dtt

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 7, 1990
#	Author:	Robin Miller
#
#	Description:
#
#	This script file is used to gather tape performance data using
#	different block sizes.  Please note, the total statistics will
#	reflect a slower performance due to the timing of tape rewind
#	between the write and read passes (this is expected).
#
# Arguments:
#	$1	The tape device.
#	$2	The log file name.
#	$3	The data limit (bytes).
#	$4	The block size(s).
#	$5	The pass count.
#
set DEVICE=$1
set LOG_FILE=$2
set DATA_LIMIT=$3
set BLOCK_SIZES=$4
set PASS_COUNT=$5
if ($DEVICE == '') then
    echo "Usage: dtt device [ log_file data_limit block_sizes pass_count ]";
    exit 1
endif
if ($DEVICE != '') then
    if (`dirname $DEVICE` != '/dev') then
	set DEVICE=/dev/$DEVICE
    endif
endif
if ($LOG_FILE == '') then
	set LOG_FILE=dtt.log
endif
if ($DATA_LIMIT == '') then
	set DATA_LIMIT=10m
endif
if ($BLOCK_SIZES == '') then
	set BLOCK_SIZES="10k 16k 32k 64k 126b"
#	set BLOCK_SIZES="2k 4k 8k 10k 12k 16k"
endif
if ($PASS_COUNT == '') then
	set PASS_COUNT=1
endif
#
# Test the tape device using different block sizes.
#
rm -f $LOG_FILE
foreach bs ($BLOCK_SIZES)
	dt of=$DEVICE disable=compare limit=$DATA_LIMIT bs=$bs log=$LOG_FILE passes=$PASS_COUNT
	mt -f $DEVICE rewind
	echo "" >> $LOG_FILE
	echo "*** End of Test ***" >> $LOG_FILE
	echo "" >> $LOG_FILE
end