58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/*
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* Copyright (C) 2023 Bernd Herzog
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "performance_counter.hpp"
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#include "ch.h"
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uint8_t get_cpu_utilisation_in_percent() {
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static systime_t last_time = 0;
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static systime_t last_idle_ticks = 0;
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auto now = chTimeNow();
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auto idle_ticks = chThdGetTicks(chSysGetIdleThread());
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if (last_time == 0) {
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last_time = now;
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last_idle_ticks = idle_ticks;
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return 0;
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}
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int32_t time_elapsed = now - last_time;
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int32_t idle_elapsed = idle_ticks - last_idle_ticks;
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int32_t working_ticks = time_elapsed - idle_elapsed;
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if (working_ticks < 0)
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working_ticks = 0;
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auto utilisation = working_ticks * 100 / time_elapsed;
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last_time = now;
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last_idle_ticks = idle_ticks;
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if (utilisation > 100) {
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return 100;
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}
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return (uint8_t)utilisation;
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}
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