4 # This file and its contents are supplied under the terms of the
5 # Common Development and Distribution License ("CDDL"), version 1.0.
6 # You may only use this file in accordance with the terms of version
9 # A full copy of the text of the CDDL should have accompanied this
10 # source. A copy of the CDDL is also available via the Internet at
11 # http://www.illumos.org/license/CDDL.
15 # Copyright (c) 2015, 2021 by Delphix. All rights reserved.
20 # Trigger fio runs using the sequential_reads job file. The number of runs and
21 # data collected is determined by the PERF_* variables. See do_fio_run for
22 # details about these variables.
24 # The files to read from are created prior to the first fio run, and used
25 # for all fio runs. This test will exercise cached read performance from
26 # a clone filesystem. The data is initially cached in the ARC and then
27 # a snapshot and clone are created. All the performance runs are then
28 # initiated against the clone filesystem to exercise the performance of
29 # reads when the ARC has to create another buffer from a different dataset.
30 # It will also exercise the need to evict the duplicate buffer once the last
31 # reference on that buffer is released.
34 . $STF_SUITE/include/libtest.shlib
35 . $STF_SUITE/tests/perf/perf.shlib
45 trap "log_fail \"Measure IO stats during random read load\"" SIGTERM
49 populate_perf_filesystems
51 # Make sure the working set can be cached in the arc. Aim for 1/2 of arc.
52 export TOTAL_SIZE=$(($(get_max_arc_size) / 2))
54 # Variables specific to this test for use by fio.
55 export PERF_NTHREADS=${PERF_NTHREADS:-'64 128'}
56 export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
57 export PERF_IOSIZES=${PERF_IOSIZES:-'128k 1m'}
59 # Layout the files to be used by the read tests. Create as many files as the
60 # largest number of threads. An fio run with fewer threads will use a subset
61 # of the available files.
62 export NUMJOBS=$(get_max $PERF_NTHREADS)
63 export FILE_SIZE=$((TOTAL_SIZE / NUMJOBS))
64 export DIRECTORY=$(get_directory)
65 log_must fio $FIO_SCRIPTS/mkfiles.fio
68 # Only a single filesystem is used by this test. To be defensive, we
69 # double check that TESTFS only contains a single filesystem. We
70 # wouldn't want to assume this was the case, and have it actually
71 # contain multiple filesystem (causing cascading failures later).
73 log_must test $(get_nfilesystems) -eq 1
75 log_note "Creating snapshot, $TESTSNAP, of $TESTFS"
76 create_snapshot $TESTFS $TESTSNAP
77 log_note "Creating clone, $PERFPOOL/$TESTCLONE, from $TESTFS@$TESTSNAP"
78 create_clone $TESTFS@$TESTSNAP $PERFPOOL/$TESTCLONE
81 # We want to run FIO against the clone we created above, and not the
82 # clone's originating filesystem. Thus, we override the default behavior
83 # and explicitly set TESTFS to the clone.
85 export TESTFS=$PERFPOOL/$TESTCLONE
87 # Set up the scripts and output files that will log performance data.
88 lun_list=$(pool_to_lun_list $PERFPOOL)
89 log_note "Collecting backend IO stats with lun list $lun_list"
91 typeset perf_record_cmd="perf record -F 99 -a -g -q \
92 -o /dev/stdout -- sleep ${PERF_RUNTIME}"
94 export collect_scripts=(
95 "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
96 "$PERF_SCRIPTS/prefetch_io.sh $PERFPOOL 1" "prefetch"
97 "vmstat -t 1" "vmstat"
98 "mpstat -P ALL 1" "mpstat"
99 "iostat -tdxyz 1" "iostat"
100 "$perf_record_cmd" "perf"
103 export collect_scripts=(
104 "$PERF_SCRIPTS/io.d $PERFPOOL $lun_list 1" "io"
105 "$PERF_SCRIPTS/prefetch_io.d $PERFPOOL 1" "prefetch"
106 "vmstat -T d 1" "vmstat"
107 "mpstat -T d 1" "mpstat"
108 "iostat -T d -xcnz 1" "iostat"
112 log_note "Sequential cached reads from $DIRECTORY with " \
113 "ettings: $(print_perf_settings)"
114 do_fio_run sequential_reads.fio false false
115 log_pass "Measure IO stats during sequential cached read load"