Adding upstream version 1.12.
Signed-off-by: Daniel Baumann <daniel@debian.org>
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42
scripts/gen-hostnqn.sh
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42
scripts/gen-hostnqn.sh
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#!/bin/bash
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LC_ALL=C
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UUID=$(dmidecode -s system-uuid | tr -d '[:space:]')
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if [ -z "$UUID" ] ; then
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>&2 echo "No UUID found, can't determine hostnqn."
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exit 1
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fi
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# convert UUID to lower-case only:
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UUID=$(echo $UUID | tr '[:upper:]' '[:lower:]')
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# check UUID format, e.g.: 4c4c4544-0156-4a10-8134-b7d04f383232, so: 8-4-4-4-12
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if ! [[ $UUID =~ ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ ]] ; then
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>&2 echo "UUID has invalid format."
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>&2 echo "Invalid UUID: ${UUID}"
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exit 2
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fi
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# HEURISTIC:
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# (1) if any one given character occurs more than 50% of the time, it is likely
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# that the UUID is fake.
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# (2) if the first or the last group consists of mostly the same character, it
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# is likely that the UUID is fake.
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FIRST_GROUP="$(echo $UUID | cut -d'-' -f1)"
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LAST_GROUP="$(echo $UUID | cut -d'-' -f5)"
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for i in {{0..9},{a..f}} ; do
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COUNT_TOTAL="${UUID//[^$i]}"
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COUNT_FIRST="${FIRST_GROUP//[^$i]}"
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COUNT_LAST="${LAST_GROUP//[^$i]}"
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if [ ${#COUNT_TOTAL} -ge 16 ] || [ ${#COUNT_FIRST} -ge 7 ] || [ ${#COUNT_LAST} -ge 11 ] ; then
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>&2 echo "UUID is too repetitive. This may be a false alert."
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>&2 echo "Repetitive UUID: ${UUID}"
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exit 3
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fi
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done
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HOSTNQN="nqn.2014-08.org.nvmexpress:uuid:${UUID}"
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echo $HOSTNQN
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114
scripts/latency
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114
scripts/latency
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#!/bin/bash
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#
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# Copyright 2015 PMC-Sierra, Inc.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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# Author: Stephen Bates <stephen.bates@pmcs.com>
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#
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# Description:
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# A shell script that calls the NVMe CLI multiple times to gather
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# latency data. Consider this a poor man's iometer or fio for QD=1
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# analysis. Of course this is below the file-system and block
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# layer so is a best case measurement.
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#
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DEVICE=
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WRITE=false
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COUNT=10
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DATA_SIZE=4096
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METADATA_SIZE=64
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RAND_BASE=temp.rand
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RAND_WFILE=${RAND_BASE}.write
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RAND_RFILE=${RAND_BASE}.read
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OUTPUT=latency.dat
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green=$(tput bold)$(tput setaf 2)
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red=$(tput bold)$(tput setaf 1)
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rst=$(tput sgr0)
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while getopts ":d:n:w" opt; do
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case $opt in
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d)
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DEVICE=${OPTARG}
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;;
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n)
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COUNT=${OPTARG}
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;;
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w)
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echo "WARNING: Write mode enabled, this might trash your drive!"
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WRITE=true
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;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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exit 1
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;;
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:)
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echo "Option -$OPTARG requires an argument." >&2
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exit 1
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;;
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esac
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done
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if [ "$COUNT" == "0" ]; then
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echo "Count can not be 0"
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exit 1
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fi
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if [ -z "$DEVICE" ]; then
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echo "regress: You must specify a NVMe device using -d"
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exit 1
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fi
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function run_test {
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$* | grep -i latency >> ${OUTPUT} 2>&1
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if (( $? )); then
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echo ${red}"FAILED!"${rst}
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echo "Failed running command: "
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echo " $*"
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exit 1
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fi
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}
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rm -f ${OUTPUT} > /dev/null || exit -1
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make clean > /dev/null || exit -1
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make install > /dev/null || exit -1
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for i in `seq 1 ${COUNT}`;
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do
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if $WRITE ; then
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dd if=/dev/urandom of=${RAND_WFILE} bs=${DATA_SIZE} count=1
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run_test nvme write ${DEVICE} --start-block=0 --block-count=0 \
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--metadata-size=${METADATA_SIZE} --data-size=${DATA_SIZE} \
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--data ${RAND_WFILE} --latency
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rm ${RAND_WFILE} > /dev/null
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else
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run_test nvme read ${DEVICE} --start-block=0 --block-count=0 \
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--metadata-size=${METADATA_SIZE} --data-size=${DATA_SIZE} \
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--data ${RAND_RFILE} --latency
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rm ${RAND_RFILE} > /dev/null
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fi
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done
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# Calculate average latency
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SUM=0
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for i in `cat ${OUTPUT} | awk '{print $3}' | xargs`
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do
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SUM=$(($SUM + $i))
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done
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AVERAGE=$(echo "scale=2; $SUM/$COUNT" | bc -l)
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echo "Average Latency: $AVERAGE us"
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