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selftests: ublk: add stress test for per io daemons

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Add a new test_stress_06 for the per io daemons feature. This is just a
copy of test_stress_01 with the per_io_tasks flag added, with varying
amounts of nthreads. This test is able to reproduce a panic which was
caught manually during development [1]; in the current version of this
patch set, it passes.

Note that this commit also makes all stress tests using the
run_io_and_remove helper more stressful by additionally exercising the
batch submit (queue_rqs) path.

[1] https://lore.kernel.org/linux-block/aDgwGoGCEpwd1mFY@fedora/

Suggested-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Uday Shankar <ushankar@purestorage.com>
Link: https://lore.kernel.org/r/20250529-ublk_task_per_io-v8-8-e9d3b119336a@purestorage.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Uday Shankar
2025-05-29 17:47:17 -06:00
committed by Jens Axboe
parent 236918d3e9
commit 17574aa2a0
3 changed files with 42 additions and 0 deletions
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1
tools/testing/selftests/ublk/Makefile
View File

@@ -38,6 +38,7 @@ TEST_PROGS += test_stress_02.sh
TEST_PROGS += test_stress_03.sh
TEST_PROGS += test_stress_04.sh
TEST_PROGS += test_stress_05.sh
TEST_PROGS += test_stress_06.sh
TEST_GEN_PROGS_EXTENDED = kublk

5
tools/testing/selftests/ublk/test_common.sh
View File

@@ -278,6 +278,11 @@ __run_io_and_remove()
fio --name=job1 --filename=/dev/ublkb"${dev_id}" --ioengine=libaio \
--rw=randrw --norandommap --iodepth=256 --size="${size}" --numjobs="$(nproc)" \
--runtime=20 --time_based > /dev/null 2>&1 &
fio --name=batchjob --filename=/dev/ublkb"${dev_id}" --ioengine=io_uring \
--rw=randrw --norandommap --iodepth=256 --size="${size}" \
--numjobs="$(nproc)" --runtime=20 --time_based \
--iodepth_batch_submit=32 --iodepth_batch_complete_min=32 \
--force_async=7 > /dev/null 2>&1 &
sleep 2
if [ "${kill_server}" = "yes" ]; then
local state

36
tools/testing/selftests/ublk/test_stress_06.sh Executable file
View File

@@ -0,0 +1,36 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
. "$(cd "$(dirname "$0")" && pwd)"/test_common.sh
TID="stress_06"
ERR_CODE=0
ublk_io_and_remove()
{
run_io_and_remove "$@"
ERR_CODE=$?
if [ ${ERR_CODE} -ne 0 ]; then
echo "$TID failure: $*"
_show_result $TID $ERR_CODE
fi
}
if ! _have_program fio; then
exit "$UBLK_SKIP_CODE"
fi
_prep_test "stress" "run IO and remove device with per_io_tasks"
_create_backfile 0 256M
_create_backfile 1 128M
_create_backfile 2 128M
ublk_io_and_remove 8G -t null -q 4 --nthreads 5 --per_io_tasks &
ublk_io_and_remove 256M -t loop -q 4 --nthreads 3 --per_io_tasks \
"${UBLK_BACKFILES[0]}" &
ublk_io_and_remove 256M -t stripe -q 4 --nthreads 4 --per_io_tasks \
"${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" &
wait
_cleanup_test "stress"
_show_result $TID $ERR_CODE