Merge pull request #1253 from Darkclainer/per-core-cpu-usage

Add cpu usage for every core

include/modules/cpu.hpp

@@ -20,7 +20,7 @@ class Cpu : public ALabel {
 
  private:
   double                                         getCpuLoad();
-  std::tuple<uint16_t, std::string>       getCpuUsage();
+  std::tuple<std::vector<uint16_t>, std::string> getCpuUsage();
   std::tuple<float, float, float>                getCpuFrequency();
   std::vector<std::tuple<size_t, size_t>>        parseCpuinfo();
   std::vector<float>                             parseCpuFrequencies();

man/waybar-cpu.5.scd

@@ -82,7 +82,9 @@ The *cpu* module displays the current cpu utilization.
 
 *{load}*: Current cpu load.
 
-*{usage}*: Current cpu usage.
+*{usage}*: Current overall cpu usage.
+
+*{usage*{n}*}*: Current cpu core n usage. Cores are numbered from zero, so first core will be {usage0} and 4th will be {usage3}.
 
 *{avg_frequency}*: Current cpu average frequency (based on all cores) in GHz.
 
@@ -90,7 +92,13 @@ The *cpu* module displays the current cpu utilization.
 
 *{min_frequency}*: Current cpu min frequency (based on the core with the lowest frequency) in GHz.
 
-# EXAMPLE
+*{icon}*: Icon for overall cpu usage.
+
+*{icon*{n}*}*: Icon for cpu core n usage. Use like {icon0}.
+
+# EXAMPLES
+
+Basic configuration:
 
 ```
 "cpu": {
@@ -100,6 +108,16 @@ The *cpu* module displays the current cpu utilization.
 }
 ```
 
+Cpu usage per core rendered as icons:
+
+```
+"cpu": {
+	"interval": 1,
+	"format": "{icon0}{icon1}{icon2}{icon3} {usage:>2}% ",
+	"format-icons": ["▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"],
+},
+```
+
 # STYLE
 
 - *#cpu*

src/modules/cpu/common.cpp

@@ -1,5 +1,14 @@
 #include "modules/cpu.hpp"
 
+// In the 80000 version of fmt library authors decided to optimize imports
+// and moved declarations required for fmt::dynamic_format_arg_store in new
+// header fmt/args.h
+#if (FMT_VERSION >= 80000)
+#include <fmt/args.h>
+#else
+#include <fmt/core.h>
+#endif
+
 waybar::modules::Cpu::Cpu(const std::string& id, const Json::Value& config)
     : ALabel(config, "cpu", id, "{usage}%", 10) {
   thread_ = [this] {
@@ -17,7 +26,8 @@ auto waybar::modules::Cpu::update() -> void {
     label_.set_tooltip_text(tooltip);
   }
   auto format = format_;
-  auto state = getState(cpu_usage);
+  auto total_usage = cpu_usage.empty() ? 0 : cpu_usage[0];
+  auto state = getState(total_usage);
   if (!state.empty() && config_["format-" + state].isString()) {
     format = config_["format-" + state].asString();
   }
@@ -27,13 +37,22 @@ auto waybar::modules::Cpu::update() -> void {
   } else {
     event_box_.show();
     auto icons = std::vector<std::string>{state};
-    label_.set_markup(fmt::format(format,
-                                  fmt::arg("load", cpu_load),
-                                  fmt::arg("usage", cpu_usage),
-                                  fmt::arg("icon", getIcon(cpu_usage, icons)),
-                                  fmt::arg("max_frequency", max_frequency),
-                                  fmt::arg("min_frequency", min_frequency),
-                                  fmt::arg("avg_frequency", avg_frequency)));
+    fmt::dynamic_format_arg_store<fmt::format_context> store;
+    store.push_back(fmt::arg("load", cpu_load));
+    store.push_back(fmt::arg("load", cpu_load));
+    store.push_back(fmt::arg("usage", total_usage));
+    store.push_back(fmt::arg("icon", getIcon(total_usage, icons)));
+    store.push_back(fmt::arg("max_frequency", max_frequency));
+    store.push_back(fmt::arg("min_frequency", min_frequency));
+    store.push_back(fmt::arg("avg_frequency", avg_frequency));
+    for (size_t i = 1; i < cpu_usage.size(); ++i) {
+	    auto core_i = i - 1;
+	    auto core_format = fmt::format("usage{}", core_i);
+	    store.push_back(fmt::arg(core_format.c_str(), cpu_usage[i]));
+	    auto icon_format = fmt::format("icon{}", core_i);
+	    store.push_back(fmt::arg(icon_format.c_str(), getIcon(cpu_usage[i], icons)));
+    }
+    label_.set_markup(fmt::vformat(format, store));
   }
 
   // Call parent update
@@ -48,14 +67,14 @@ double waybar::modules::Cpu::getCpuLoad() {
   throw std::runtime_error("Can't get Cpu load");
 }
 
-std::tuple<uint16_t, std::string> waybar::modules::Cpu::getCpuUsage() {
+std::tuple<std::vector<uint16_t>, std::string> waybar::modules::Cpu::getCpuUsage() {
   if (prev_times_.empty()) {
     prev_times_ = parseCpuinfo();
     std::this_thread::sleep_for(std::chrono::milliseconds(100));
   }
   std::vector<std::tuple<size_t, size_t>> curr_times = parseCpuinfo();
   std::string                             tooltip;
-  uint16_t                                usage = 0;
+  std::vector<uint16_t>                   usage;
   for (size_t i = 0; i < curr_times.size(); ++i) {
     auto [curr_idle, curr_total] = curr_times[i];
     auto [prev_idle, prev_total] = prev_times_[i];
@@ -63,11 +82,11 @@ std::tuple<uint16_t, std::string> waybar::modules::Cpu::getCpuUsage() {
     const float delta_total = curr_total - prev_total;
     uint16_t    tmp = 100 * (1 - delta_idle / delta_total);
     if (i == 0) {
-      usage = tmp;
       tooltip = fmt::format("Total: {}%", tmp);
     } else {
       tooltip = tooltip + fmt::format("\nCore{}: {}%", i - 1, tmp);
     }
+    usage.push_back(tmp);
   }
   prev_times_ = curr_times;
   return {usage, tooltip};