Applications performance under OSF/1 AD and SUNMOS on Intel Paragon XP/S-15

Author

Saini, Subhash ; Simon, Horst D.

Author_Institution

Comput. Sci. Corp., NASA Ames Res. Center, Moffett Field, CA, USA

fYear

1994

fDate

14-18 Nov 1994

Firstpage

580

Lastpage

589

Abstract

On Paragon, two operating systems are available: OSF/1 AD and SUNMOS. The chief drawbacks of OSF/1 AD are: OSF/1 AD takes about 8 MB of memory on each node of the Paragon; messages can be sent only at a bandwidth of 30-35 MB per second compared to 200 MB per second peak advertised rate; latencies are on the order of 100 microseconds using Intel NX calls under OSF/1 AD. All these drawbacks can be minimized by using SUNMOS. SUNMOS takes only 250 KB of memory on each node and can send messages at bandwidth of 170 MB per second with latencies of 70 microseconds. We have measured the performance of applications under OSF/1 AD and SUNMOS and found that under OSF/1 AD, performance does not scale as the number of nodes increases, whereas under SUNMOS it seems to scale because of higher communication bandwidth

Keywords

operating systems (computers); parallel machines; parallel programming; Intel NX calls; Intel Paragon XP/S-15; OSF/1 AD; Open Software Foundation AD server; SUNMOS; applications performance; communication bandwidth; latencies; operating systems; Application software; Assembly; Bandwidth; Clocks; Delay; Microprocessors; NASA; Numerical simulation; Operating systems; Virtual prototyping;

fLanguage

English

Publisher

ieee

Conference_Titel

Supercomputing '94., Proceedings

Conference_Location

Washington, DC

Print_ISBN

0-8186-6605-6

Type

conf

DOI

10.1109/SUPERC.1994.344322

Filename

344322