1#!/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) 2016, 2021 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. The ARC is not cleared to ensure that all data is cached.
26#
27# This is basically a copy of the sequential_reads_cached test case, but with
28# a smaller dataset so that we can fit everything into the decompressed, linear
29# space in the dbuf cache.
30#
31
32. $STF_SUITE/include/libtest.shlib
33. $STF_SUITE/tests/perf/perf.shlib
34
35function cleanup
36{
37	# kill fio and iostat
38	pkill fio
39	pkill iostat
40	recreate_perf_pool
41}
42
43trap "log_fail \"Measure IO stats during sequential read load\"" SIGTERM
44log_onexit cleanup
45
46recreate_perf_pool
47populate_perf_filesystems
48
49# Ensure the working set can be cached in the dbuf cache.
50export TOTAL_SIZE=$(($(get_dbuf_cache_size) * 3 / 4))
51
52# Variables specific to this test for use by fio.
53export PERF_NTHREADS=${PERF_NTHREADS:-'64'}
54export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
55export PERF_IOSIZES=${PERF_IOSIZES:-'64k'}
56
57# Layout the files to be used by the read tests. Create as many files as the
58# largest number of threads. An fio run with fewer threads will use a subset
59# of the available files.
60export NUMJOBS=$(get_max $PERF_NTHREADS)
61export FILE_SIZE=$((TOTAL_SIZE / NUMJOBS))
62export DIRECTORY=$(get_directory)
63log_must fio $FIO_SCRIPTS/mkfiles.fio
64
65# Set up the scripts and output files that will log performance data.
66lun_list=$(pool_to_lun_list $PERFPOOL)
67log_note "Collecting backend IO stats with lun list $lun_list"
68if is_linux; then
69	typeset perf_record_cmd="perf record -F 99 -a -g -q \
70	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
71
72	export collect_scripts=(
73	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
74	    "$PERF_SCRIPTS/prefetch_io.sh $PERFPOOL 1" "prefetch"
75	    "vmstat -t 1" "vmstat"
76	    "mpstat -P ALL 1" "mpstat"
77	    "iostat -tdxyz 1" "iostat"
78	    "$perf_record_cmd" "perf"
79	)
80else
81	export collect_scripts=(
82	    "kstat zfs:0 1" "kstat"
83	    "vmstat -T d 1" "vmstat"
84	    "mpstat -T d 1" "mpstat"
85	    "iostat -T d -xcnz 1" "iostat"
86	    "dtrace -Cs $PERF_SCRIPTS/io.d $PERFPOOL $lun_list 1" "io"
87	    "dtrace -Cs $PERF_SCRIPTS/prefetch_io.d $PERFPOOL 1" "prefetch"
88	    "dtrace -s $PERF_SCRIPTS/profile.d" "profile"
89	)
90fi
91
92log_note "Sequential cached reads with settings: $(print_perf_settings)"
93do_fio_run sequential_reads.fio false false
94log_pass "Measure IO stats during sequential cached read load"
95