Newsgroups: comp.parallel.pvm
From: wjiang@thud.cs.utk.edu (weicheng jiang   )
Subject: Re: SUNMP performance
Organization: Computer Science Dept, University of Tennessee, Knoxville
Date: 22 Aug 1995 17:42:19 GMT
Message-ID: <41d4trINNpn4@CS.UTK.EDU>

In article <Pine.SOL.3.91.950822122616.20401A-100000@suma3.reading.ac.uk>, Graham Edward Fagg <sssfagg@reading.ac.uk> writes:
|> Dear All,
|>  I've been trying to comparing a CS2 and a SunMP Sparc2000. The figures 
|> for message transfer rates between nodes in the Sun is around 
|> 3Mbytes/sec. This seems a quite small and makes me think that the SUN is 
|> not using a shared memory interface. Is there one, and how do I enable it?
|> 

I have gotten much better results with PVM on a 4-way Sparc10:

send/recv (Raw)
---------------

Node-to-node Send/Ack

Roundtrip T = 739 (us)  (0.0000 MB/s)      Data size: 0
Roundtrip T = 618 (us)  (0.2589 MB/s)      Data size: 80
Roundtrip T = 769 (us)  (2.0806 MB/s)      Data size: 800
Roundtrip T = 2451 (us)  (6.5279 MB/s)      Data size: 8000
Roundtrip T = 23026 (us)  (6.9487 MB/s)      Data size: 80000
Roundtrip T = 322957 (us)  (4.9542 MB/s)      Data size: 800000


send/recv (InPlace)
-------------------

Node-to-node Send/Ack

Roundtrip T = 718 (us)  (0.0000 MB/s)      Data size: 0
Roundtrip T = 653 (us)  (0.2450 MB/s)      Data size: 80
Roundtrip T = 840 (us)  (1.9048 MB/s)      Data size: 800
Roundtrip T = 1864 (us)  (8.5837 MB/s)      Data size: 8000
Roundtrip T = 13551 (us)  (11.8072 MB/s)      Data size: 80000
Roundtrip T = 198882 (us)  (8.0450 MB/s)      Data size: 800000


psend/precv
-----------

Node-to-node Send/Ack

Roundtrip T = 46 (us)  (0.0000 MB/s)      Data size: 0
Roundtrip T = 64 (us)  (2.5000 MB/s)      Data size: 80
Roundtrip T = 155 (us)  (10.3226 MB/s)      Data size: 800
Roundtrip T = 991 (us)  (16.1453 MB/s)      Data size: 8000
Roundtrip T = 8425 (us)  (18.9911 MB/s)      Data size: 80000


-Weicheng Jiang
PVM Group, University of Tennessee

