint16(i),
+			cpu:     txCPU(d.iface, i),
 			spec:    d.specs[i],
 			batch:   batchSize,
 			stats:   d.txStats[i],
@@ -380,7 +390,6 @@ func (d *direction) start(wg *sync.WaitGroup, done *atomic.Bool, rxReady *sync.W
 			spec:   d.specs[i],
 			stats:  d.rxStats[i],
 			loss:   &d.streams[i],
-			masked: d.masked,
 			ready:  rxReady,
 		}
 		wg.Add(1)