1#!/usr/bin/ksh
2
3#
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
7# 1.0 of the CDDL.
8#
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.
12#
13
14#
15# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
16#
17
18#
19# Description:
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.
23#
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.
32#
33
34. $STF_SUITE/include/libtest.shlib
35. $STF_SUITE/tests/perf/perf.shlib
36
37function cleanup
38{
39	recreate_perf_pool
40}
41
42log_onexit cleanup
43
44recreate_perf_pool
45populate_perf_filesystems
46
47# Make sure the working set can be cached in the arc. Aim for 1/2 of arc.
48export TOTAL_SIZE=$(($(get_max_arc_size) / 2))
49
50# Variables for use by fio.
51if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
52	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
53	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
54	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16 32 64'}
55	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
56	export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'1'}
57	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 128k'}
58elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
59	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
60	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
61	export PERF_NTHREADS=${PERF_NTHREADS:-'64 128'}
62	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
63	export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'1'}
64	export PERF_IOSIZES=${PERF_IOSIZES:-'128k 1m'}
65fi
66
67# Layout the files to be used by the read tests. Create as many files as the
68# largest number of threads. An fio run with fewer threads will use a subset
69# of the available files.
70export NUMJOBS=$(get_max $PERF_NTHREADS)
71export FILE_SIZE=$((TOTAL_SIZE / NUMJOBS))
72export DIRECTORY=$(get_directory)
73log_must fio $FIO_SCRIPTS/mkfiles.fio
74
75#
76# Only a single filesystem is used by this test. To be defensive, we
77# double check that TESTFS only contains a single filesystem. We
78# wouldn't want to assume this was the case, and have it actually
79# contain multiple filesystem (causing cascading failures later).
80#
81log_must test $(get_nfilesystems) -eq 1
82
83log_note "Creating snapshot, $TESTSNAP, of $TESTFS"
84create_snapshot $TESTFS $TESTSNAP
85log_note "Creating clone, $PERFPOOL/$TESTCLONE, from $TESTFS@$TESTSNAP"
86create_clone $TESTFS@$TESTSNAP $PERFPOOL/$TESTCLONE
87
88#
89# We want to run FIO against the clone we created above, and not the
90# clone's originating filesystem. Thus, we override the default behavior
91# and explicitly set TESTFS to the clone.
92#
93export TESTFS=$PERFPOOL/$TESTCLONE
94
95# Set up the scripts and output files that will log performance data.
96lun_list=$(pool_to_lun_list $PERFPOOL)
97log_note "Collecting backend IO stats with lun list $lun_list"
98export collect_scripts=(
99    "kstat zfs:0 1"  "kstat"
100    "vmstat -T d 1"       "vmstat"
101    "mpstat -T d 1"       "mpstat"
102    "iostat -T d -xcnz 1" "iostat"
103    "dtrace -Cs $PERF_SCRIPTS/io.d $PERFPOOL $lun_list 1" "io"
104    "dtrace -Cs $PERF_SCRIPTS/prefetch_io.d $PERFPOOL 1"  "prefetch"
105    "dtrace  -s $PERF_SCRIPTS/profile.d"                  "profile"
106)
107
108log_note "Sequential cached reads from $DIRECTORY with $PERF_RUNTYPE settings"
109do_fio_run sequential_reads.fio false false
110log_pass "Measure IO stats during sequential cached read load"
111