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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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5
tools/testing/selftests/ublk/test_common.sh
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@@ -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