# CHOOSE EITHER scsidevs or rawdevs
# the SCSI devices to measure - WARNING: will be erased.
-#scsidevs="/dev/sde /dev/sdh"
# The raw devices to use
-#rawdevs="/dev/raw/raw1"
-#scsidevs=`ls /dev/sd[a-z] /dev/sd[a-z][a-z]` # all devices, if you use udev
+# rawdevs=${rawdevs:-"/dev/raw/raw1"}
+# scsidevs=`ls /dev/sd[a-z] /dev/sd[a-z][a-z]` # all devices, if you use udev
# result file prefix. date/time+hostname makes unique
# NB ensure the path exists if it includes subdirs
rslt=${rslt:-"/tmp/sgpdd_survey_`date +%F@%R`_`uname -n`"}
# what to do (read or write)
-actions="write read"
+actions=${actions:-"write read"}
# total size per device (MBytes)
# NB bigger than device cache is good
-size=8192
+size=${size:-8192}
# record size (KBytes)
-rszlo=1024
-rszhi=1024
+rszlo=${rszlo:-1024}
+rszhi=${rszhi:-1024}
# Concurrent regions per device
crglo=${crglo:-1}
crghi=${crghi:-256}
# threads to share between concurrent regions per device
+# multiple threads per region simulates a deeper request queue
# NB survey skips over #thr < #regions and #thr/#regions > SG_MAX_QUEUE
thrlo=${thrlo:-1}
thrhi=${thrhi:-4096}
# map given device names into SG device names
i=0
devs=()
-if [ $scsidevs ]; then
+if [ "$scsidevs" ]; then
# we will test for a LUN, the test for a partition
# if the partition number is > 9 this will fail
for d in $scsidevs; do
fi
i=$((i+1))
done
-elif [ $rawdevs ]; then
+elif [ "$rawdevs" ]; then
for r in $rawdevs; do
RES=`raw -q $r`
if [ $? -eq 0 ];then
echo $minusn "$*"
}
+print_summary "$(date) sgpdd-survey on $rawdevs$scsidevs from $(hostname)"
+
for ((rsz=$rszlo;rsz<=$rszhi;rsz*=2)); do
for ((crg=$crglo;crg<=$crghi;crg*=2)); do
for ((thr=$thrlo;thr<=$thrhi;thr*=2)); do