18c778614SMing Lei#!/bin/bash 28c778614SMing Lei# SPDX-License-Identifier: GPL-2.0 38c778614SMing Lei 48c778614SMing Lei. "$(cd "$(dirname "$0")" && pwd)"/test_common.sh 58c778614SMing Lei 68c778614SMing LeiERR_CODE=0 78c778614SMing Lei 88c778614SMing Leiif ! _have_program bpftrace; then 98c778614SMing Lei exit "$UBLK_SKIP_CODE" 108c778614SMing Leifi 118c778614SMing Lei 12a3835a44SUday Shankarif ! _have_program fio; then 13a3835a44SUday Shankar exit "$UBLK_SKIP_CODE" 14a3835a44SUday Shankarfi 15a3835a44SUday Shankar 165314d25aSMing Lei_prep_test "null" "ublk dispatch won't reorder IO for MQ" 178c778614SMing Lei 188c778614SMing Leidev_id=$(_add_ublk_dev -t null -q 2) 198c778614SMing Lei_check_add_dev $TID $? 208c778614SMing Lei 218c778614SMing Leidev_t=$(_get_disk_dev_t "$dev_id") 228c778614SMing Leibpftrace trace/seq_io.bt "$dev_t" "W" 1 > "$UBLK_TMP" 2>&1 & 238c778614SMing Leibtrace_pid=$! 248c778614SMing Lei 255314d25aSMing Lei# Wait for bpftrace probes to be attached (BEGIN block prints BPFTRACE_READY) 265314d25aSMing Leifor _ in $(seq 100); do 275314d25aSMing Lei grep -q "BPFTRACE_READY" "$UBLK_TMP" 2>/dev/null && break 285314d25aSMing Lei sleep 0.1 295314d25aSMing Leidone 305314d25aSMing Lei 315314d25aSMing Leiif ! kill -0 "$btrace_pid" 2>/dev/null; then 32*eac857a1SCaleb Sander Mateos _cleanup_test 338c778614SMing Lei exit "$UBLK_SKIP_CODE" 348c778614SMing Leifi 358c778614SMing Lei 365314d25aSMing Lei# run fio over this ublk disk (pinned to CPU 0) 375314d25aSMing Leitaskset -c 0 fio --name=write_seq \ 388c778614SMing Lei --filename=/dev/ublkb"${dev_id}" \ 398c778614SMing Lei --ioengine=libaio --iodepth=16 \ 408c778614SMing Lei --rw=write \ 418c778614SMing Lei --size=512M \ 428c778614SMing Lei --direct=1 \ 438c778614SMing Lei --bs=4k > /dev/null 2>&1 448c778614SMing LeiERR_CODE=$? 458c778614SMing Leikill "$btrace_pid" 468c778614SMing Leiwait 475314d25aSMing Lei 485314d25aSMing Lei# Check for out-of-order completions detected by bpftrace 495314d25aSMing Leiif grep -q "^out_of_order:" "$UBLK_TMP"; then 505314d25aSMing Lei echo "I/O reordering detected:" 515314d25aSMing Lei grep "^out_of_order:" "$UBLK_TMP" 528c778614SMing Lei ERR_CODE=255 538c778614SMing Leifi 54*eac857a1SCaleb Sander Mateos_cleanup_test 558c778614SMing Lei_show_result $TID $ERR_CODE 56