feat(osx): Apple silicon P-core/E-core support and monitoring

CMakeLists.txt

@@ -67,7 +67,7 @@ if(BTOP_LTO)
 endif()
 
 if(APPLE)
-  target_sources(libbtop PRIVATE src/osx/btop_collect.cpp src/osx/sensors.cpp src/osx/smc.cpp)
+  target_sources(libbtop PRIVATE src/osx/btop_collect.cpp src/osx/sensors.cpp src/osx/smc.cpp src/osx/ioreport.cpp)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR CMAKE_SYSTEM_NAME STREQUAL "MidnightBSD")
   target_sources(libbtop PRIVATE src/freebsd/btop_collect.cpp)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")

src/btop_draw.cpp

@@ -531,6 +531,8 @@ namespace Cpu {
 	vector<Draw::Graph> graphs_upper;
 	vector<Draw::Graph> graphs_lower;
 	Draw::Meter cpu_meter;
+#ifdef __APPLE__
+#endif
 	vector<Draw::Meter> gpu_meters;
 	vector<Draw::Graph> core_graphs;
 	vector<Draw::Graph> temp_graphs;
@@ -698,7 +700,6 @@ namespace Cpu {
 			}
 
 			cpu_meter = Draw::Meter{cpu_meter_width, "cpu"};
-
 			if (mid_line) {
 				out += Mv::to(y + graph_up_height + 1, x) + Fx::ub + Theme::c("cpu_box") + Symbols::div_left + Theme::c("div_line")
 					+ Symbols::h_line * (width - b_width - 2) + Symbols::div_right
@@ -834,6 +835,12 @@ namespace Cpu {
 					+ Symbols::h_line * ((freq_range ? 17 : 7) - cpuHz.size())
 					+ Symbols::title_left + Fx::b + Theme::c("title") + cpuHz + Fx::ub + Theme::c("div_line") + Symbols::title_right;
 
+	#ifdef __APPLE__
+		//? Skip default CPU bar if we have P/E cores - we'll draw P-CPU and E-CPU bars in the core section
+		const bool skip_cpu_bar = (Cpu::cpu_core_info.p_cores > 0 and Cpu::cpu_core_info.e_cores > 0);
+		if (not skip_cpu_bar)
+	#endif
+		{
 		out += Mv::to(b_y + 1, b_x + 1) + Theme::c("main_fg") + Fx::b + "CPU " + cpu_meter(safeVal(cpu.cpu_percent, "total"s).back())
 			+ Theme::g("cpu").at(clamp(safeVal(cpu.cpu_percent, "total"s).back(), 0ll, 100ll)) + rjust(to_string(safeVal(cpu.cpu_percent, "total"s).back()), 4) + Theme::c("main_fg") + '%';
 		if (show_temps) {
@@ -850,10 +857,11 @@ namespace Cpu {
 			string cwatts_post = "W";
 
 			max_observed_pwr = max(max_observed_pwr, cpu.usage_watts);
-			out += Theme::g("cached").at(clamp(cpu.usage_watts / max_observed_pwr * 100.0f, 0.0f, 100.0f)) + cwatts + Theme::c("main_fg") + cwatts_post; 
+			out += Theme::g("cached").at(clamp(cpu.usage_watts / max_observed_pwr * 100.0f, 0.0f, 100.0f)) + cwatts + Theme::c("main_fg") + cwatts_post;
 		}
 
 			out += Theme::c("div_line") + Symbols::v_line;
+		}
 		} catch (const std::exception& e) {
 			throw std::runtime_error("graphs, clock, meter : " + string{e.what()});
 		}
@@ -870,12 +878,41 @@ namespace Cpu {
 		};
 
 		//? Core text and graphs
+	#ifdef __APPLE__
+		//? On Apple Silicon, start at row 0 since we skip the default CPU bar
+		const bool pe_layout = (Cpu::cpu_core_info.p_cores > 0 and Cpu::cpu_core_info.e_cores > 0);
+		int cx = 0, cy = (pe_layout ? 0 : 1), cc = 0, core_width = (b_column_size == 0 ? 2 : 3);
+	#else
 		int cx = 0, cy = 1, cc = 0, core_width = (b_column_size == 0 ? 2 : 3);
+	#endif
 		if (Shared::coreCount >= 100) core_width++;
-		for (const auto& n : iota(0, Shared::coreCount)) {
+
+		//? Helper lambda to draw a single core line
+	#ifdef __APPLE__
+		const int p_cores_count = Cpu::cpu_core_info.p_cores;
+		const int e_cores_count = Cpu::cpu_core_info.e_cores;
+		const bool use_pe_labels = (p_cores_count > 0 and e_cores_count > 0);
+	#endif
+
+		auto draw_core = [&](int n) {
 			auto enabled = is_cpu_enabled(n);
+		#ifdef __APPLE__
+			string core_label;
+			if (use_pe_labels) {
+				// On Apple Silicon: E-cores are indices 0 to e_cores-1, P-cores are e_cores to end
+				if (n < e_cores_count) {
+					core_label = "E" + to_string(n);
+				} else {
+					core_label = "P" + to_string(n - e_cores_count);
+				}
+			} else {
+				core_label = (Shared::coreCount < 100 ? "C" : "") + to_string(n);
+			}
+			out += Mv::to(b_y + cy + 1, b_x + cx + 1) + Theme::c(enabled ? "main_fg" : "inactive_fg") + Fx::b + ljust(core_label, core_width + 1) + Fx::ub;
+		#else
 			out += Mv::to(b_y + cy + 1, b_x + cx + 1) + Theme::c(enabled ? "main_fg" : "inactive_fg") + (Shared::coreCount < 100 ? Fx::b + 'C' + Fx::ub : "")
 				+ ljust(to_string(n), core_width);
+		#endif
 			if ((b_column_size > 0 or extra_width > 0) and cmp_less(n, core_graphs.size()))
 				out += Theme::c("inactive_fg") + graph_bg * (5 * b_column_size + extra_width) + Mv::l(5 * b_column_size + extra_width)
 					+ core_graphs.at(n)(safeVal(cpu.core_percent, n), data_same or redraw);
@@ -893,10 +930,107 @@ namespace Cpu {
 			}
 
 			out += Theme::c("div_line") + Symbols::v_line;
+		};
 
-			if ((++cy > ceil((double)Shared::coreCount / b_columns) or cy == max_row) and n != Shared::coreCount - 1) {
-				if (++cc >= b_columns) break;
-				cy = 1; cx = (b_width / b_columns) * cc;
+	#ifdef __APPLE__
+		//? ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+		//? Apple Silicon P/E Core Layout
+		//?
+		//? Apple Silicon chips have Performance (P) and Efficiency (E) cores.
+		//? We display them in separate sections with their own frequency bars:
+		//?   ┌─────────────────────────┐
+		//?   │ P-CPU ■■■■■■■■■ 3.2 GHz │  <- P-core average + frequency
+		//?   │ P0 ▃▅▇ 45% │ P1 ▂▄▆ 32% │  <- Individual P-cores
+		//?   │ E-CPU ■■■■■■■■■ 2.1 GHz │  <- E-core average + frequency
+		//?   │ E0 ▁▃▅ 12% │ E1 ▂▄▆ 18% │  <- Individual E-cores
+		//?   └─────────────────────────┘
+		//?
+		//? Core indices: E-cores are 0 to e_cores-1, P-cores are e_cores to end.
+		//? Frequency is obtained via IOReport framework (sudoless).
+		//? ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+		const int p_cores_total = Cpu::cpu_core_info.p_cores;
+		const int e_cores_total = Cpu::cpu_core_info.e_cores;
+		const bool has_pe_cores = (p_cores_total > 0 and e_cores_total > 0);
+
+		if (has_pe_cores) {
+			const int col_width = b_width / b_columns;
+
+			//? On Apple Silicon: E-cores are indices 0 to e_cores-1, P-cores are e_cores to end
+			//? Calculate P-core and E-core average percentages
+			long long p_sum = 0, e_sum = 0;
+			for (int i = 0; i < e_cores_total and i < (int)cpu.core_percent.size(); ++i) {
+				e_sum += safeVal(cpu.core_percent, i).back();
+			}
+			for (int i = e_cores_total; i < e_cores_total + p_cores_total and i < (int)cpu.core_percent.size(); ++i) {
+				p_sum += safeVal(cpu.core_percent, i).back();
+			}
+			const long long p_avg = p_cores_total > 0 ? p_sum / p_cores_total : 0;
+			const long long e_avg = e_cores_total > 0 ? e_sum / e_cores_total : 0;
+
+			//? P-CPU bar (spans full width of all columns)
+			string p_label = "P-CPU";
+			const int p_freq = Cpu::cpu_core_info.p_freq_mhz;
+			const string p_freq_str = p_freq > 0 ? " " + format_freq(p_freq) : "";
+			//? Total row width = b_width - 1 (content area, box border is separate)
+			//? Content = "P-CPU " (6) + meter + freq_str + border (1) = b_width - 1
+			const int p_freq_width = static_cast<int>(p_freq_str.size());
+			const int p_meter = max(1, b_width - 7 - p_freq_width - 1);
+			out += Mv::to(b_y + cy + 1, b_x + 1) + Theme::c("main_fg") + Fx::b + p_label + Fx::ub + " "
+				+ Draw::Meter{p_meter, "cpu"}(p_avg)
+				+ Theme::g("cpu").at(clamp(p_avg, 0ll, 100ll)) + p_freq_str
+				+ Theme::c("div_line") + Symbols::v_line;
+			cy++;
+
+			//? Draw P-cores (indices e_cores_total to e_cores_total+p_cores_total-1)
+			int p_drawn = 0;
+			const int p_rows = (p_cores_total + b_columns - 1) / b_columns;
+			for (int row = 0; row < p_rows and p_drawn < p_cores_total and cy < max_row; ++row) {
+				for (int col = 0; col < b_columns and p_drawn < p_cores_total; ++col) {
+					cx = col * col_width;
+					draw_core(e_cores_total + p_drawn);
+					p_drawn++;
+				}
+				cy++;
+			}
+
+			//? E-CPU section header bar (spans full width of all columns)
+			if (cy < max_row) {
+				cx = 0;
+				string e_label = "E-CPU";
+				const int e_freq = Cpu::cpu_core_info.e_freq_mhz;
+				const string e_freq_str = e_freq > 0 ? " " + format_freq(e_freq) : "";
+				const int e_freq_width = static_cast<int>(e_freq_str.size());
+				const int e_meter = max(1, b_width - 7 - e_freq_width - 1);
+				out += Mv::to(b_y + cy + 1, b_x + 1) + Theme::c("main_fg") + Fx::b + e_label + Fx::ub + " "
+					+ Draw::Meter{e_meter, "cpu"}(e_avg)
+					+ Theme::g("cpu").at(clamp(e_avg, 0ll, 100ll)) + e_freq_str
+					+ Theme::c("div_line") + Symbols::v_line;
+				cy++;
+			}
+
+			//? Draw E-cores (indices 0 to e_cores_total-1)
+			const int e_rows = (e_cores_total + b_columns - 1) / b_columns;
+			int e_drawn = 0;
+			for (int row = 0; row < e_rows and e_drawn < e_cores_total and cy < max_row; ++row) {
+				for (int col = 0; col < b_columns and e_drawn < e_cores_total; ++col) {
+					cx = col * col_width;
+					draw_core(e_drawn);
+					e_drawn++;
+				}
+				cy++;
+			}
+			cx = 0;
+		} else
+	#endif
+		{
+			//? Standard layout: all cores in columns
+			for (const auto& n : iota(0, Shared::coreCount)) {
+				draw_core(n);
+
+				if ((++cy > ceil((double)Shared::coreCount / b_columns) or cy == max_row) and n != Shared::coreCount - 1) {
+					if (++cc >= b_columns) break;
+					cy = 1; cx = (b_width / b_columns) * cc;
+				}
 			}
 		}
 
@@ -2277,6 +2411,22 @@ namespace Draw {
 			b_columns = max(2, (int)ceil((double)(Shared::coreCount + 1) / (height - gpus_extra_height - 5)));
 		#else
 			b_columns = max(1, (int)ceil((double)(Shared::coreCount + 1) / (height - 5)));
+		#endif
+		#ifdef __APPLE__
+			//? Apple Silicon P/E layout needs extra rows for section headers.
+			//? Adjust columns so both P-core and E-core sections fit vertically.
+			//? Iterative solution is O(max_cores) ≈ O(16), negligible cost.
+			if (Cpu::cpu_core_info.p_cores > 0 and Cpu::cpu_core_info.e_cores > 0) {
+				const int p_cores = Cpu::cpu_core_info.p_cores;
+				const int e_cores = Cpu::cpu_core_info.e_cores;
+				const int available_rows = height - 5 - 2;  // -2 for P-CPU and E-CPU header bars
+				while (b_columns < Shared::coreCount) {
+					int p_rows = (p_cores + b_columns - 1) / b_columns;
+					int e_rows = (e_cores + b_columns - 1) / b_columns;
+					if (p_rows + e_rows <= available_rows) break;
+					b_columns++;
+				}
+			}
 		#endif
 			if (b_columns * (21 + 12 * show_temp) < width - (width / 3)) {
 				b_column_size = 2;
@@ -2301,6 +2451,22 @@ namespace Draw {
 		#else
 			b_height = min(height - 2, (int)ceil((double)Shared::coreCount / b_columns) + 4);
 		#endif
+		#ifdef __APPLE__
+			//? On Apple Silicon with P/E cores, recalculate b_height based on actual P/E row needs
+			//? P/E layout needs: P-CPU header + P rows + E-CPU header + E rows + base (4)
+			if (Cpu::cpu_core_info.p_cores > 0 and Cpu::cpu_core_info.e_cores > 0) {
+				const int p_cores = Cpu::cpu_core_info.p_cores;
+				const int e_cores = Cpu::cpu_core_info.e_cores;
+				int p_rows = (p_cores + b_columns - 1) / b_columns;
+				int e_rows = (e_cores + b_columns - 1) / b_columns;
+				//? +4 base, +2 for P-CPU and E-CPU headers (we skip default CPU bar, so net +1 from original)
+				int pe_height = p_rows + e_rows + 4 + 1;
+			#ifdef GPU_SUPPORT
+				pe_height += gpus_extra_height;
+			#endif
+				b_height = min(height - 2, pe_height);
+			}
+		#endif
 
 			b_x = x + width - b_width - 1;
 			b_y = y + ceil((double)(height - 2) / 2) - ceil((double)b_height / 2) + 1;

src/btop_shared.hpp

@@ -240,6 +240,19 @@ namespace Cpu {
 
 	auto get_cpuHz() -> string;
 
+#ifdef __APPLE__
+	//* Apple Silicon P-core and E-core information
+	struct core_info {
+		int p_cores = 0;      // Performance cores (perflevel0) - indices e_cores to e_cores+p_cores-1
+		int e_cores = 0;      // Efficiency cores (perflevel1) - indices 0 to e_cores-1
+		int p_freq_mhz = 0;   // Current P-cluster frequency in MHz
+		int e_freq_mhz = 0;   // Current E-cluster frequency in MHz
+	};
+	extern core_info cpu_core_info;
+	auto get_core_info() -> core_info;
+	void update_core_frequencies();  // Update current P/E frequencies via IOReport
+#endif
+
 	//* Get battery info from /sys
 	auto get_battery() -> tuple<int, float, long, string>;
 

src/btop_tools.hpp

@@ -205,6 +205,21 @@ namespace Tools {
 		return str;
 	}
 
+	//* Format CPU frequency: 3 digits max, e.g., "1.9 GHz" or "600 MHz"
+	inline string format_freq(int mhz) {
+		if (mhz <= 0) return "";
+		string str;
+		if (mhz > 999) {
+			str = fmt::format("{:.1f}", mhz / 1000.0);
+			if (str.size() > 3) str.resize(3);
+			if (str.back() == '.') str.pop_back();
+			str += " GHz";
+		} else {
+			str = fmt::format("{} MHz", mhz);
+		}
+		return str;
+	}
+
 	//* Check if vector <vec> contains value <find_val>
 	template <typename T, typename T2>
 	inline bool v_contains(const vector<T>& vec, const T2& find_val) {

src/osx/btop_collect.cpp

@@ -67,6 +67,7 @@ tab-size = 4
 #include "sensors.hpp"
 #endif
 #include "smc.hpp"
+#include "ioreport.hpp"
 
 #if __MAC_OS_X_VERSION_MIN_REQUIRED < 120000
 #define kIOMainPortDefault kIOMasterPortDefault
@@ -109,6 +110,7 @@ namespace Cpu {
 	string cpu_sensor;
 	vector<string> core_sensors;
 	std::unordered_map<int, int> core_mapping;
+	core_info cpu_core_info;
 }  // namespace Cpu
 
 namespace Mem {
@@ -187,6 +189,7 @@ namespace Shared {
 		Cpu::cpuName = Cpu::get_cpuName();
 		Cpu::got_sensors = Cpu::get_sensors();
 		Cpu::core_mapping = Cpu::get_core_mapping();
+		Cpu::cpu_core_info = Cpu::get_core_info();
 
 		//? Init for namespace Mem
 		Mem::old_uptime = system_uptime();
@@ -367,6 +370,42 @@ namespace Cpu {
 		return core_map;
 	}
 
+	auto get_core_info() -> core_info {
+		core_info info;
+		size_t size = sizeof(int);
+
+		// On Apple Silicon:
+		// - perflevel0 = Performance cores (P-cores)
+		// - perflevel1 = Efficiency cores (E-cores)
+		// Note: E-cores are enumerated FIRST (indices 0 to e_cores-1), P-cores SECOND
+		if (sysctlbyname("hw.perflevel0.physicalcpu", &info.p_cores, &size, nullptr, 0) != 0) {
+			info.p_cores = 0;
+		}
+
+		size = sizeof(int);
+		if (sysctlbyname("hw.perflevel1.physicalcpu", &info.e_cores, &size, nullptr, 0) != 0) {
+			info.e_cores = 0;
+		}
+
+		// Fallback: if detection fails (Intel Mac or error), treat all as P-cores
+		if (info.p_cores == 0 and info.e_cores == 0) {
+			info.p_cores = Shared::coreCount;
+		}
+
+		return info;
+	}
+
+	void update_core_frequencies() {
+		//? Initialize IOReport (handles double-init internally)
+		IOReport::init();
+
+		if (IOReport::is_available()) {
+			auto [e_freq, p_freq] = IOReport::get_cpu_frequencies();
+			cpu_core_info.e_freq_mhz = static_cast<int>(e_freq);
+			cpu_core_info.p_freq_mhz = static_cast<int>(p_freq);
+		}
+	}
+
 	class IOPSInfo_Wrap {
 		CFTypeRef data;
 	public:
@@ -431,6 +470,9 @@ namespace Cpu {
 			return current_cpu;
 		auto &cpu = current_cpu;
 
+		//? Update P/E core frequencies
+		update_core_frequencies();
+
 		if (getloadavg(cpu.load_avg.data(), cpu.load_avg.size()) < 0) {
 			Logger::error("failed to get load averages");
 		}