tools/virtio/ringtest/run-on-all.sh

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