012

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2018 Western Digital Corporation or its affiliates

. tests/srp/rc

DESCRIPTION="dm-mpath on top of multiple I/O schedulers"
QUICK=1

test_io_schedulers() {
	local dev m dm scheds

	# Load all I/O scheduler kernel modules
	for m in "/lib/modules/$(uname -r)/kernel/block/"*.ko; do
		modprobe "$(basename "$m")" >&/dev/null
	done
	for mq in y n; do
		if [ $mq = n ] && ! _have_legacy_dm; then
			unset SKIP_REASONS
			continue
		fi
		use_blk_mq ${mq} ${mq} || return $?
		dev=$(get_bdev 0) || return $?
		dm=$(basename "$(readlink --canonicalize "${dev}")") || return $?
		scheds="$(_io_schedulers "$dm")" || return $?
		for sched in $scheds; do
			set_scheduler "$dm" "$sched" \
				      >>"$FULL" 2>&1 || continue
			echo "I/O scheduler: $sched; use_blk_mq: $mq" >>"$FULL"
			run_fio --verify=md5 --rw=randwrite --bs=4K --size=64K \
				--ioengine=libaio --iodepth=64 \
				--iodepth_batch=32 --group_reporting --sync=1 \
				--direct=1 --filename="$dev" \
				--name="${sched}" --thread --numjobs=1 \
				--output="${RESULTS_DIR}/srp/012-${sched}-${mq}.txt" \
				>>"$FULL" ||
				return $?
		done
	done
	return 0
}

test() {
	trap 'trap "" EXIT; teardown' EXIT
	setup && test_io_schedulers && echo Passed
}