gd_core_toggler.sh

#!/usr/bin/env bash
toggle_cores() {
    # create comma-delimited core list
    a=()
    for ((i=$1; i < ${num_cores}; i++)); do
        a+=(${i})
    done
    delim_cores=$(IFS=,; echo "${a[*]}")
    # turn cores on/off
    taskset -pac ${delim_cores} "${game_pid}"
}

# gather core and game info
num_cores=$(nproc)
if pgrep "Grim Dawn.exe" > /dev/null 2>&1; then
    game_pid="$(pidof 'Grim Dawn.exe')"
elif pgrep "GrimInternals64.exe" > /dev/null 2>&1; then
    game_pid="$(pidof 'GrimInternals64.exe')"
fi

# toggle Core 0, assuming no issues found
if [[ ${num_cores} -gt 0 ]]; then
    echo "${num_cores} cores found, continuing..."
    if [[ ${game_pid} -gt 0 ]]; then
        # disable Core 0
        toggle_cores 1
        echo -e "Step 1/2: Core 0 disabled, continuing...\n"
        # wait a bit
        for ((i=8; i >= 0; i--)); do
            echo -e "\e[1A\e[K(waiting ${i} seconds)"
            sleep 1
        done
        # re-enable Core 0
        toggle_cores 0
        echo "Step 2/2: Core 0 re-enabled, process complete!"
    else
        echo "ERROR: Game process not detected (must be running to work)."
    fi
else
    echo "ERROR: Number of cores couldn't be detected."
fi