Newsgroups: comp.sys.transputer
From: kitten@transcom.mipt.su (Katalov Vladimir Yurievich)
Subject: Re:Re: LOOKING FOR DISTRIBUTORS...
Organization: Transcomp Ltd.
Date: Mon, 26 Sep 94 13:22:38 +0400
Message-ID: <ABUBfXk4C3@transcom.mipt.su>

>>In article AAFBNVk4C3@transcom.mipt.su,  kitten@transcom.mipt.su (Katalov Vladimir Yurievich) writes:
>>
>> ..
>>
>>
>> Are you kidding? 3MB/32sec ~ 90kByte/sec! Performance????
>>
>> ---
>> *  Roland Reiss                         rreiss@eso.org
>> *  Optical Detectors                    +49-89-32006-390
>> *  European Southern Observatory        Karl-Schwarzschild-Str. 2
>> *                                       D-85748 Garching, Germany

 Below are bencmarcs for the last version of our WServer:

-----------------------------------------------------------------------
                                  Test #1                 Test#2
                                Time  Speed           Time    Speed
                               (sec)  (Kbyte/sec)    (sec)  (Kbyte/sec)
-----------------------------------------------------------------------
 MS DOS mode (INMOS Iserver)    6.0     167.0         76      39.5
 MS Windows  (ELCOM WServer)    4.77    210.0         24     125.0
-----------------------------------------------------------------------

Test #1: Transfer of 1 Mbyte memory block from Transputer memory to PC memory
Test #2: Write 1 Mbyte data to file on hard disk, close file, and copy this
         file to another location on hard disk

Tests was provided on following equipment:
CPU 486DX2-66, AMI BIOS, Conner CP3544 (IDE, 12ms) HDD
TRANSTECH TMB08 board (B008 compatible) with TTM3 TRAM (T800-20+1MB 0WS DRAM)

You see, that it's a large difference between easy data transfer from memory-
-to-memory and file operations, because they are also depend of the speed of
disk, disk controller etc. The data is transferred by blocks (512 bytes in
INMOS Iserver and 32Kbytes in our WServer), so add also the time for polling
of C012 registers (R/w status etc.). In any case, the full "physical" speed
of transputer link throughput (20 Mbit/sec) isn't achievable.
You can also see, that the speed of our WServer is much more better, than
speed of INMOS Iserver (if you would like to compare with any other server -
- do it)!!!!

Best regards!
Vladimir Katalov
ELCOM Ltd.
kitten@transcom.mipt.su


