enable N-pollers in the kernel

config.go

@@ -62,6 +62,9 @@ type Config struct {
 	// Standard Error I/O channel
 	StdErr chan<- error
 
+	// Size of poller pool in the system
+	PollerPool int
+
 	// Frequency to poll broker api
 	PollFrequency time.Duration
 
@@ -87,6 +90,7 @@ func NewConfig() Config {
 		CapRcv:                0,
 		CapAck:                0,
 		Backoff:               backoff.Exp(10*time.Millisecond, 10, 0.5),
+		PollerPool:            1,
 		PollFrequency:         10 * time.Millisecond,
 		TimeToFlight:          5 * time.Second,
 		NetworkTimeout:        5 * time.Second,
@@ -163,6 +167,13 @@ func WithLogStdErr() Option {
 	}
 }
 
+// Number of poller in the system
+func WithPollerPool(n int) Option {
+	return func(conf *Config) {
+		conf.PollerPool = n
+	}
+}
+
 // Frequency to poll broker api
 func WithPollFrequency(t time.Duration) Option {
 	return func(conf *Config) {

kernel/cathode.go

@@ -54,6 +54,11 @@ type Dequeuer struct {
 func NewDequeuer(cathode Cathode, config swarm.Config) *Dequeuer {
 	ctx, can := context.WithCancel(context.Background())
 
+	// Must not be 0
+	if config.PollerPool == 0 {
+		config.PollerPool = 1
+	}
+
 	return &Dequeuer{
 		Config:  config,
 		context: ctx,
@@ -114,29 +119,31 @@ func (k *Dequeuer) receive() {
 		}
 	}
 
-	k.WaitGroup.Add(1)
-	go func() {
-		slog.Debug("kernel receive loop started")
-
-	exit:
-		for {
-			select {
-			case <-k.context.Done():
-				break exit
-			default:
-			}
+	for pid := 0; pid < k.Config.PollerPool; pid++ {
+		k.WaitGroup.Add(1)
+		go func() {
+			slog.Debug("kernel poller started", "pid", pid)
+
+		exit:
+			for {
+				select {
+				case <-k.context.Done():
+					break exit
+				default:
+				}
 
-			select {
-			case <-k.context.Done():
-				break exit
-			case <-time.After(k.Config.PollFrequency):
-				asker()
+				select {
+				case <-k.context.Done():
+					break exit
+				case <-time.After(k.Config.PollFrequency):
+					asker()
+				}
 			}
-		}
 
-		k.WaitGroup.Done()
-		slog.Debug("kernel receive loop stopped")
-	}()
+			k.WaitGroup.Done()
+			slog.Debug("kernel poller stopped", "pid", pid)
+		}()
+	}
 }
 
 // Dequeue creates pair of channels within kernel to enqueue messages

version.go

@@ -8,4 +8,4 @@
 
 package swarm
 
-const Version = "v0.20.1"
+const Version = "v0.20.2"