rants, tirades, ruminations

#!/usr/bin/env zsh

keyboard_id="04d9:0169"
mouse_id="046d:c24a"

keyboard=$(lsusb | grep "${keyboard_id}" | cut -d ' ' -f 2,4 | grep -Eo '[[:digit:]]+' | sed -e 's/^0*//' | xargs -n 2 | sed -e 's/ /./')
mouse=$(lsusb | grep "${mouse_id}" | cut -d ' ' -f 2,4 | grep -Eo '[[:digit:]]+' | sed -e 's/^0*//' | xargs -n 2 | sed -e 's/ /./')

if [[ -z "${keyboard}" || -z "${mouse}" ]]; then
        echo "keyboard (${keyboard}) or mouse (${mouse}) cannot be found; exiting"
        exit 1
fi

for i in {4..7}; do
        echo performance > /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
        #cat /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
done

taskset -ac 4-7 qemu-system-x86_64 \
        -qmp unix:/run/qmp-sock,server,nowait \
        -display none \
        -enable-kvm \
        -M q35,accel=kvm \
        -m 8192 \
        -cpu host,kvm=off \
        -smp 4,sockets=1,cores=4,threads=1 \
        -mem-path /dev/hugepages \
        -rtc base=localtime,driftfix=slew \
        -device ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root \
        -device vfio-pci,host=02:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on -vga none \
        -device vfio-pci,host=02:00.1,bus=root,addr=00.1 \
        -usb -usbdevice host:${keyboard} -usbdevice host:${mouse} \
        -device virtio-scsi-pci,id=scsi \
        -drive if=none,file=/dev/win/cdrive,format=raw,cache=none,id=win-c -device scsi-hd,drive=win-c \
        -drive if=none,format=raw,file=/dev/sr0,id=blu-ray -device scsi-block,drive=blu-ray \
        -device virtio-net-pci,netdev=net0 -netdev bridge,id=net0,helper=/usr/lib/qemu/qemu-bridge-helper &

sleep 5

#cpuid=0
cpuid=4
for threadpid in $(echo 'query-cpus' | qmp-shell /run/qmp-sock | grep '^(QEMU) {"return":' | sed -e 's/^(QEMU) //' | jq -r '.return[].thread_id'); do
        taskset -p -c ${cpuid} ${threadpid}
        ((cpuid+=1))
done

wait

for i in {4..7}; do
        echo ondemand > /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
        #cat /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
done