Implement some data smoothing

Modules/ProcessList/PerformanceTab.qml

@@ -71,7 +71,7 @@ Column {
           anchors.verticalCenter: parent.verticalCenter
 
           StyledText {
-            text: DankgopService.cpuUsage.toFixed(1) + "%"
+            text: DankgopService.smoothedCpuUsage.toFixed(1) + "%"
             font.pixelSize: Theme.fontSizeSmall
             font.weight: Font.Bold
             color: Theme.primary

Modules/ProcessList/ProcessListItem.qml

@@ -62,10 +62,10 @@ Rectangle {
       name: DankgopService.getProcessIcon(process ? process.command : "")
       size: Theme.iconSize - 4
       color: {
-        if (process && process.cpu > 80)
+        if (process && process.smoothedCpu > 80)
           return Theme.error
 
-        if (process && process.cpu > 50)
+        if (process && process.smoothedCpu > 50)
           return Theme.warning
 
         return Theme.surfaceText
@@ -95,10 +95,10 @@ Rectangle {
       height: 20
       radius: Theme.cornerRadius
       color: {
-        if (process && process.cpu > 80)
+        if (process && process.smoothedCpu > 80)
           return Qt.rgba(Theme.error.r, Theme.error.g, Theme.error.b, 0.12)
 
-        if (process && process.cpu > 50)
+        if (process && process.smoothedCpu > 50)
           return Qt.rgba(Theme.warning.r, Theme.warning.g,
                          Theme.warning.b, 0.12)
 
@@ -110,15 +110,15 @@ Rectangle {
       anchors.verticalCenter: parent.verticalCenter
 
       StyledText {
-        text: DankgopService.formatCpuUsage(process ? process.cpu : 0)
+        text: DankgopService.formatCpuUsage(process ? process.smoothedCpu : 0)
         font.pixelSize: Theme.fontSizeSmall
         font.family: SettingsData.monoFontFamily
         font.weight: Font.Bold
         color: {
-          if (process && process.cpu > 80)
+          if (process && process.smoothedCpu > 80)
             return Theme.error
 
-          if (process && process.cpu > 50)
+          if (process && process.smoothedCpu > 50)
             return Theme.warning
 
           return Theme.surfaceText

Modules/ProcessList/SystemOverview.qml

@@ -57,9 +57,9 @@ Row {
 
                 StyledText {
                     text: {
-                        if (DankgopService.cpuUsage === undefined || DankgopService.cpuUsage === null)
+                        if (DankgopService.smoothedCpuUsage === undefined || DankgopService.smoothedCpuUsage === null)
                             return "--%"
-                        return DankgopService.cpuUsage.toFixed(1) + "%"
+                        return DankgopService.smoothedCpuUsage.toFixed(1) + "%"
                     }
                     font.pixelSize: Theme.fontSizeLarge
                     font.family: SettingsData.monoFontFamily

Modules/TopBar/CpuMonitor.qml

@@ -59,10 +59,10 @@ Rectangle {
       name: "memory"
       size: Theme.iconSize - 8
       color: {
-        if (DankgopService.cpuUsage > 80)
+        if (DankgopService.smoothedCpuUsage > 80)
           return Theme.tempDanger
 
-        if (DankgopService.cpuUsage > 60)
+        if (DankgopService.smoothedCpuUsage > 60)
           return Theme.tempWarning
 
         return Theme.surfaceText
@@ -72,12 +72,12 @@ Rectangle {
 
     StyledText {
       text: {
-        if (DankgopService.cpuUsage === undefined
-            || DankgopService.cpuUsage === null
-            || DankgopService.cpuUsage === 0) {
+        if (DankgopService.smoothedCpuUsage === undefined
+            || DankgopService.smoothedCpuUsage === null
+            || DankgopService.smoothedCpuUsage === 0) {
           return "--%"
         }
-        return DankgopService.cpuUsage.toFixed(0) + "%"
+        return DankgopService.smoothedCpuUsage.toFixed(0) + "%"
       }
       font.pixelSize: Theme.fontSizeSmall
       font.weight: Font.Medium

Services/DankgopService.qml

@@ -72,6 +72,8 @@ Singleton {
     property var memoryHistory: []
     property var networkHistory: ({ "rx": [], "tx": [] })
     property var diskHistory: ({ "read": [], "write": [] })
+    property var processCpuHistory: ({})
+    property real smoothedCpuUsage: 0
 
     function addRef(modules = null) {
         refCount++
@@ -124,6 +126,13 @@ Singleton {
                         enabledModules.splice(index, 1)
                         modulesChanged = true
                         console.log("Disabling module:", module, "(no more refs)")
+
+                        // Clear sample data when module is disabled
+                        if (module === "cpu") {
+                            cpuSampleData = null
+                        } else if (module === "processes") {
+                            procSampleData = null
+                        }
                     }
                 }
             }
@@ -274,6 +283,7 @@ Singleton {
             cpuModel = cpu.model || ""
             perCoreCpuUsage = cpu.coreUsage || []
             addToHistory(cpuHistory, cpuUsage)
+            updateSmoothedCpuUsage()
 
             // Update CPU sample data for the next run
             if (cpu.total && cpu.cores) {
@@ -360,11 +370,34 @@ Singleton {
         if (data.processes && Array.isArray(data.processes)) {
             const newProcesses = []
             const newProcSample = []
+            const currentPids = {}
+
             for (const proc of data.processes) {
+                const pid = proc.pid || 0
+                if (pid === 0) continue
+
+                currentPids[pid] = true
+                const cpu = proc.cpu || 0
+
+                let history = processCpuHistory[pid]
+                if (!history) {
+                    history = []
+                }
+
+                history.push(cpu)
+                if (history.length > 3) {
+                    history.shift()
+                }
+                processCpuHistory[pid] = history
+
+                const sum = history.reduce((a, b) => a + b, 0)
+                const smoothedCpu = sum / history.length
+
                 newProcesses.push({
-                    "pid": proc.pid || 0,
+                    "pid": pid,
                     "ppid": proc.ppid || 0,
-                    "cpu": proc.cpu || 0,
+                    "cpu": cpu,
+                    "smoothedCpu": smoothedCpu,
                     "memoryPercent": proc.memoryPercent || proc.pssPercent || 0,
                     "memoryKB": proc.memoryKB || proc.pssKB || 0,
                     "command": proc.command || "",
@@ -385,6 +418,14 @@ Singleton {
             if (newProcSample.length > 0) {
                 procSampleData = newProcSample
             }
+
+            // Garbage collect old PIDs from history
+            for (const pid in processCpuHistory) {
+                if (!currentPids[pid]) {
+                    delete processCpuHistory[pid]
+                }
+            }
+            processCpuHistory = Object.assign({}, processCpuHistory)
         }
 
         // Handle both gpu and gpu-temp module data
@@ -444,6 +485,16 @@ Singleton {
         isUpdating = false
     }
 
+    function updateSmoothedCpuUsage() {
+        if (cpuHistory.length === 0) {
+            smoothedCpuUsage = 0
+            return
+        }
+        const valuesToAverage = cpuHistory.slice(-3) // Average last 3 values
+        const sum = valuesToAverage.reduce((a, b) => a + b, 0)
+        smoothedCpuUsage = sum / valuesToAverage.length
+    }
+
     function addToHistory(array, value) {
         array.push(value)
         if (array.length > historySize) {