1#!/bin/ksh -p
2#
3# CDDL HEADER START
4#
5# This file and its contents are supplied under the terms of the
6# Common Development and Distribution License ("CDDL"), version 1.0.
7# You may only use this file in accordance with the terms of version
8# 1.0 of the CDDL.
9#
10# A full copy of the text of the CDDL should have accompanied this
11# source.  A copy of the CDDL is also available via the Internet at
12# http://www.illumos.org/license/CDDL.
13#
14# CDDL HEADER END
15#
16
17#
18# Copyright (c) 2020, Adam Moss. All rights reserved.
19#
20
21. $STF_SUITE/include/libtest.shlib
22. $STF_SUITE/tests/functional/l2arc/l2arc.cfg
23
24#
25# DESCRIPTION:
26#	l2arc_misses does not increment upon reads from a pool without l2arc
27#
28# STRATEGY:
29#	1. Create pool with a cache device.
30#	2. Create pool without a cache device.
31#	3. Create a random file in the no-cache-device pool,
32#		and random read for 10 sec.
33#	4. Check that l2arc_misses hasn't risen
34#	5. Create a random file in the pool with the cache device,
35#		and random read for 10 sec.
36#	6. Check that l2arc_misses has risen
37#
38
39verify_runnable "global"
40
41command -v fio > /dev/null || log_unsupported "fio missing"
42
43log_assert "l2arc_misses does not increment upon reads from a pool without l2arc."
44
45function cleanup
46{
47	if poolexists $TESTPOOL ; then
48		destroy_pool $TESTPOOL
49	fi
50	if poolexists $TESTPOOL1 ; then
51		destroy_pool $TESTPOOL1
52	fi
53}
54log_onexit cleanup
55
56typeset fill_mb=800
57typeset cache_sz=$(( 1.4 * $fill_mb ))
58export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M
59
60log_must truncate -s ${cache_sz}M $VDEV_CACHE
61
62log_must zpool create -O compression=off -f $TESTPOOL $VDEV cache $VDEV_CACHE
63log_must zpool create -O compression=off -f $TESTPOOL1 $VDEV1
64
65# I/O to pool without l2arc - expect that l2_misses stays constant
66export DIRECTORY=/$TESTPOOL1
67log_must fio $FIO_SCRIPTS/mkfiles.fio
68log_must fio $FIO_SCRIPTS/random_reads.fio
69# attempt to remove entries for pool from ARC so we would try
70#    to hit the nonexistent L2ARC for subsequent reads
71log_must zpool export $TESTPOOL1
72log_must zpool import $TESTPOOL1 -d $VDEV1
73
74typeset starting_miss_count=$(get_arcstat l2_misses)
75
76log_must fio $FIO_SCRIPTS/random_reads.fio
77log_must test $(get_arcstat l2_misses) -eq $starting_miss_count
78
79# I/O to pool with l2arc - expect that l2_misses rises
80export DIRECTORY=/$TESTPOOL
81log_must fio $FIO_SCRIPTS/mkfiles.fio
82log_must fio $FIO_SCRIPTS/random_reads.fio
83# wait for L2ARC writes to actually happen
84arcstat_quiescence_noecho l2_size
85# attempt to remove entries for pool from ARC so we would try
86#    to hit L2ARC for subsequent reads
87log_must zpool export $TESTPOOL
88log_must zpool import $TESTPOOL -d $VDEV
89
90log_must fio $FIO_SCRIPTS/random_reads.fio
91log_must test $(get_arcstat l2_misses) -gt $starting_miss_count
92
93log_must zpool destroy -f $TESTPOOL
94log_must zpool destroy -f $TESTPOOL1
95
96log_pass "l2arc_misses does not increment upon reads from a pool without l2arc."
97