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dotfiles/scripts/cpu
2025-04-07 11:05:18 +01:00

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#!/bin/sh
# Script to display CPU usage
RED="\e[31m"
GREEN="\e[32m"
YELLOW="\e[33m"
CYAN="\e[36m"
ENDCOLOR="\e[0m"
# Cache in tmpfs to improve speed and reduce SSD load
cache=/tmp/cpu-script-cache
rm /tmp/cpu-script-cache 2>/dev/null
while true; do
sleep 1
cpu_stats=$(awk '/^cpu / {print $2 + $3 + $4 + $5, $5}' /proc/stat)
if [ ! -f "$cache" ]; then
echo -n "${CYAN}--%${ENDCOLOR} \r"
echo "$cpu_stats" >"$cache"
continue
fi
prev_stats=$(cat "$cache")
total=$(echo "$prev_stats" | awk '{print $1}')
prev_idle=$(echo "$prev_stats" | awk '{print $2}')
curr_total=$(echo "$cpu_stats" | awk '{print $1}')
curr_idle=$(echo "$cpu_stats" | awk '{print $2}')
total_diff=$((curr_total - total))
idle_diff=$((curr_idle - prev_idle))
if [ "$total_diff" -eq 0 ]; then
usage=0 # Avoid division by zero
else
usage=$((100 * (total_diff - idle_diff) / total_diff))
fi
if [ "$usage" -lt 50 ]; then
echo -n "${GREEN}${usage}%${ENDCOLOR} \r"
elif [ "$usage" -lt 70 ]; then
echo -n "${YELLOW}${usage}%${ENDCOLOR} \r"
else
echo -n "${RED}${usage}%${ENDCOLOR} \r"
fi
echo "$cpu_stats" >"$cache"
done