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cpu: port parseCpuinfo to BSDs

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This commit is contained in:
Jan Beich
2019-08-11 13:10:37 +00:00
parent c4f7cdeec4
commit 4e567d0483
7 changed files with 136 additions and 30 deletions
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83
src/modules/cpu.cpp
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@ -1,83 +0,0 @@
#include "modules/cpu.hpp"
#include <numeric>
waybar::modules::Cpu::Cpu(const std::string& id, const Json::Value& config)
: ALabel(config, "cpu", id, "{usage}%", 10) {
thread_ = [this] {
dp.emit();
thread_.sleep_for(interval_);
};
}
auto waybar::modules::Cpu::update() -> void {
// TODO: as creating dynamic fmt::arg arrays is buggy we have to calc both
auto cpu_load = getCpuLoad();
auto [cpu_usage, tooltip] = getCpuUsage();
if (tooltipEnabled()) {
label_.set_tooltip_text(tooltip);
}
label_.set_markup(fmt::format(format_, fmt::arg("load", cpu_load), fmt::arg("usage", cpu_usage)));
getState(cpu_usage);
// Call parent update
ALabel::update();
}
uint16_t waybar::modules::Cpu::getCpuLoad() {
double load[1];
if (getloadavg(load, 1) != -1) {
return load[0] * 100 / sysconf(_SC_NPROCESSORS_ONLN);
}
throw std::runtime_error("Can't get Cpu load");
}
std::tuple<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;
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];
const float delta_idle = curr_idle - prev_idle;
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);
}
}
prev_times_ = curr_times;
return {usage, tooltip};
}
std::vector<std::tuple<size_t, size_t>> waybar::modules::Cpu::parseCpuinfo() {
std::ifstream info(data_dir_);
if (!info.is_open()) {
throw std::runtime_error("Can't open " + data_dir_);
}
std::vector<std::tuple<size_t, size_t>> cpuinfo;
std::string line;
while (getline(info, line)) {
if (line.substr(0, 3).compare("cpu") != 0) {
break;
}
std::stringstream sline(line.substr(5));
std::vector<size_t> times;
for (size_t time = 0; sline >> time; times.push_back(time))
;
size_t idle_time = 0;
size_t total_time = 0;
if (times.size() >= 4) {
idle_time = times[3];
total_time = std::accumulate(times.begin(), times.end(), 0);
}
cpuinfo.emplace_back(idle_time, total_time);
}
return cpuinfo;
}