Newsgroups: comp.parallel.pvm
From: zhou@isis.epm.ornl.gov (Honbo Zhou)
Subject: Re: PVM version using FORE ATM API
Organization: Oak Ridge National Lab, Oak Ridge, TN
Date: 7 Jul 1994 20:45:41 GMT
Message-ID: <2vhphl$5uf@stc06.CTD.ORNL.GOV>

In article <2vf7qk$9ol@vixen.cso.uiuc.edu>, billh@lisboa.ks.uiuc.edu (William F. Humphrey) writes:
|> Hello -
|> 
|> 	Several days ago a person posted a note describing an effort to use PVM  
|> with the FORE Systems ATM-network API.  I have tried to contact this person for  
|> more information, but have not heard anything back.  And so, a general request  
|> - I'm looking for anyone with information about a version of PVM which uses the  
|> FORE ATM API.  Our research group operates a network of several HP 735's with  
|> ATM interfaces, and we are very interested in applications which could take  
|> advantage of the ATM API and avoid some of the TCP/IP overhead.
|> 
|> --
|> /*     Bill Humphrey		(billh@ks.uiuc.edu)		*/
|> /* Theoretical Biophysics		| Nothing matters but	*/
|> /* Beckman Institute - U. of Illinois	| the weekend, from a	*/
|> /* 405 North Matthews			| Tuesday point of view	*/
|> /* Urbana, IL  61801			|			*/
|> /* phone: (217) 244-1851		| fax: (217) 244-6078	*/

Yes, there is an effort in the PVM team using Fore's Adaptive ATM Layer
API to achieve a better performance over ATM network.  A route called 
PvmRouteAal is constructed in the same way as the PvmRouteDirect route.
You need to wait until the implementation is well tested.

Here are some numbers about the performance from some initial tests.

PvmRouteAal over ATM network
----------------------------
i'm t80001
slave is task t40002
Doing Round Trip test, minimal message size

 N     uSec
 1    95596
 2     2225
 3     3295
 4     2198
 5     2191
RTT Avg uSec 21101

Doing Bandwidth tests


Message size 100
 N  Pack uSec  Send uSec
 1        267       3944
 2        289       2248
 3        249       4257
 4        270       2322
 5        249       2154
Avg uSec
          264       2985
Avg Byte/uSec
     0.378788   0.033501

Message size 400
 N  Pack uSec  Send uSec
 1        317       4232
 2        287       2362
 3        280       2313
 4        294       2278
 5        407       2306
Avg uSec
          317       2698
Avg Byte/uSec
     1.261830   0.148258

Message size 1600
 N  Pack uSec  Send uSec
 1        419       3438
 2        375       2550
 3        440       2543
 4        376       3151
 5        392       3101
Avg uSec
          400       2956
Avg Byte/uSec
     4.000000   0.541272

Message size 6400
 N  Pack uSec  Send uSec
 1       1731       4407
 2        930       3600
 3        909       3484
 4        947       3536
 5        902       4723
Avg uSec
         1083       3950
Avg Byte/uSec
     5.909511   1.620253
------------------------


PvmRouteDirect over ATM network
-------------------------------
i'm t80007
slave is task t40004
Doing Round Trip test, minimal message size

 N     uSec
 1    35113
 2     2533
 3     2443
 4     2696
 5     2474
RTT Avg uSec 9051

Doing Bandwidth tests


Message size 100
 N  Pack uSec  Send uSec
 1        259       2779
 2        264       2666
 3        250       4185
 4        265       2903
 5        257       2640
Avg uSec
          259       3034
Avg Byte/uSec
     0.386100   0.032960

Message size 400
 N  Pack uSec  Send uSec
 1        308       3157
 2        290       4235
 3        519       3030
 4        295       3013
 5        290       3094
Avg uSec
          340       3305
Avg Byte/uSec
     1.176471   0.121029

Message size 1600
 N  Pack uSec  Send uSec
 1        414       4174
 2        376       4287
 3        387       4083
 4        377       4781
 5        384       4060
Avg uSec
          387       4277
Avg Byte/uSec
     4.134367   0.374094

Message size 6400
 N  Pack uSec  Send uSec
 1       1721       9057
 2        947       9104
 3        905       8939
 4        947       9053
 5        902       8383
Avg uSec
         1084       8907
Avg Byte/uSec
     5.904059   0.718536

-- 
Honbo Zhou (Ph. D.),   (615) 481-8354 (H), 576-6129 (O)
Engineerin, Physics, and Mathematics Division  ---- PVM
Oak Ridge National Laboratory, Oak Ridge, TN 37831-6367
          http://www.epm.ornl.gov/~zhou

