Add CPU util

freon@UshakovVasilii_Github.yahoo.com/cpuUsageUtil.js

@@ -0,0 +1,134 @@
+import GLib from 'gi://GLib';
+
+export default class CpuUsageUtil {
+
+    constructor(intervalSeconds = 2) {
+        this._updated = false;
+        this._readings = [];
+        this._prevSnapshot = null;
+        this._intervalUsec = 0;
+        this._lastUpdateUsec = 0;
+        this.interval = intervalSeconds;
+
+        // Take initial snapshot so the first real execute() can compute a delta
+        this._prevSnapshot = this._readProcStat();
+    }
+
+    get available() {
+        return this._prevSnapshot !== null;
+    }
+
+    get updated() {
+        return this._updated;
+    }
+
+    set updated(updated) {
+        this._updated = updated;
+    }
+
+    execute(callback) {
+        const nowUsec = GLib.get_monotonic_time();
+        const remaining = this._intervalUsec - (nowUsec - this._lastUpdateUsec);
+        if (this._intervalUsec > 0 && this._lastUpdateUsec !== 0 && remaining > 0) {
+            if (callback)
+                callback();
+            return;
+        }
+
+        this._updated = false;
+
+        try {
+            const snapshot = this._readProcStat();
+            if (!snapshot || !this._prevSnapshot) {
+                this._prevSnapshot = snapshot;
+                return;
+            }
+
+            this._readings = [];
+
+            for (const [cpu, fields] of snapshot) {
+                const prev = this._prevSnapshot.get(cpu);
+                if (!prev)
+                    continue;
+
+                const idle = (fields.idle + fields.iowait) - (prev.idle + prev.iowait);
+                const total = fields.total - prev.total;
+
+                if (total <= 0)
+                    continue;
+
+                const usage = 100.0 * (1.0 - idle / total);
+
+                this._readings.push({
+                    label: cpu === 'cpu' ? 'CPU Total' : cpu.toUpperCase().replace('CPU', 'CPU '),
+                    usage: Math.max(0, Math.min(100, usage)),
+                });
+            }
+
+            this._prevSnapshot = snapshot;
+        } catch (e) {
+            logError(e, '[FREON] Failed to read CPU usage');
+            this._readings = [];
+        } finally {
+            this._lastUpdateUsec = nowUsec;
+            this._updated = true;
+            if (callback)
+                callback();
+        }
+    }
+
+    get usage() {
+        return this._readings;
+    }
+
+    destroy() {
+        this._readings = [];
+        this._prevSnapshot = null;
+        this._lastUpdateUsec = 0;
+    }
+
+    set interval(seconds) {
+        const clamped = Math.max(1, seconds | 0);
+        this._intervalUsec = clamped * 1000000;
+        this._lastUpdateUsec = 0;
+    }
+
+    _readProcStat() {
+        let ok, contents;
+        try {
+            [ok, contents] = GLib.file_get_contents('/proc/stat');
+        } catch (e) {
+            return null;
+        }
+
+        if (!ok)
+            return null;
+
+        const text = new TextDecoder().decode(contents);
+        const result = new Map();
+
+        for (const line of text.split('\n')) {
+            if (!line.startsWith('cpu'))
+                continue;
+
+            const parts = line.trim().split(/\s+/);
+            const name = parts[0];
+
+            // user nice system idle iowait irq softirq steal
+            const user    = parseInt(parts[1]) || 0;
+            const nice    = parseInt(parts[2]) || 0;
+            const system  = parseInt(parts[3]) || 0;
+            const idle    = parseInt(parts[4]) || 0;
+            const iowait  = parseInt(parts[5]) || 0;
+            const irq     = parseInt(parts[6]) || 0;
+            const softirq = parseInt(parts[7]) || 0;
+            const steal   = parseInt(parts[8]) || 0;
+
+            const total = user + nice + system + idle + iowait + irq + softirq + steal;
+
+            result.set(name, { idle, iowait, total });
+        }
+
+        return result.size > 0 ? result : null;
+    }
+}

freon@UshakovVasilii_Github.yahoo.com/extension.js

@@ -25,6 +25,7 @@ import SmartctlUtil from './smartctlUtil.js';
 import NvmecliUtil from './nvmecliUtil.js';
 import BatteryUtil from './batteryUtil.js';
 import WattdUtil from './wattdUtil.js';
+import CpuUsageUtil from './cpuUsageUtil.js';
 
 import FreonItem from './freonItem.js';
 
@@ -80,6 +81,7 @@ class FreonMenuButton extends PanelMenu.Button {
         this._initLiquidctlUtility();
         this._initBatteryUtility();
         this._initWattdUtility();
+        this._initCpuUsageUtility();
 
         this._initNvidiaUtility();
         this._initBumblebeeNvidiaUtility();
@@ -104,6 +106,7 @@ class FreonMenuButton extends PanelMenu.Button {
             'fan' : Gio.icon_new_for_string(path + '/icons/freon-fan-symbolic.svg'),
             'power' : voltageIcon,
             'battery' : batteryIcon,
+            'cpu-usage' : Gio.icon_new_for_string('utilities-system-monitor-symbolic'),
         }
 
         this._menuLayout = new St.BoxLayout();
@@ -145,6 +148,8 @@ class FreonMenuButton extends PanelMenu.Button {
         this._addSettingChangedSignal('use-generic-lmsensors', this._sensorsUtilityChanged.bind(this));
         this._addSettingChangedSignal('freeimpi-selected', this._freeipmiUtilityChanged.bind(this));
         this._addSettingChangedSignal('use-generic-liquidctl', this._liquidctlUtilityChanged.bind(this));
+        this._addSettingChangedSignal('use-cpu-usage', this._cpuUsageUtilityChanged.bind(this));
+        this._addSettingChangedSignal('cpu-usage-update-time', this._cpuUsageUpdateTimeChanged.bind(this));
         this._addSettingChangedSignal('use-generic-wattd', this._wattdUtilityChanged.bind(this));
         this._addSettingChangedSignal('show-battery-stats', this._batteryUtilityChanged.bind(this));
 
@@ -161,7 +166,8 @@ class FreonMenuButton extends PanelMenu.Button {
         this._addSettingChangedSignal('show-rotationrate', this._rerender.bind(this));
         this._addSettingChangedSignal('show-voltage', this._rerender.bind(this));
         this._addSettingChangedSignal('show-power', this._rerender.bind(this));
-        
+        this._addSettingChangedSignal('show-cpu-usage', this._rerender.bind(this));
+
 
         this._addSettingChangedSignal('group-temperature', this._rerender.bind(this))
         this._addSettingChangedSignal('group-rotationrate', this._rerender.bind(this))
@@ -392,6 +398,31 @@ class FreonMenuButton extends PanelMenu.Button {
         this._querySensors();
     }
 
+    _initCpuUsageUtility() {
+        if (this._settings.get_boolean('use-cpu-usage'))
+            this._utils.cpuUsage = new CpuUsageUtil(this._settings.get_int('cpu-usage-update-time'));
+    }
+
+    _destroyCpuUsageUtility() {
+        if (this._utils.cpuUsage) {
+            this._utils.cpuUsage.destroy();
+            delete this._utils.cpuUsage;
+        }
+    }
+
+    _cpuUsageUtilityChanged() {
+        this._destroyCpuUsageUtility();
+        this._initCpuUsageUtility();
+        this._querySensors();
+        this._updateUI(true);
+    }
+
+    _cpuUsageUpdateTimeChanged() {
+        if (this._utils.cpuUsage)
+            this._utils.cpuUsage.interval = this._settings.get_int('cpu-usage-update-time');
+        this._querySensors();
+    }
+
     _initNvidiaUtility() {
         if (this._settings.get_boolean('use-gpu-nvidia'))
             this._utils.nvidia = new NvidiaUtil();
@@ -560,6 +591,7 @@ class FreonMenuButton extends PanelMenu.Button {
 
         this._destroyBatteryUtility();
         this._destroyWattdUtility();
+        this._destroyCpuUsageUtility();
 
         GLib.Source.remove(this._timeoutId);
         GLib.Source.remove(this._updateUITimeoutId);
@@ -628,6 +660,7 @@ class FreonMenuButton extends PanelMenu.Button {
         let fanInfo = [];
         let voltageInfo = [];
         let powerInfo = [];
+        let cpuUsageInfo = [];
 
         if (this._utils.sensors && this._utils.sensors.available) {
             if (this._settings.get_boolean('show-temperature')) {
@@ -674,6 +707,10 @@ class FreonMenuButton extends PanelMenu.Button {
             if (this._settings.get_boolean('show-power'))
                 powerInfo = powerInfo.concat(this._utils.wattd.power);
 
+        if (this._utils.cpuUsage && this._utils.cpuUsage.available)
+            if (this._settings.get_boolean('show-cpu-usage'))
+                cpuUsageInfo = cpuUsageInfo.concat(this._utils.cpuUsage.usage);
+
         if (this._utils.nvidia && this._utils.nvidia.available)
             if (this._settings.get_boolean('show-temperature'))
                 gpuTempInfo = gpuTempInfo.concat(this._utils.nvidia.temp);
@@ -708,12 +745,14 @@ class FreonMenuButton extends PanelMenu.Button {
         fanInfo.sort(comparator);
         voltageInfo.sort(comparator);
         powerInfo.sort(comparator);
+        cpuUsageInfo.sort(comparator);
 
         let tempInfo = gpuTempInfo.concat(sensorsTempInfo).concat(driveTempInfo);
 
         if (tempInfo.length == 0
             && fanInfo.length == 0
-            && voltageInfo.length == 0) {
+            && voltageInfo.length == 0
+            && cpuUsageInfo.length == 0) {
             this._sensorMenuItems = {};
             this.menu.removeAll();
 
@@ -848,6 +887,18 @@ class FreonMenuButton extends PanelMenu.Button {
                 });
             }
 
+            if (cpuUsageInfo.length > 0 && (fanInfo.length > 0 || voltageInfo.length > 0 || powerInfo.length > 0))
+                sensors.push({type : 'separator'});
+
+            for (let cpu of cpuUsageInfo){
+                sensors.push({
+                    icon: 'cpu-usage',
+                    type: 'cpu-usage',
+                    label: cpu.label,
+                    value: _("%.1f%%").format(cpu.usage)
+                });
+            }
+
             this._fixNames(sensors);
 
             for (let k in this._hotLabels)

freon@UshakovVasilii_Github.yahoo.com/prefs.js

@@ -110,6 +110,26 @@ export default class FreonPreferences extends ExtensionPreferences {
             width_request: 320,
         });
 
+        const cpuUsageSwitch = this._addSwitch("CPU Usage", "use-cpu-usage", "Read CPU usage from /proc/stat");
+        group.add(cpuUsageSwitch);
+
+        const cpuUsageInterval = new Adw.SpinRow({
+            title: _('CPU Usage Polling Interval'),
+            subtitle: _('Seconds between CPU usage updates'),
+            adjustment: new Gtk.Adjustment({
+                lower: 1,
+                upper: 60,
+                value: this._settings.get_int('cpu-usage-update-time'),
+                step_increment: 1,
+            }),
+        });
+        this._settings.bind('cpu-usage-update-time', cpuUsageInterval, 'value', Gio.SettingsBindFlags.DEFAULT);
+        cpuUsageInterval.sensitive = this._settings.get_boolean('use-cpu-usage');
+        this._settings.connect('changed::use-cpu-usage', () => {
+            cpuUsageInterval.sensitive = this._settings.get_boolean('use-cpu-usage');
+        });
+        group.add(cpuUsageInterval);
+
         group.add(this._addSwitch("lm-sensors", "use-generic-lmsensors", "Read sensors from lm-sensors"));
         group.add(this._addSwitch("liquidctl", "use-generic-liquidctl", "Read sensors from liquidctl (v1.7.0+)"));
         const wattdSwitch = this._addSwitch("wattd", "use-generic-wattd", "Read power data from wattd");
@@ -180,6 +200,7 @@ export default class FreonPreferences extends ExtensionPreferences {
         group.add(this._addSwitch("Voltage", "show-voltage"));
         group.add(this._addSwitch("Power", "show-power"));
         group.add(this._addSwitch("Battery", "show-battery-stats"));
+        group.add(this._addSwitch("CPU Usage", "show-cpu-usage"));
         return group
     }
 

freon@UshakovVasilii_Github.yahoo.com/schemas/org.gnome.shell.extensions.sensors.gschema.xml

@@ -105,6 +105,24 @@
       <description>Read sensors from (requires liquidctl v1.7.0 or later)</description>
     </key>
 
+    <key type="b" name="use-cpu-usage">
+      <default>true</default>
+      <summary>Enable CPU usage sensor</summary>
+      <description>Read CPU usage from /proc/stat</description>
+    </key>
+
+    <key type="b" name="show-cpu-usage">
+      <default>true</default>
+      <summary>Show CPU usage</summary>
+      <description>Display CPU usage percentage</description>
+    </key>
+
+    <key type="i" name="cpu-usage-update-time">
+      <default>2</default>
+      <summary>Seconds between CPU usage updates</summary>
+      <description>Polling interval for CPU usage sensor</description>
+    </key>
+
     <key type="b" name="use-generic-wattd">
       <default>false</default>
       <summary>Read power data from wattd</summary>