dtw

Linux磁盘测试的源代码,测试磁盘的读写性能

#!/bin/csh
#	%Z%%M% %I% %E%
#
#	Date:	August 21, 1990
#	Author:	Robin Miller
#
#	Description:
#
#	This script is used to write test patterns to the specified
#	device.  The format after this writing is:
#
#	Each pattern is 300 blocks in length and the same pattern is
#	repeated in each block.  This is true of the first 6 patterns,
#	but the last 4 patterns repeat every 4 or 8 blocks.
#
#	There is a total of 10 data patterns.
#
# Arguments:
#	$1	The device name.
#	$2	The log file name.
#	$3	The block limit.
#	$4	The block size(s).
#	$5	The pass count.
#	$6	Enable debug flag.
#
set DEVICE=$1
set LOG_FILE=$2
set DATA_LIMIT=$3
set BLOCK_SIZES=$4
set PASS_COUNT=$5
set DEBUG_FLAG=$6
#
set BLOCK_SIZE=512
set END_OF_FILE="-2"
set PAT_PREFIX="pattern_"
set PAT_BLOCKS=300
set PAT_LENGTH=`expr $PAT_BLOCKS \* $BLOCK_SIZE`
set NUM_PATTERNS=10
set CAPACITY=1170568
if ($DEVICE == '') then
    echo "Usage: dtw device [ log_file block_limit block_sizes pass_count debug ]";
    exit 1
endif
if ($DEVICE != '') then
    if (`dirname $DEVICE` != '/dev') then
	set DEVICE=/dev/$DEVICE
    endif
endif
if ($LOG_FILE == '') then
	set LOG_FILE=dtw.log
endif
if ($DATA_LIMIT == '') then
	set DATA_LIMIT=$CAPACITY
endif
#
# Please Note:  The block sizes used must divide evenly into the
#		pattern length to properly calculate the seek count.
#
if ($BLOCK_SIZES == '') then
#	set BLOCK_SIZES="512 1024 2048 5120 10240"
	set BLOCK_SIZES="10240 5120 2048 1024 512"
endif
if ($PASS_COUNT == '') then
	set PASS_COUNT=1
endif
if ($DEBUG_FLAG == 'none') then
	set DEBUG_OPTS=""
else if ($DEBUG_FLAG == 'debug') then
	set DEBUG_OPTS="enable=coredump,debug,dump"
else
	set DEBUG_OPTS="enable=dump,aio"
endif
if (-f $LOG_FILE) then
	rm -f $LOG_FILE
endif
#
# Main Test Loop
#
foreach bs ($BLOCK_SIZES)
  set RECORD_COUNT=`expr \( $PAT_LENGTH / $bs \)`
  set data_limit=0
  set pattern_count=0
  while ($data_limit < $DATA_LIMIT)  
    set pattern_num=0
    while ($pattern_num != $NUM_PATTERNS)
	set PATTERN_NAME="$PAT_PREFIX$pattern_num"
	set SEEK_COUNT=`expr \( $pattern_count + $pattern_num \) \* \( $PAT_LENGTH / $bs \)`
	set record_count=$RECORD_COUNT
echo	dt of=$DEVICE records=$record_count bs=$bs log=$LOG_FILE pf=$PATTERN_NAME seek=$SEEK_COUNT disable=stats,verify passes=$PASS_COUNT $DEBUG_OPTS >> $LOG_FILE
#	echo "" >> $LOG_FILE
	dt of=$DEVICE records=$record_count bs=$bs log=$LOG_FILE pf=$PATTERN_NAME seek=$SEEK_COUNT disable=stats,verify passes=$PASS_COUNT $DEBUG_OPTS
	set exit_status=$status
	if ($exit_status) then
	    if ($exit_status == $END_OF_FILE) then
		break ; break
	    else
		file $DEVICE
		exit ($exit_status)
	    endif
	endif
	set pattern_num=`expr $pattern_num + 1`
	set block_count=`expr \( $record_count \* $bs \) / $BLOCK_SIZE`
	set data_limit=`expr $data_limit + $block_count`
	if ($data_limit >= $DATA_LIMIT) then
	    break
	endif
    end
    set pattern_count=`expr $pattern_count + $NUM_PATTERNS`
  end
  echo "" >> $LOG_FILE
  echo "*** End of Test ***" >> $LOG_FILE
  echo "" >> $LOG_FILE
end