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zloop: Add a max iterations option, use default run/pass times

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It is useful to have control over the number of iterations of zloop so
we can easily produce "x core dumps found *in y iterations*" metrics.

Using random values for run/pass times doesn't improve coverage in a
meaningful way.

Randomizing run time could be seen as a compromise between running a
greater variety of shorter tests versus a smaller variety of longer
tests within a fixed time span.  However, it is not desirable when
running a fixed number of iterations.

Pass time already incorporates randomness within ztest.

Either parameter can be passed to ztest explicitly if the defaults are
not satisfactory.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #12411
This commit is contained in:
Ryan Moeller 2021-07-22 17:29:27 -04:00 committed by GitHub
parent 46197dc858
commit 14b43fbd9c
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2 changed files with 34 additions and 28 deletions
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2
.github/workflows/zloop.yml vendored
View File

@ -45,7 +45,7 @@ jobs:
run: |
sudo mkdir -p $TEST_DIR
# run for 20 minutes to have a total runner time of 30 minutes
sudo /usr/share/zfs/zloop.sh -t 1200 -l -m1
sudo /usr/share/zfs/zloop.sh -t 1200 -l -m1 -- -T 120 -P 60
- name: Prepare artifacts
if: failure()
run: |

60
scripts/zloop.sh
View File

@ -38,25 +38,30 @@ DEFAULTCOREDIR=/var/tmp/zloop
function usage
{
echo -e "\n$0 [-t <timeout>] [ -s <vdev size> ] [-c <dump directory>]" \
"[ -- [extra ztest parameters]]\n" \
"\n" \
" This script runs ztest repeatedly with randomized arguments.\n" \
" If a crash is encountered, the ztest logs, any associated\n" \
" vdev files, and core file (if one exists) are moved to the\n" \
" output directory ($DEFAULTCOREDIR by default). Any options\n" \
" after the -- end-of-options marker will be passed to ztest.\n" \
"\n" \
" Options:\n" \
" -t Total time to loop for, in seconds. If not provided,\n" \
" zloop runs forever.\n" \
" -s Size of vdev devices.\n" \
" -f Specify working directory for ztest vdev files.\n" \
" -c Specify a core dump directory to use.\n" \
" -m Max number of core dumps to allow before exiting.\n" \
" -l Create 'ztest.core.N' symlink to core directory.\n" \
" -h Print this help message.\n" \
"" >&2
cat >&2 <<EOF
$0 [-hl] [-c <dump directory>] [-f <vdev directory>]
[-m <max core dumps>] [-s <vdev size>] [-t <timeout>]
[-I <max iterations>] [-- [extra ztest parameters]]
This script runs ztest repeatedly with randomized arguments.
If a crash is encountered, the ztest logs, any associated
vdev files, and core file (if one exists) are moved to the
output directory ($DEFAULTCOREDIR by default). Any options
after the -- end-of-options marker will be passed to ztest.
Options:
-c Specify a core dump directory to use.
-f Specify working directory for ztest vdev files.
-h Print this help message.
-l Create 'ztest.core.N' symlink to core directory.
-m Max number of core dumps to allow before exiting.
-s Size of vdev devices.
-t Total time to loop for, in seconds. If not provided,
zloop runs forever.
-I Max number of iterations to loop before exiting.
EOF
}
function or_die
@ -185,10 +190,12 @@ timeout=0
size="512m"
coremax=0
symlink=0
while getopts ":ht:m:s:c:f:l" opt; do
iterations=0
while getopts ":ht:m:I:s:c:f:l" opt; do
case $opt in
t ) [[ $OPTARG -gt 0 ]] && timeout=$OPTARG ;;
m ) [[ $OPTARG -gt 0 ]] && coremax=$OPTARG ;;
I ) [[ $OPTARG ]] && iterations=$OPTARG ;;
s ) [[ $OPTARG ]] && size=$OPTARG ;;
c ) [[ $OPTARG ]] && coredir=$OPTARG ;;
f ) [[ $OPTARG ]] && basedir=$(readlink -f "$OPTARG") ;;
@ -233,9 +240,14 @@ ztrc=0 # ztest return value
foundcrashes=0 # number of crashes found so far
starttime=$(date +%s)
curtime=$starttime
iteration=0
# if no timeout was specified, loop forever.
while [[ $timeout -eq 0 ]] || [[ $curtime -le $((starttime + timeout)) ]]; do
while (( timeout == 0 )) || (( curtime <= (starttime + timeout) )); do
if (( iterations > 0 )) && (( iteration++ == iterations )); then
break
fi
zopt="-G -VVVVV"
# start each run with an empty directory
@ -284,10 +296,6 @@ while [[ $timeout -eq 0 ]] || [[ $curtime -le $((starttime + timeout)) ]]; do
raid_type="draid"
fi
# run from 30 to 120 seconds
runtime=$(((RANDOM % 90) + 30))
passtime=$((RANDOM % (runtime / 3 + 1) + 10))
zopt="$zopt -K $raid_type"
zopt="$zopt -m $mirrors"
zopt="$zopt -r $raid_children"
@ -297,8 +305,6 @@ while [[ $timeout -eq 0 ]] || [[ $curtime -le $((starttime + timeout)) ]]; do
zopt="$zopt -v $vdevs"
zopt="$zopt -a $align"
zopt="$zopt -C $class"
zopt="$zopt -T $runtime"
zopt="$zopt -P $passtime"
zopt="$zopt -s $size"
zopt="$zopt -f $workdir"