extensions from laptop

.local/share/noctalia/plugins/system-status/cpu.luau

@@ -11,6 +11,26 @@ local command = [[awk '
 local previous = {}
 local request_in_flight = false
 
+local function colorForUsage(percent)
+  if percent >= 85 then
+    return "#ff453a" -- red
+  end
+  if percent >= 70 then
+    return "#ff8800" -- orange
+  end
+  if percent >= 50 then
+    return "#ffd60a" -- yellow
+  end
+  return "#ffffff" -- white
+end
+
+local function renderStatus(text, color)
+  barWidget.render(ui.row({ gap = 4, align = "center" }, {
+    ui.glyph({ name = "cpu", size = 14, color = color }),
+    ui.label({ text = text, color = color }),
+  }))
+end
+
 function update()
   noctalia.setUpdateInterval(2000)
 
@@ -23,7 +43,8 @@ function update()
     request_in_flight = false
 
     if result.exitCode ~= 0 then
-      barWidget.setText("CPU —")
+      renderStatus("CPU —", "#fff1e6")
+      barWidget.setTooltip("Unable to read CPU utilization")
       return
     end
 
@@ -47,12 +68,19 @@ function update()
       previous[name] = { total = total, idle = idle }
     end
 
-    barWidget.setGlyph("cpu")
     if sampled > 0 then
-      barWidget.setText(string.format("%.0f%%", utilization))
-      barWidget.setTooltip("Aggregate CPU utilization (100% per logical CPU)")
+      -- Keep the aggregate display, but base its heat color on average
+      -- utilization per logical CPU so multicore systems do not stay red.
+      local per_cpu_utilization = utilization / sampled
+      renderStatus(string.format("%.0f%%", utilization), colorForUsage(per_cpu_utilization))
+      barWidget.setTooltip(
+        string.format(
+          "Aggregate CPU utilization (100%% per logical CPU) · %.0f%% average per CPU",
+          per_cpu_utilization
+        )
+      )
     else
-      barWidget.setText("—")
+      renderStatus("—", "#fff1e6")
       barWidget.setTooltip("Sampling CPU utilization…")
     end
   end)