Commit 17574aa2 authored by Uday Shankar's avatar Uday Shankar Committed by Jens Axboe
Browse files

selftests: ublk: add stress test for per io daemons 

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: default avatarMing Lei <ming.lei@redhat.com>
Signed-off-by: default avatarUday Shankar <ushankar@purestorage.com>
Link: https://lore.kernel.org/r/20250529-ublk_task_per_io-v8-8-e9d3b119336a@purestorage.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 236918d3

tools/testing/selftests/ublk/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/ublk/test_common.sh

+5 −0
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/ublk/test_stress_06.sh

0 → 100755
+36 −0
Original line number Diff line number Diff line 
#!/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