feat: add miner idle metric (#1023)

Author: omerfirmak

miner/scroll_worker.go

@@ -65,6 +65,7 @@ var (
 	collectL2Timer     = metrics.NewRegisteredTimer("miner/collect_l2_txns", nil)
 	l2CommitTimer      = metrics.NewRegisteredTimer("miner/commit", nil)
 	cccStallTimer      = metrics.NewRegisteredTimer("miner/ccc_stall", nil)
+	idleTimer          = metrics.NewRegisteredTimer("miner/idle", nil)
 
 	commitReasonCCCCounter      = metrics.NewRegisteredCounter("miner/commit_reason_ccc", nil)
 	commitReasonDeadlineCounter = metrics.NewRegisteredCounter("miner/commit_reason_deadline", nil)
@@ -354,8 +355,10 @@ func (w *worker) mainLoop() {
 			w.current = nil
 		}
 
+		idleStart := time.Now()
 		select {
 		case <-w.startCh:
+			idleTimer.UpdateSince(idleStart)
 			if w.isRunning() {
 				if err := w.checkHeadRowConsumption(); err != nil {
 					log.Error("failed to start head checkers", "err", err)
@@ -364,17 +367,21 @@ func (w *worker) mainLoop() {
 			}
 			_, err = w.tryCommitNewWork(time.Now(), w.chain.CurrentHeader().Hash(), nil)
 		case trigger := <-w.reorgCh:
+			idleTimer.UpdateSince(idleStart)
 			err = w.handleReorg(&trigger)
 		case chainHead := <-w.chainHeadCh:
+			idleTimer.UpdateSince(idleStart)
 			if w.isCanonical(chainHead.Block.Header()) {
 				_, err = w.tryCommitNewWork(time.Now(), chainHead.Block.Hash(), nil)
 			}
 		case <-w.current.deadlineCh():
+			idleTimer.UpdateSince(idleStart)
 			w.current.deadlineReached = true
 			if len(w.current.txs) > 0 {
 				_, err = w.commit(false)
 			}
 		case ev := <-w.txsCh:
+			idleTimer.UpdateSince(idleStart)
 			// Apply transactions to the pending state
 			//
 			// Note all transactions received may not be continuous with transactions

params/version.go

@@ -24,7 +24,7 @@ import (
 const (
 	VersionMajor = 5         // Major version component of the current release
 	VersionMinor = 7         // Minor version component of the current release
-	VersionPatch = 8         // Patch version component of the current release
+	VersionPatch = 9         // Patch version component of the current release
 	VersionMeta  = "mainnet" // Version metadata to append to the version string
 )