2 # SPDX-License-Identifier: GPL-2.0+
3 # Copyright (c) 2019 Oracle, Inc. All Rights Reserved.
7 # Stress test creating a lot of unlinked O_TMPFILE files and closing them
8 # all at once, checking that we don't blow up the filesystem. This is sort
9 # of a performance test for the xfs unlinked inode backref patchset, but it
10 # applies to most other filesystems.
12 # Use every CPU possible to stress the filesystem.
15 seqres=$RESULT_DIR/$seq
16 echo "QA output created by $seq"
18 status=1 # failure is the default!
19 testfile=$TEST_DIR/$seq.txt
20 trap "_cleanup; exit \$status" 0 1 2 3 15
28 # get standard environment, filters and checks
31 # real QA test starts here
35 _require_test_program "t_open_tmpfiles"
38 _scratch_mkfs >> $seqres.full 2>&1
41 # Try to load up all the CPUs, two threads per CPU.
42 nr_cpus=$(( $(getconf _NPROCESSORS_ONLN) * 2 ))
44 # Set ULIMIT_NOFILE to min(file-max / $nr_cpus / 2, 50000 files per LOAD_FACTOR)
45 # so that this test doesn't take forever or OOM the box
46 max_files=$((50000 * LOAD_FACTOR))
47 max_allowable_files=$(( $(cat /proc/sys/fs/file-max) / $nr_cpus / 2 ))
48 test $max_allowable_files -gt 0 && test $max_files -gt $max_allowable_files && \
49 max_files=$max_allowable_files
52 # Open a lot of unlinked files
53 echo create >> $seqres.full
54 for i in $(seq 1 $nr_cpus); do
56 $here/src/t_open_tmpfiles $SCRATCH_MNT/$i >> $seqres.full &
60 # Unmount to prove that we can clean it all
61 echo umount >> $seqres.full
65 echo "Unmount took $((after - before))s." >> $seqres.full
67 # Mount so that we can run the usual checks
68 echo silence is golden