awk doesn't have a particularly good random number generator -- it seeds
from the Unix epoch time in seconds, which means that the run order
across a bunch of VMs started at exactly the same time are unsettlingly
predictable. Therefore, at least try to seed it with bash's $RANDOM,
which is slightly less predictable.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
done
# sort the list of tests into numeric order
done
# sort the list of tests into numeric order
- list=`sort -n $tmp.list | uniq`
- rm -f $tmp.list
-
- if $randomize
- then
- list=`echo $list | awk -f randomize.awk`
+ if $randomize; then
+ sorter="awk -v seed=$RANDOM -f randomize.awk"
+ else
+ sorter="cat"
+ list=`sort -n $tmp.list | uniq | $sorter`
+ rm -f $tmp.list
}
# Process command arguments first.
}
# Process command arguments first.
+BEGIN {
+ srand(seed)
+}
- srand()
- for (i = 0; i < NF; i++ ) array[i] = $(i+1)
- randomize(array, NF)
- for (i = 0; i < NF; i++) printf("%s ", array[i])
+ array[NR - 1] = $0
+}
+END {
+ randomize(array, NR)
+ for (i = 0; i < NR; i++) printf("%s ", array[i])