Monitor CPU function

monitor_cpu.txt

# This function will periodically print cpu information about the given process name 
# Place it in your .zshrc or equivalent file or modify it to run via #!/bin/zsh
#
# Usage: monitor_cpu mediaanalysisd 28800 5 > ~/Desktop/cpu_log.txt
#   Monitors processes containing "mediaanalysisd" for 12 hours reporting every 5 seconds
#
# Run this to output statistics:
# cat ~/Desktop/cpu_log.txt | grep "mediaanalysisd " | grep -v "0.0" | awk '{sum += $NF; count++} END {if (count > 0) {print sum / count; print count;} else print "No data"}'

function monitor_cpu() {
    local process_name=$1
    local max_seconds=$2
    local sleep_interval=$3

    if [[ -z "$process_name" || -z "$max_seconds" || -z "$sleep_interval" ]]; then
        echo "Usage: monitor_cpu <process_name> <max_seconds_to_run> <seconds_to_sleep_between_runs>"
        return 1
    fi

    local iterations=$((max_seconds / sleep_interval))

    if (( iterations < 1)); then
        iterations=1
    fi

    echo "Monitoring CPU usage for process: ${process_name}"
    echo "Max duration: ${max_seconds}s, Sleep interval: ${sleep_interval}s"
    echo "Iterations: ${iterations}"

    for i in {1..${iterations}}; do
        local current_time=$(date -Iseconds)
        local matched_processes=$(ps -Ao user,pid,%cpu,%mem,comm | grep "${process_name}")

        if [[ -n "${matched_processes}" ]]; then
            echo "${matched_processes}" | while read -r line; do
                local cpu=$(echo "${line}" | awk '{print $3}')
                local full_path=$(echo "${line}" | awk '{print $5}')
                local base_name=$(basename "${full_path}")

                echo "${current_time} ${base_name} ${cpu}"
            done
        else
            echo "${current_time}"
        fi

        if (( i < iterations )); then
            sleep "${sleep_interval}"
        fi
    done
}