From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Wed, 20 Mar 2019 00:44:49 +0000 (-0700)
Subject: check: really improve test list randomization
X-Git-Tag: v2022.05.01~1223
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=97fd33c767409c382fd8a7b368f7d1fc23fe75a4;p=xfstests-dev.git

check: really improve test list randomization

coreutils provides the shuf(1) utility that randomizes the order of a
list and seeds its random number generator with /dev/urandom.  It's a
bit speedier than awk, so use it if available.

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>
---

diff --git a/check b/check
index ecd1d39a..a2c5ba21 100755
--- a/check
+++ b/check
@@ -243,7 +243,11 @@ _prepare_test_list()
 
 	# sort the list of tests into numeric order
 	if $randomize; then
-		sorter="awk -v seed=$RANDOM -f randomize.awk"
+		if type shuf >& /dev/null; then
+			sorter="shuf"
+		else
+			sorter="awk -v seed=$RANDOM -f randomize.awk"
+		fi
 	else
 		sorter="cat"
 	fi