usr/src/test/zfs-tests/tests/perf/regression/sequential_reads_cached_clone.ksh

   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
  37 function cleanup
  38 {
  39         log_must zfs destroy $TESTFS
  40 }
  41
  42 log_assert "Measure IO stats during sequential read load"
  43 log_onexit cleanup
  44
  45 export TESTFS=$PERFPOOL/testfs
  46 recreate_perfpool
  47 log_must zfs create $PERF_FS_OPTS $TESTFS
  48
  49 # Make sure the working set can be cached in the arc. Aim for 1/2 of arc.
  50 export TOTAL_SIZE=$(($(get_max_arc_size) / 2))
  51
  52 # Variables for use by fio.
  53 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
  54         export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
  55         export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
  56         export PERF_NTHREADS=${PERF_NTHREADS:-'16 64'}
  57         export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'1'}
  58         export PERF_IOSIZES=${PERF_IOSIZES:-'64k 128k 1m'}
  59 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
  60         export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
  61         export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
  62         export PERF_NTHREADS=${PERF_NTHREADS:-'64 128'}
  63         export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'1'}
  64         export PERF_IOSIZES=${PERF_IOSIZES:-'128k 1m'}
  65 fi
  66
  67 # Layout the files to be used by the read tests. Create as many files as the
  68 # largest number of threads. An fio run with fewer threads will use a subset
  69 # of the available files.
  70 export NUMJOBS=$(get_max $PERF_NTHREADS)
  71 export FILE_SIZE=$((TOTAL_SIZE / NUMJOBS))
  72 log_must fio $FIO_SCRIPTS/mkfiles.fio
  73
  74 log_note "Creating snapshot, $TESTSNAP, of $TESTFS"
  75 create_snapshot $TESTFS $TESTSNAP
  76 log_note "Creating clone, $PERFPOOL/$TESTCLONE, from $TESTFS@$TESTSNAP"
  77 create_clone $TESTFS@$TESTSNAP $PERFPOOL/$TESTCLONE
  78
  79 #
  80 # Reset the TESTFS to point to the clone
  81 #
  82 export TESTFS=$PERFPOOL/$TESTCLONE
  83
  84 # Set up the scripts and output files that will log performance data.
  85 lun_list=$(pool_to_lun_list $PERFPOOL)
  86 log_note "Collecting backend IO stats with lun list $lun_list"
  87 export collect_scripts=("$PERF_SCRIPTS/io.d $PERFPOOL $lun_list 1" "io"
  88     "$PERF_SCRIPTS/prefetch_io.d $PERFPOOL 1" "prefetch" "vmstat 1" "vmstat"
  89     "mpstat 1" "mpstat" "iostat -xcnz 1" "iostat")
  90
  91 log_note "Sequential cached reads from $TESTFS with $PERF_RUNTYPE settings"
  92 do_fio_run sequential_reads.fio false false
  93 log_pass "Measure IO stats during sequential cached read load"