| #!/bin/bash |
| |
| # Each CPU reads every block off a block device...twice. |
| |
| # Copyright (C) 2003-2006 IBM |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation; either version 2 of the |
| # License, or (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, but |
| # WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| # General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write to the Free Software |
| # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| # 02111-1307, USA. |
| |
| |
| BLKDEVS=$(cat /proc/partitions | grep [sh]d.[0-9] | awk '{if ($3 > 10000) print $4}') |
| WORK=$((NR_CPUS * 2)) |
| |
| echo "Running dd's on these devices:" |
| echo "$BLKDEVS" |
| echo "using $WORK dd's per device." |
| |
| # Did we see any failures? |
| LOGFILE=/proc/$$/fd/1 |
| OLD_ERRORS=`egrep -ic "(error|fail|invalid|denied|cannot)" $LOGFILE` |
| |
| for ((k=1; k < $WORK; k++)) |
| do |
| for i in $BLKDEVS |
| do |
| dd if=/dev/$i of=/dev/null bs=2k > /dev/null & |
| done |
| done |
| |
| # Wait for children |
| wait |
| |
| # Did we see any failures? |
| NEW_ERRORS=`egrep -ic "(error|fail|invalid|denied|cannot)" $LOGFILE` |
| ERRORS=$(( NEW_ERRORS - OLD_ERRORS )) |
| if [ $ERRORS -eq 255 ]; then |
| ERRORS=254 |
| fi |
| exit $ERRORS |
