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- DTA 1.00 (18.11.94) DTA
-
- NAME
- DTA - Data Transfer Analysis
-
- SYNOPSIS
- Gives a very general and simple analysis of transfer speeds.
-
- INPUTS
- FILE - File to test transfer of data with (Make it a LARGE one!)
-
- RESULTS
- The following is an example of some of the useful information DTA
- will display for you.
-
- CPU: 68040/68882
-
- Volume: DH1 (DCFFS)
-
- Processing file "dl:LionKing.lha".
-
- Read 946054 bytes / 923.9K in 0 seconds and ~432129 microseconds.
-
- Data Transfer Analysis (DTA) = 2.1M/second (2189286 bytes/second).
-
- The idea behind this very simple/crude program is to give you an
- average idea of how well your machine/controller/drive are performing
- together. The whole "analysis" depends on the number of buffers and
- what type of memory they are in, your drive/controller speed, your
- system's CPU load, the maxtransfer and DMA settings, file system, ...
-
- This program just samples the time, reads a LARGE file, and samples
- the time again...
-
- I wrote this to test the results of changing some settings with a
- ZorroII (NonDMA) SCSI board with a friends A4000. We tried changing
- the maxtransfer, buffer memory type & size, and changing the DMA mask.
-
- On the whole we got the best results that were opposite of the
- suggested ones. For example we set the DMA mask so we COULD DMA
- into all our memory, which was surprising, BIG speed gain. We
- also kept "ANY" for the buffer memory type, CHIP/24bitDMA was
- actually somewhat slower... The big thing with his drive is the
- maxtransfer. For whatever reason it will not allow a very large
- one, we got the best result with a 128kb = $200000, however I would
- suggect trying the default and doing a "Copy BUF=0 <largefile> to RAM:"
- BUF=0 sets the buffer size to that of the file you are copying. If
- your machine locks up then your drive requires a smaller maxtransfer.
-
- This program was written for ourself to test some hardware. If
- you find it usefull then please use it. If you think the results
- are not all-together there then do not use it. I would suggest
- only using it to compare changes that you are making to a drive.
-
-
- NOTES
- This software, in its unmodified form and in its entirity, may be
- freely distributed as long as no profits are gained.
-
- THIS SOFTWARE IS PROVIDED BY IMAGINE SOFTWARE INC. "AS IS" AND ANY
- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IMAGINE SOFTWARE INC. BE
- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
- OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- DTA 1.00 (18.11.94) Engineered by Trevor Andrews
- Copyright 1994 Imagine Software, Inc. All Rights Reserved.
-
- Imagine Software, Inc.
- 1218 South 5th Street
- Lafayette, IN 47905-1716
-