run-on-all.sh

 1#!/bin/sh
 2# SPDX-License-Identifier: GPL-2.0
 3
 4CPUS_ONLINE=$(lscpu --online -p=cpu|grep -v -e '#')
 5#use last CPU for host. Why not the first?
 6#many devices tend to use cpu0 by default so
 7#it tends to be busier
 8HOST_AFFINITY=$(echo "${CPUS_ONLINE}"|tail -n 1)
 9
10#run command on all cpus
11for cpu in $CPUS_ONLINE
12do
13	#Don't run guest and host on same CPU
14	#It actually works ok if using signalling
15	if
16		(echo "$@" | grep -e "--sleep" > /dev/null) || \
17			test $HOST_AFFINITY '!=' $cpu
18	then
19		echo "GUEST AFFINITY $cpu"
20		"$@" --host-affinity $HOST_AFFINITY --guest-affinity $cpu
21	fi
22done
23echo "NO GUEST AFFINITY"
24"$@" --host-affinity $HOST_AFFINITY
25echo "NO AFFINITY"
26"$@"