ActivityMonitor: add CPU speed graph

The info is now available in cpu_info, we should do something with it.

Change-Id: Iac7bd697783d63b5c84c7da33770b3c9a7d417b4
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4832
Reviewed-by: Kacper Kasper <kacperkasper@gmail.com>
Reviewed-by: Axel Dörfler <axeld@pinc-software.de>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

src/apps/activitymonitor/ActivityWindow.cpp

@@ -373,6 +373,9 @@ ActivityWindow::_AddDefaultView()
 			view->AddDataSource(new NetworkUsageDataSource(true));
 			view->AddDataSource(new NetworkUsageDataSource(false));
 			break;
+		case 3:
+			view->AddDataSource(new CPUFrequencyDataSource());
+			break;
 		case 1:
 		default:
 			// Everything beyond that defaults to a CPU usage view

src/apps/activitymonitor/DataSource.cpp

@@ -25,6 +25,7 @@ const DataSource* kSources[] = {
 	new CachedMemoryDataSource(),
 	new SwapSpaceDataSource(),
 	new PageFaultsDataSource(),
+	new CPUFrequencyDataSource(),
 	new CPUUsageDataSource(),
 	new CPUCombinedUsageDataSource(),
 	new NetworkUsageDataSource(true),
@@ -810,6 +811,149 @@ RunningAppsDataSource::AdaptiveScale() const
 //	#pragma mark -
 
 
+CPUFrequencyDataSource::CPUFrequencyDataSource(int32 cpu)
+{
+	fMinimum = 0;
+	fMaximum = 1000000000ll;
+		// Maximum initially set at 1GHz, will be automatically raised if the actual frequency gets
+		// higher than that
+
+	_SetCPU(cpu);
+}
+
+
+CPUFrequencyDataSource::CPUFrequencyDataSource(const CPUFrequencyDataSource& other)
+	: DataSource(other)
+{
+	fCPU = other.fCPU;
+	fLabel = other.fLabel;
+	fShortLabel = other.fShortLabel;
+}
+
+
+CPUFrequencyDataSource::~CPUFrequencyDataSource()
+{
+}
+
+
+DataSource*
+CPUFrequencyDataSource::Copy() const
+{
+	return new CPUFrequencyDataSource(*this);
+}
+
+
+DataSource*
+CPUFrequencyDataSource::CopyForCPU(int32 cpu) const
+{
+	CPUFrequencyDataSource* copy = new CPUFrequencyDataSource(*this);
+	copy->_SetCPU(cpu);
+
+	return copy;
+}
+
+
+void
+CPUFrequencyDataSource::Print(BString& text, int64 value) const
+{
+	text.SetToFormat("%" PRId64 " MHz", value / 1000000);
+}
+
+
+int64
+CPUFrequencyDataSource::NextValue(SystemInfo& info)
+{
+	int64 value = info.CPUCurrentFrequency(fCPU);
+
+	if (value > fMaximum)
+		SetLimits(0, value);
+
+	return value;
+}
+
+
+const char*
+CPUFrequencyDataSource::Label() const
+{
+	return fLabel.String();
+}
+
+
+const char*
+CPUFrequencyDataSource::ShortLabel() const
+{
+	return fShortLabel.String();
+}
+
+
+const char*
+CPUFrequencyDataSource::InternalName() const
+{
+	return "CPU speed";
+}
+
+
+const char*
+CPUFrequencyDataSource::Name() const
+{
+	return B_TRANSLATE("CPU speed");
+}
+
+
+int32
+CPUFrequencyDataSource::CPU() const
+{
+	return fCPU;
+}
+
+
+bool
+CPUFrequencyDataSource::PerCPU() const
+{
+	return true;
+}
+
+
+bool
+CPUFrequencyDataSource::Primary() const
+{
+	return true;
+}
+
+
+void
+CPUFrequencyDataSource::_SetCPU(int32 cpu)
+{
+	fCPU = cpu;
+
+	if (SystemInfo().CPUCount() > 1) {
+		fLabel.SetToFormat(B_TRANSLATE("CPU %d speed"), cpu + 1);
+		fShortLabel.SetToFormat(B_TRANSLATE("CPU %d"), cpu + 1);
+	} else {
+		fLabel = B_TRANSLATE("CPU usage");
+		fShortLabel = B_TRANSLATE("CPU");
+	}
+
+	const rgb_color kColors[] = {
+		// TODO: find some better defaults...
+		{200, 0, 200},
+		{0, 200, 200},
+		{80, 80, 80},
+		{230, 150, 50},
+		{255, 0, 0},
+		{0, 255, 0},
+		{0, 0, 255},
+		{0, 150, 230}
+	};
+	const uint32 kNumColors = B_COUNT_OF(kColors);
+
+	fColor = kColors[cpu % kNumColors];
+}
+
+
+//	#pragma mark -
+
+
 CPUUsageDataSource::CPUUsageDataSource(int32 cpu)
 	:
 	fPreviousActive(0),
@@ -958,7 +1102,7 @@ CPUUsageDataSource::_SetCPU(int32 cpu)
 		{0, 0, 255},
 		{0, 150, 230}
 	};
-	const uint32 kNumColors = sizeof(kColors) / sizeof(kColors[0]);
+	const uint32 kNumColors = B_COUNT_OF(kColors);
 
 	fColor = kColors[cpu % kNumColors];
 }

src/apps/activitymonitor/DataSource.h

@@ -263,6 +263,36 @@ private:
 };
 
 
+class CPUFrequencyDataSource : public DataSource {
+public:
+						CPUFrequencyDataSource(int32 cpu = 0);
+						CPUFrequencyDataSource(const CPUFrequencyDataSource& other);
+	virtual				~CPUFrequencyDataSource();
+
+	virtual DataSource*	Copy() const;
+	virtual DataSource*	CopyForCPU(int32 cpu) const;
+
+	virtual void		Print(BString& text, int64 value) const;
+	virtual	int64		NextValue(SystemInfo& info);
+
+	virtual const char*	InternalName() const;
+	virtual const char*	Name() const;
+	virtual const char*	Label() const;
+	virtual const char*	ShortLabel() const;
+
+	virtual int32		CPU() const;
+	virtual bool		PerCPU() const;
+	virtual bool		Primary() const;
+
+private:
+			void		_SetCPU(int32 cpu);
+
+	int32				fCPU;
+	BString				fLabel;
+	BString				fShortLabel;
+};
+
+
 class PageFaultsDataSource : public DataSource {
 public:
 						PageFaultsDataSource();

src/apps/activitymonitor/SystemInfo.h

@@ -45,6 +45,8 @@ public:
 			uint32		CPUCount() const { return fSystemInfo.cpu_count; }
 			bigtime_t	CPUActiveTime(uint32 cpu) const
 							{ return fCPUInfos[cpu].active_time; }
+			uint64		CPUCurrentFrequency(uint32 cpu) const
+							{ return fCPUInfos[cpu].current_frequency; }
 			const system_info& Info() const { return fSystemInfo; }
 
 			uint64		NetworkReceived();