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3a4d8bed0b
Add automatic TID derivation in test_common.sh based on the script filename. The TID is extracted by stripping the "test_" prefix and ".sh" suffix from the script name (e.g., test_loop_01.sh -> loop_01). This removes the need for each test script to manually define TID, reducing boilerplate and preventing potential mismatches between the script name and TID. Scripts can still override TID after sourcing test_common.sh if needed. Reviewed-by: Caleb Sander Mateos <csander@purestorage.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
59 lines
1.5 KiB
Bash
Executable File
59 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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. "$(cd "$(dirname "$0")" && pwd)"/test_common.sh
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ERR_CODE=0
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if ! _have_program bpftrace; then
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exit "$UBLK_SKIP_CODE"
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fi
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if ! _have_program fio; then
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exit "$UBLK_SKIP_CODE"
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fi
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_prep_test "null" "do imbalanced load, it should be balanced over I/O threads"
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NTHREADS=6
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dev_id=$(_add_ublk_dev -t null -q 4 -d 16 --nthreads $NTHREADS --per_io_tasks)
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_check_add_dev $TID $?
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dev_t=$(_get_disk_dev_t "$dev_id")
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bpftrace trace/count_ios_per_tid.bt "$dev_t" > "$UBLK_TMP" 2>&1 &
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btrace_pid=$!
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sleep 2
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if ! kill -0 "$btrace_pid" > /dev/null 2>&1; then
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_cleanup_test "null"
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exit "$UBLK_SKIP_CODE"
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fi
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# do imbalanced I/O on the ublk device
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# pin to cpu 0 to prevent migration/only target one queue
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fio --name=write_seq \
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--filename=/dev/ublkb"${dev_id}" \
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--ioengine=libaio --iodepth=16 \
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--rw=write \
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--size=512M \
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--direct=1 \
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--bs=4k \
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--cpus_allowed=0 > /dev/null 2>&1
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ERR_CODE=$?
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kill "$btrace_pid"
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wait
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# check that every task handles some I/O, even though all I/O was issued
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# from a single CPU. when ublk gets support for round-robin tag
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# allocation, this check can be strengthened to assert that every thread
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# handles the same number of I/Os
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NR_THREADS_THAT_HANDLED_IO=$(grep -c '@' ${UBLK_TMP})
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if [[ $NR_THREADS_THAT_HANDLED_IO -ne $NTHREADS ]]; then
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echo "only $NR_THREADS_THAT_HANDLED_IO handled I/O! expected $NTHREADS"
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cat "$UBLK_TMP"
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ERR_CODE=255
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fi
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_cleanup_test "null"
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_show_result $TID $ERR_CODE
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