$ for i in `seq 10`; do halcmd getp scope.sample.time; done | tr '\n' ' '; echo
875 916 1083 750 917 1083 1208 1542 1167 834
$ ~/a.out &   # a program designed to swamp L2 cache with memory accesses
[1] 30593
$ for i in `seq 10`; do halcmd getp scope.sample.time; done | tr '\n' ' '; echo
958 1209 959 1125 1584 1334 1791 1167 1458 1500
$ kill %
$
[1]+  Terminated              ~/a.out
$ for i in `seq 10`; do halcmd getp scope.sample.time; done | tr '\n' ' '; echo
1042 834 1250 1292 1083 1083 750 709 875 750