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

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