From 9a4a87b5738969377ccc61af0d88b46c82f240f9 Mon Sep 17 00:00:00 2001
From: Maciej Wawryk <maciejx.wawryk@intel.com>
Date: Tue, 5 Nov 2019 10:28:35 +0100
Subject: [PATCH] test: Shellcheck - correct rule: $/${} is unnecessary on
 arithmetic variables.

Correct shellcheck rule SC2004: $/${} is unnecessary on arithmetic variables.

Signed-off-by: Maciej Wawryk <maciejx.wawryk@intel.com>
Change-Id: Ibf2879360bc50cc058b0f4434a5777c53c0eeffb
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/473265
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
---
 scripts/check_format.sh                       |  2 +-
 scripts/prep_benchmarks.sh                    |  2 +-
 scripts/setup.sh                              |  4 +--
 test/ftl/common.sh                            |  4 +--
 test/ftl/dirty_shutdown.sh                    |  4 +--
 test/ftl/restore.sh                           |  2 +-
 test/iscsi_tgt/common.sh                      |  6 ++--
 test/iscsi_tgt/lvol/iscsi_lvol.sh             |  2 +-
 .../multiconnection/multiconnection.sh        |  2 +-
 test/iscsi_tgt/perf/iscsi_target.sh           |  2 +-
 test/iscsi_tgt/qos/qos.sh                     | 20 +++++------
 test/iscsi_tgt/trace_record/trace_record.sh   |  2 +-
 test/json_config/json_config.sh               |  2 +-
 test/nvme/hw_hotplug.sh                       |  2 +-
 test/nvme/perf/common.sh                      | 36 +++++++++----------
 test/nvme/perf/run_perf.sh                    | 24 ++++++-------
 test/nvmf/common.sh                           |  4 +--
 test/vhost/common.sh                          |  2 +-
 test/vhost/lvol/lvol_test.sh                  | 12 +++----
 test/vhost/perf_bench/vhost_perf.sh           | 14 ++++----
 20 files changed, 74 insertions(+), 74 deletions(-)

diff --git a/scripts/check_format.sh b/scripts/check_format.sh
index 95bb6f9e3..55de05f36 100755
--- a/scripts/check_format.sh
+++ b/scripts/check_format.sh
@@ -240,7 +240,7 @@ if hash shellcheck 2>/dev/null; then
 	# go to: https://trello.com/c/29Z90j1W
 	# Error descriptions can also be found at: https://github.com/koalaman/shellcheck/wiki
 	# This SHCK_EXCLUDE list is out "to do" and we work to fix all of this errors.
-	SHCK_EXCLUDE="SC1083,SC2002,SC2004,\
+	SHCK_EXCLUDE="SC1083,SC2002,\
 SC2010,SC2012,SC2016,SC2034,SC2045,SC2046,SC2068,SC2086,SC2089,SC2090,\
 SC2097,SC2098,SC2119,SC2120,SC2121,SC2124,SC2126,SC2128,\
 SC2129,SC2140,SC2142,SC2143,SC2154,SC2155,SC2162"
diff --git a/scripts/prep_benchmarks.sh b/scripts/prep_benchmarks.sh
index 1bb91385e..2b0642b07 100755
--- a/scripts/prep_benchmarks.sh
+++ b/scripts/prep_benchmarks.sh
@@ -20,7 +20,7 @@ function configure_performance() {
 	echo -n "Moving all interrupts off of core 0..."
 	count=$(($(nproc) / 4))
 	cpumask="e"
-	for ((i=1; i<$count; i++)); do
+	for ((i=1; i<count; i++)); do
 		if [ $((i % 8)) -eq 0 ]; then
 			cpumask=",$cpumask"
 		fi
diff --git a/scripts/setup.sh b/scripts/setup.sh
index f8619163b..0bfd57beb 100755
--- a/scripts/setup.sh
+++ b/scripts/setup.sh
@@ -388,7 +388,7 @@ function configure_linux {
 
 		MEMLOCK_AMNT=$(ulimit -l)
 		if [ "$MEMLOCK_AMNT" != "unlimited" ] ; then
-			MEMLOCK_MB=$(( $MEMLOCK_AMNT / 1024 ))
+			MEMLOCK_MB=$(( MEMLOCK_AMNT / 1024 ))
 			echo ""
 			echo "Current user memlock limit: ${MEMLOCK_MB} MB"
 			echo ""
@@ -709,7 +709,7 @@ fi
 
 if [ $(uname) = Linux ]; then
 	HUGEPGSZ=$(( $(grep Hugepagesize /proc/meminfo | cut -d : -f 2 | tr -dc '0-9') ))
-	HUGEPGSZ_MB=$(( $HUGEPGSZ / 1024 ))
+	HUGEPGSZ_MB=$(( HUGEPGSZ / 1024 ))
 	: ${NRHUGE=$(( (HUGEMEM + HUGEPGSZ_MB - 1) / HUGEPGSZ_MB ))}
 
 	if [ "$mode" == "config" ]; then
diff --git a/test/ftl/common.sh b/test/ftl/common.sh
index cea25a154..9f3cffab4 100644
--- a/test/ftl/common.sh
+++ b/test/ftl/common.sh
@@ -25,9 +25,9 @@ function create_nv_cache_bdev() {
 	local chunk_size=$(get_chunk_size $ocssd_bdf)
 
 	# We need at least 2 bands worth of data + 1 block
-	local size=$((2 * 4096 * $chunk_size * $num_punits + 1))
+	local size=$((2 * 4096 * chunk_size * num_punits + 1))
 	# Round the size up to the nearest megabyte
-	local size=$((($size + $bytes_to_mb) / $bytes_to_mb))
+	local size=$(((size + bytes_to_mb) / bytes_to_mb))
 
 	# Create NVMe bdev on specified device and split it so that it has the desired size
 	local nvc_bdev=$($rootdir/scripts/rpc.py bdev_nvme_attach_controller -b $name -t PCIe -a $cache_bdf)
diff --git a/test/ftl/dirty_shutdown.sh b/test/ftl/dirty_shutdown.sh
index a43f727dd..17f7a80f5 100755
--- a/test/ftl/dirty_shutdown.sh
+++ b/test/ftl/dirty_shutdown.sh
@@ -33,10 +33,10 @@ restore_kill() {
 trap "restore_kill; exit 1" SIGINT SIGTERM EXIT
 
 chunk_size=$(get_chunk_size $device)
-pu_count=$(($pu_end - $pu_start + 1))
+pu_count=$((pu_end - pu_start + 1))
 
 # Write one band worth of data + one extra chunk
-data_size=$(($chunk_size * ($pu_count + 1)))
+data_size=$((chunk_size * (pu_count + 1)))
 
 $rootdir/app/spdk_tgt/spdk_tgt & svcpid=$!
 waitforlisten $svcpid
diff --git a/test/ftl/restore.sh b/test/ftl/restore.sh
index fe64650c7..5661afc51 100755
--- a/test/ftl/restore.sh
+++ b/test/ftl/restore.sh
@@ -42,7 +42,7 @@ $rootdir/app/spdk_tgt/spdk_tgt & svcpid=$!
 waitforlisten $svcpid
 
 if [ -n "$nv_cache" ]; then
-	nvc_bdev=$(create_nv_cache_bdev nvc0 $device $nv_cache $(($pu_end - $pu_start + 1)))
+	nvc_bdev=$(create_nv_cache_bdev nvc0 $device $nv_cache $((pu_end - pu_start + 1)))
 fi
 
 ftl_construct_args="bdev_ftl_create -b nvme0 -a $device -l ${pu_start}-${pu_end}"
diff --git a/test/iscsi_tgt/common.sh b/test/iscsi_tgt/common.sh
index e57b211f3..f7e6f3aa6 100644
--- a/test/iscsi_tgt/common.sh
+++ b/test/iscsi_tgt/common.sh
@@ -150,7 +150,7 @@ function start_vpp() {
 	counter=40
 	while [ $counter -gt 0 ] ; do
 		vppctl show version &> /dev/null && break
-		counter=$(( $counter - 1 ))
+		counter=$(( counter - 1 ))
 		sleep 0.5
 	done
 	xtrace_restore
@@ -178,8 +178,8 @@ function start_vpp() {
 	sleep 3
 	# SC1010: ping -M do - in this case do is an option not bash special word
 	# shellcheck disable=SC1010
-	ping -c 1 $TARGET_IP -s $(( $MTU - 28 )) -M do
-	vppctl ping $INITIATOR_IP repeat 1 size $(( $MTU - (28 + 8) )) verbose
+	ping -c 1 $TARGET_IP -s $(( MTU - 28 )) -M do
+	vppctl ping $INITIATOR_IP repeat 1 size $(( MTU - (28 + 8) )) verbose
 }
 
 function kill_vpp() {
diff --git a/test/iscsi_tgt/lvol/iscsi_lvol.sh b/test/iscsi_tgt/lvol/iscsi_lvol.sh
index fcf36c1ff..a54c40755 100755
--- a/test/iscsi_tgt/lvol/iscsi_lvol.sh
+++ b/test/iscsi_tgt/lvol/iscsi_lvol.sh
@@ -71,7 +71,7 @@ sleep 1
 timing_enter discovery
 iscsiadm -m discovery -t sendtargets -p $TARGET_IP:$ISCSI_PORT
 iscsiadm -m node --login -p $TARGET_IP:$ISCSI_PORT
-waitforiscsidevices $(( $NUM_LVS * $NUM_LVOL ))
+waitforiscsidevices $(( NUM_LVS * NUM_LVOL ))
 timing_exit discovery
 
 timing_enter fio
diff --git a/test/iscsi_tgt/multiconnection/multiconnection.sh b/test/iscsi_tgt/multiconnection/multiconnection.sh
index 1fccbd0ca..0eb09b651 100755
--- a/test/iscsi_tgt/multiconnection/multiconnection.sh
+++ b/test/iscsi_tgt/multiconnection/multiconnection.sh
@@ -56,7 +56,7 @@ ls_guid=$($rpc_py bdev_lvol_create_lvstore "Nvme0n1" "lvs0" -c 1048576)
 
 # Assign even size for each lvol_bdev.
 get_lvs_free_mb $ls_guid
-lvol_bdev_size=$(($free_mb / $CONNECTION_NUMBER))
+lvol_bdev_size=$((free_mb / CONNECTION_NUMBER))
 for i in $(seq 1 $CONNECTION_NUMBER); do
 	$rpc_py bdev_lvol_create -u $ls_guid lbd_$i $lvol_bdev_size
 done
diff --git a/test/iscsi_tgt/perf/iscsi_target.sh b/test/iscsi_tgt/perf/iscsi_target.sh
index 69158d3ac..4c122f96d 100755
--- a/test/iscsi_tgt/perf/iscsi_target.sh
+++ b/test/iscsi_tgt/perf/iscsi_target.sh
@@ -100,7 +100,7 @@ fi
 $rpc_py iscsi_create_portal_group $PORTAL_TAG $TARGET_IP:$ISCSI_PORT
 $rpc_py iscsi_create_initiator_group $INITIATOR_TAG $INITIATOR_NAME $NETMASK
 
-for (( i=0; i < $DISKNO; i++ ))
+for (( i=0; i < DISKNO; i++ ))
 do
 	$rpc_py iscsi_create_target_node Target${i} Target${i}_alias "${bdevs[i]}:0" "$PORTAL_TAG:$INITIATOR_TAG" 64 -d
 done
diff --git a/test/iscsi_tgt/qos/qos.sh b/test/iscsi_tgt/qos/qos.sh
index 6da04cb9e..fd5a24bb0 100755
--- a/test/iscsi_tgt/qos/qos.sh
+++ b/test/iscsi_tgt/qos/qos.sh
@@ -23,8 +23,8 @@ function run_fio() {
 	local end_io_count=$(jq -r '.bdevs[0].num_read_ops' <<< "$iostats")
 	local end_bytes_read=$(jq -r '.bdevs[0].bytes_read' <<< "$iostats")
 
-	IOPS_RESULT=$(((end_io_count-start_io_count)/$run_time))
-	BANDWIDTH_RESULT=$(((end_bytes_read-start_bytes_read)/$run_time))
+	IOPS_RESULT=$(((end_io_count-start_io_count)/run_time))
+	BANDWIDTH_RESULT=$(((end_bytes_read-start_bytes_read)/run_time))
 }
 
 function verify_qos_limits() {
@@ -84,19 +84,19 @@ trap 'iscsicleanup; killprocess $pid; iscsitestfini $1 $2; exit 1' SIGINT SIGTER
 run_fio Malloc0
 
 # Set IOPS/bandwidth limit to 50% of the actual unrestrained performance.
-IOPS_LIMIT=$(($IOPS_RESULT/2))
-BANDWIDTH_LIMIT=$(($BANDWIDTH_RESULT/2))
+IOPS_LIMIT=$((IOPS_RESULT/2))
+BANDWIDTH_LIMIT=$((BANDWIDTH_RESULT/2))
 # Set READ bandwidth limit to 50% of the RW bandwidth limit to be able
 # to differentiate those two.
-READ_BANDWIDTH_LIMIT=$(($BANDWIDTH_LIMIT/2))
+READ_BANDWIDTH_LIMIT=$((BANDWIDTH_LIMIT/2))
 
 # Also round them down to nearest multiple of either 1000 IOPS or 1MB BW
 # which are the minimal QoS granularities
-IOPS_LIMIT=$(($IOPS_LIMIT/1000*1000))
-BANDWIDTH_LIMIT_MB=$(($BANDWIDTH_LIMIT/1024/1024))
-BANDWIDTH_LIMIT=$(($BANDWIDTH_LIMIT_MB*1024*1024))
-READ_BANDWIDTH_LIMIT_MB=$(($READ_BANDWIDTH_LIMIT/1024/1024))
-READ_BANDWIDTH_LIMIT=$(($READ_BANDWIDTH_LIMIT_MB*1024*1024))
+IOPS_LIMIT=$((IOPS_LIMIT/1000*1000))
+BANDWIDTH_LIMIT_MB=$((BANDWIDTH_LIMIT/1024/1024))
+BANDWIDTH_LIMIT=$((BANDWIDTH_LIMIT_MB*1024*1024))
+READ_BANDWIDTH_LIMIT_MB=$((READ_BANDWIDTH_LIMIT/1024/1024))
+READ_BANDWIDTH_LIMIT=$((READ_BANDWIDTH_LIMIT_MB*1024*1024))
 
 # Limit the I/O rate by RPC, then confirm the observed rate matches.
 $rpc_py bdev_set_qos_limit Malloc0 --rw_ios_per_sec $IOPS_LIMIT
diff --git a/test/iscsi_tgt/trace_record/trace_record.sh b/test/iscsi_tgt/trace_record/trace_record.sh
index 5e6f231db..75dd19d97 100755
--- a/test/iscsi_tgt/trace_record/trace_record.sh
+++ b/test/iscsi_tgt/trace_record/trace_record.sh
@@ -73,7 +73,7 @@ sleep 1
 
 iscsiadm -m discovery -t sendtargets -p $TARGET_IP:$ISCSI_PORT
 iscsiadm -m node --login -p $TARGET_IP:$ISCSI_PORT
-waitforiscsidevices $(( $CONNECTION_NUMBER + 1 ))
+waitforiscsidevices $(( CONNECTION_NUMBER + 1 ))
 
 trap 'iscsicleanup; killprocess $iscsi_pid; killprocess $record_pid; delete_tmp_files; iscsitestfini $1 $2; exit 1' SIGINT SIGTERM EXIT
 
diff --git a/test/json_config/json_config.sh b/test/json_config/json_config.sh
index 6c12cd57c..29881adb1 100755
--- a/test/json_config/json_config.sh
+++ b/test/json_config/json_config.sh
@@ -415,7 +415,7 @@ function json_config_clear() {
 	count=100
 	while [ $count -gt 0 ] ; do
 		$rootdir/scripts/rpc.py -s "${app_socket[$1]}" save_config | $config_filter -method delete_global_parameters | $config_filter -method check_empty && break
-		count=$(( $count -1 ))
+		count=$(( count -1 ))
 		sleep 0.1
 	done
 
diff --git a/test/nvme/hw_hotplug.sh b/test/nvme/hw_hotplug.sh
index 6b99fa2e3..276e61ad4 100755
--- a/test/nvme/hw_hotplug.sh
+++ b/test/nvme/hw_hotplug.sh
@@ -50,7 +50,7 @@ trap 'killprocess $example_pid; exit 1' SIGINT SIGTERM EXIT
 i=0
 while ! grep "Starting I/O" log.txt; do
 	[ $i -lt 20 ] || break
-	i=$(($i+1))
+	i=$((i+1))
 	sleep 1
 done
 
diff --git a/test/nvme/perf/common.sh b/test/nvme/perf/common.sh
index 7dd102557..bf72b289f 100755
--- a/test/nvme/perf/common.sh
+++ b/test/nvme/perf/common.sh
@@ -107,7 +107,7 @@ function get_disks_on_numa(){
 	for (( i=0; i<${#devs[@]}; i++ ))
 	do
 		if [ ${numas[$i]} = $numa_no ]; then
-			disks_on_numa=$(($disks_on_numa+1))
+			disks_on_numa=$((disks_on_numa+1))
 		fi
 	done
 	echo $disks_on_numa
@@ -124,18 +124,18 @@ function create_fio_config(){
 	local filename=""
 
 	local cores_numa=($(get_cores_numa_node "$5"))
-	local disks_per_core=$(($disk_no/$no_cores))
-	local disks_per_core_mod=$(($disk_no%$no_cores))
+	local disks_per_core=$((disk_no/no_cores))
+	local disks_per_core_mod=$((disk_no%no_cores))
 
 	# For kernel dirver, each disk will be alligned with all cpus on the same NUMA node
 	if [ "$plugin" != "nvme" ] && [ "$plugin" != "bdev" ]; then
-		for (( i=0; i<$disk_no; i++ ))
+		for (( i=0; i<disk_no; i++ ))
 		do
 			sed -i -e "\$a[filename${i}]" $BASE_DIR/config.fio
 			filename="/dev/${disks[$i]}"
 			sed -i -e "\$afilename=$filename" $BASE_DIR/config.fio
 			cpu_used=""
-				for (( j=0; j<$no_cores; j++ ))
+				for (( j=0; j<no_cores; j++ ))
 				do
 					core_numa=${cores_numa[$j]}
 					if [ "${disks_numa[$i]}" = "$core_numa" ]; then
@@ -146,13 +146,13 @@ function create_fio_config(){
 				echo "" >> $BASE_DIR/config.fio
 		done
 	else
-		for (( i=0; i<$no_cores; i++ ))
+		for (( i=0; i<no_cores; i++ ))
 		do
 			core_numa=${cores_numa[$i]}
 			total_disks_per_core=$disks_per_core
 			if [ "$disks_per_core_mod" -gt "0" ]; then
-				total_disks_per_core=$(($disks_per_core+1))
-				disks_per_core_mod=$(($disks_per_core_mod-1))
+				total_disks_per_core=$((disks_per_core+1))
+				disks_per_core_mod=$((disks_per_core_mod-1))
 			fi
 
 			if [ "$total_disks_per_core" = "0" ]; then
@@ -166,7 +166,7 @@ function create_fio_config(){
 			n=0 #counter of all disks
 			while [ "$m" -lt  "$total_disks_per_core" ]; do
 				if [ ${disks_numa[$n]} = $core_numa ]; then
-					m=$(($m+1))
+					m=$((m+1))
 					if [ "$plugin" = "nvme" ]; then
 						filename='trtype=PCIe traddr='${disks[$n]//:/.}' ns=1'
 					elif [ "$plugin" = "bdev" ]; then
@@ -176,7 +176,7 @@ function create_fio_config(){
 					#Mark numa of n'th disk as "x" to mark it as claimed
 					disks_numa[$n]="x"
 				fi
-				n=$(($n+1))
+				n=$((n+1))
 				# If there is no more disks with numa node same as cpu numa node, switch to other numa node.
 				if [ $n -ge $total_disks ]; then
 					if [ "$core_numa" = "1" ]; then
@@ -225,37 +225,37 @@ function get_results(){
 		mean_lat_usec)
 		mean_lat=$(cat $NVME_FIO_RESULTS | jq -r ".jobs[] | (.read.lat_ns.mean * $reads_pct + .write.lat_ns.mean * $writes_pct)")
 		mean_lat=${mean_lat%.*}
-		echo $(( $mean_lat/100000 ))
+		echo $(( mean_lat/100000 ))
 		;;
 		p99_lat_usec)
 		p99_lat=$(cat $NVME_FIO_RESULTS | jq -r ".jobs[] | (.read.clat_ns.percentile.\"99.000000\" * $reads_pct + .write.clat_ns.percentile.\"99.000000\" * $writes_pct)")
 		p99_lat=${p99_lat%.*}
-		echo $(( $p99_lat/100000 ))
+		echo $(( p99_lat/100000 ))
 		;;
 		p99_99_lat_usec)
 		p99_99_lat=$(cat $NVME_FIO_RESULTS | jq -r ".jobs[] | (.read.clat_ns.percentile.\"99.990000\" * $reads_pct + .write.clat_ns.percentile.\"99.990000\" * $writes_pct)")
 		p99_99_lat=${p99_99_lat%.*}
-		echo $(( $p99_99_lat/100000 ))
+		echo $(( p99_99_lat/100000 ))
 		;;
 		stdev_usec)
 		stdev=$(cat $NVME_FIO_RESULTS | jq -r ".jobs[] | (.read.clat_ns.stddev * $reads_pct + .write.clat_ns.stddev * $writes_pct)")
 		stdev=${stdev%.*}
-		echo $(( $stdev/100000 ))
+		echo $(( stdev/100000 ))
 		;;
 		mean_slat_usec)
 		mean_slat=$(cat $NVME_FIO_RESULTS | jq -r ".jobs[] | (.read.slat_ns.mean * $reads_pct + .write.slat_ns.mean * $writes_pct)")
 		mean_slat=${mean_slat%.*}
-		echo $(( $mean_slat/100000 ))
+		echo $(( mean_slat/100000 ))
 		;;
 		mean_clat_usec)
 		mean_clat=$(cat $NVME_FIO_RESULTS | jq -r ".jobs[] | (.read.clat_ns.mean * $reads_pct + .write.clat_ns.mean * $writes_pct)")
 		mean_clat=${mean_clat%.*}
-		echo $(( $mean_clat/100000 ))
+		echo $(( mean_clat/100000 ))
 		;;
 		bw_Kibs)
 		bw=$(cat $NVME_FIO_RESULTS | jq -r ".jobs[] | (.read.bw + .write.bw)")
 		bw=${bw%.*}
-		echo $(( $bw ))
+		echo $(( bw ))
 		;;
 	esac
 }
@@ -270,7 +270,7 @@ function get_bdevperf_results(){
 		bw_Kibs)
 		bw_MBs=$(grep Total $NVME_FIO_RESULTS | awk -F 'Total' '{print $2}' | awk '{print $4}')
 		bw_MBs=${bw_MBs%.*}
-		echo $(( $bw_MBs * 1024 ))
+		echo $(( bw_MBs * 1024 ))
 		;;
 	esac
 }
diff --git a/test/nvme/perf/run_perf.sh b/test/nvme/perf/run_perf.sh
index 655b7f33f..85fadd994 100755
--- a/test/nvme/perf/run_perf.sh
+++ b/test/nvme/perf/run_perf.sh
@@ -103,17 +103,17 @@ echo "run-time,ramp-time,fio-plugin,QD,block-size,num-cpu-cores,workload,workloa
 printf "%s,%s,%s,%s,%s,%s,%s,%s\n" $RUNTIME $RAMP_TIME $PLUGIN $IODEPTH $BLK_SIZE $no_cores $RW $MIX >> $result_file
 echo "num_of_disks,iops,avg_lat[usec],p99[usec],p99.99[usec],stdev[usec],avg_slat[usec],avg_clat[usec],bw[Kib/s]" >> $result_file
 #Run each workolad $REPEAT_NO times
-for (( j=0; j < $REPEAT_NO; j++ ))
+for (( j=0; j < REPEAT_NO; j++ ))
 do
 	#Start with $DISKNO disks and remove 2 disks for each run to avoid preconditioning before each run.
-	for (( k=$DISKNO; k >= 1; k-=2 ))
+	for (( k=DISKNO; k >= 1; k-=2 ))
 	do
 		cp $BASE_DIR/config.fio.tmp $BASE_DIR/config.fio
 		echo "" >> $BASE_DIR/config.fio
 		#The SPDK fio plugin supports submitting/completing I/Os to multiple SSDs from a single thread.
 		#Therefore, the per thread queue depth is set to the desired IODEPTH/device X the number of devices per thread.
 		if [ "$PLUGIN" = "nvme" ] || [ "$PLUGIN" = "bdev" ] && [ "$NOIOSCALING" = false ]; then
-			qd=$(( $IODEPTH * $k ))
+			qd=$(( IODEPTH * k ))
 		else
 			qd=$IODEPTH
 		fi
@@ -161,17 +161,17 @@ do
 	done
 done
 #Write results to csv file
-for (( k=$DISKNO; k >= 1; k-=2 ))
+for (( k=DISKNO; k >= 1; k-=2 ))
 do
-	iops_disks[$k]=$((${iops_disks[$k]} / $REPEAT_NO))
+	iops_disks[$k]=$((${iops_disks[$k]} / REPEAT_NO))
 
 	if [ $PLUGIN != "bdevperf" ]; then
-		mean_lat_disks_usec[$k]=$((${mean_lat_disks_usec[$k]} / $REPEAT_NO))
-		p99_lat_disks_usec[$k]=$((${p99_lat_disks_usec[$k]} / $REPEAT_NO))
-		p99_99_lat_disks_usec[$k]=$((${p99_99_lat_disks_usec[$k]} / $REPEAT_NO))
-		stdev_disks_usec[$k]=$((${stdev_disks_usec[$k]} / $REPEAT_NO))
-		mean_slat_disks_usec[$k]=$((${mean_slat_disks_usec[$k]} / $REPEAT_NO))
-		mean_clat_disks_usec[$k]=$((${mean_clat_disks_usec[$k]} / $REPEAT_NO))
+		mean_lat_disks_usec[$k]=$((${mean_lat_disks_usec[$k]} / REPEAT_NO))
+		p99_lat_disks_usec[$k]=$((${p99_lat_disks_usec[$k]} / REPEAT_NO))
+		p99_99_lat_disks_usec[$k]=$((${p99_99_lat_disks_usec[$k]} / REPEAT_NO))
+		stdev_disks_usec[$k]=$((${stdev_disks_usec[$k]} / REPEAT_NO))
+		mean_slat_disks_usec[$k]=$((${mean_slat_disks_usec[$k]} / REPEAT_NO))
+		mean_clat_disks_usec[$k]=$((${mean_clat_disks_usec[$k]} / REPEAT_NO))
 	else
 		mean_lat_disks_usec[$k]=0
 		p99_lat_disks_usec[$k]=0
@@ -181,7 +181,7 @@ do
 		mean_clat_disks_usec[$k]=0
 	fi
 
-	bw[$k]=$((${bw[$k]} / $REPEAT_NO))
+	bw[$k]=$((${bw[$k]} / REPEAT_NO))
 
 	printf "%s,%s,%s,%s,%s,%s,%s,%s,%s\n" ${k} ${iops_disks[$k]} ${mean_lat_disks_usec[$k]} ${p99_lat_disks_usec[$k]}\
 	${p99_99_lat_disks_usec[$k]} ${stdev_disks_usec[$k]} ${mean_slat_disks_usec[$k]} ${mean_clat_disks_usec[$k]} ${bw[$k]} >> $result_file
diff --git a/test/nvmf/common.sh b/test/nvmf/common.sh
index 19079cd2b..49a09d180 100644
--- a/test/nvmf/common.sh
+++ b/test/nvmf/common.sh
@@ -109,13 +109,13 @@ function detect_rdma_nics()
 
 function allocate_nic_ips()
 {
-	(( count=$NVMF_IP_LEAST_ADDR ))
+	(( count=NVMF_IP_LEAST_ADDR ))
 	for nic_name in $(get_rdma_if_list); do
 		ip="$(get_ip_address $nic_name)"
 		if [ -z $ip ]; then
 			ip addr add $NVMF_IP_PREFIX.$count/24 dev $nic_name
 			ip link set $nic_name up
-			(( count=$count+1 ))
+			(( count=count+1 ))
 		fi
 		# dump configuration for debug log
 		ip addr show $nic_name
diff --git a/test/vhost/common.sh b/test/vhost/common.sh
index aa5051ce2..2ba1c1890 100644
--- a/test/vhost/common.sh
+++ b/test/vhost/common.sh
@@ -655,7 +655,7 @@ function vm_setup()
 	for c in $cpu_list; do
 		# if range is detected - count how many cpus
 		if [[ $c =~ [0-9]+-[0-9]+ ]]; then
-			val=$(($c-1))
+			val=$((c-1))
 			val=${val#-}
 		else
 			val=1
diff --git a/test/vhost/lvol/lvol_test.sh b/test/vhost/lvol/lvol_test.sh
index e72fca016..6e69a2044 100755
--- a/test/vhost/lvol/lvol_test.sh
+++ b/test/vhost/lvol/lvol_test.sh
@@ -132,7 +132,7 @@ nest_lvol_bdevs=()
 used_vms=""
 
 # On each NVMe create one lvol store
-for (( i=0; i<$max_disks; i++ ));do
+for (( i=0; i<max_disks; i++ ));do
 
     # Create base lvol store on NVMe
     notice "Creating lvol store on device Nvme${i}n1"
@@ -150,7 +150,7 @@ for (( i=0; i<$max_disks; i++ ));do
         nest_ls_guid=$($rpc_py bdev_lvol_create_lvstore $lb_name lvs_n_$i -c 4194304)
         nest_lvol_stores+=("$nest_ls_guid")
 
-        for (( j=0; j<$vm_count; j++)); do
+        for (( j=0; j<vm_count; j++)); do
             notice "Creating nested lvol bdev for VM $i on lvol store $nest_ls_guid"
             free_mb=$(get_lvs_free_mb "$nest_ls_guid")
             nest_size=$((free_mb / (vm_count-j) ))
@@ -160,7 +160,7 @@ for (( i=0; i<$max_disks; i++ ));do
     fi
 
     # Create base lvol bdevs
-    for (( j=0; j<$vm_count; j++)); do
+    for (( j=0; j<vm_count; j++)); do
         notice "Creating lvol bdev for VM $i on lvol store $ls_guid"
         free_mb=$(get_lvs_free_mb "$ls_guid")
         size=$((free_mb / (vm_count-j) ))
@@ -175,7 +175,7 @@ $rpc_py bdev_lvol_get_lvstores
 echo "$bdev_info"
 
 # Set up VMs
-for (( i=0; i<$vm_count; i++)); do
+for (( i=0; i<vm_count; i++)); do
     vm="vm_$i"
 
     # Get all lvol bdevs associated with this VM number
@@ -255,7 +255,7 @@ sleep 2
 
 notice "Cleaning up vhost - remove LUNs, controllers, lvol bdevs and lvol stores"
 if [[ "$ctrl_type" == "spdk_vhost_scsi" ]]; then
-    for (( i=0; i<$vm_count; i++)); do
+    for (( i=0; i<vm_count; i++)); do
         notice "Removing devices from vhost SCSI controller naa.0.$i"
         for (( j=0; j<${#bdevs[@]}; j++)); do
             $rpc_py vhost_scsi_controller_remove_target naa.0.$i $j
@@ -265,7 +265,7 @@ if [[ "$ctrl_type" == "spdk_vhost_scsi" ]]; then
         $rpc_py vhost_delete_controller naa.0.$i
     done
 elif [[ "$ctrl_type" == "spdk_vhost_blk" ]]; then
-    for (( i=0; i<$vm_count; i++)); do
+    for (( i=0; i<vm_count; i++)); do
         for (( j=0; j<${#bdevs[@]}; j++)); do
             notice "Removing vhost BLK controller naa.$j.$i"
             $rpc_py vhost_delete_controller naa.$j.$i
diff --git a/test/vhost/perf_bench/vhost_perf.sh b/test/vhost/perf_bench/vhost_perf.sh
index 9335ecc68..c0f1267bb 100755
--- a/test/vhost/perf_bench/vhost_perf.sh
+++ b/test/vhost/perf_bench/vhost_perf.sh
@@ -88,7 +88,7 @@ function cleanup_lvol_cfg()
 function cleanup_split_cfg()
 {
 	notice "Removing split vbdevs"
-	for (( i=0; i<$max_disks; i++ ));do
+	for (( i=0; i<max_disks; i++ ));do
 		$rpc_py bdev_split_delete Nvme${i}n1
 	done
 }
@@ -208,15 +208,15 @@ if [[ "$ctrl_type" == "kernel_vhost" ]]; then
 	trap 'vm_kill_all; sleep 1; cleanup_kernel_vhost; error_exit "${FUNCNAME}" "${LINENO}"' INT ERR
 	# Split disks using parted for kernel vhost
 	newline=$'\n'
-	for (( i=0; i<$max_disks; i++ ));do
+	for (( i=0; i<max_disks; i++ ));do
 		parted -s /dev/nvme${i}n1 mklabel msdos
 		parted -s /dev/nvme${i}n1 mkpart extended 2048s 100%
 		part_size=$((100/${splits[$i]})) # Split 100% of disk into roughly even parts
 		echo "  Creating ${splits[$i]} partitions of relative disk size ${part_size}"
 
 		for p in $(seq 0 $((${splits[$i]} - 1))); do
-			p_start=$(($p*$part_size))
-			p_end=$(($p_start+$part_size))
+			p_start=$((p*part_size))
+			p_end=$((p_start+part_size))
 			parted -s /dev/nvme${i}n1 mkpart logical ${p_start}% ${p_end}%
 		done
 	done
@@ -254,7 +254,7 @@ else
 		notice "Using split vbdevs"
 		trap 'cleanup_split_cfg; error_exit "${FUNCNAME}" "${LINENO}"' INT ERR
 		split_bdevs=()
-		for (( i=0; i<$max_disks; i++ ));do
+		for (( i=0; i<max_disks; i++ ));do
 			out=$($rpc_py bdev_split_create Nvme${i}n1 ${splits[$i]})
 			for s in $(seq 0 $((${splits[$i]}-1))); do
 				split_bdevs+=("Nvme${i}n1p${s}")
@@ -264,7 +264,7 @@ else
 	else
 		notice "Using logical volumes"
 		trap 'cleanup_lvol_cfg; error_exit "${FUNCNAME}" "${LINENO}"' INT ERR
-		for (( i=0; i<$max_disks; i++ ));do
+		for (( i=0; i<max_disks; i++ ));do
 			ls_guid=$($rpc_py bdev_lvol_create_lvstore Nvme${i}n1 lvs_$i --clear-method none)
 			lvol_stores+=("$ls_guid")
 			for (( j=0; j<${splits[$i]}; j++)); do
@@ -279,7 +279,7 @@ else
 fi
 
 # Prepare VMs and controllers
-for (( i=0; i<$vm_count; i++)); do
+for (( i=0; i<vm_count; i++)); do
 	vm="vm_$i"
 
 	setup_cmd="vm_setup --disk-type=$ctrl_type --force=$i --memory=$vm_memory"