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

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