New tools using the hardware performance monitor to help users tune programs on the Cray X-MP

Conference · Wed Sep 25 00:00:00 EDT 1991

OSTI ID:5094013

Engert, D E; Rudsinski, L ^[1]; Doak, J ^[2]

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1. Argonne National Lab., IL (United States)
2. Cray Research, Inc., Minneapolis, MN (United States)

The performance of a Cray system is highly dependent on the tuning techniques used by individuals on their codes. Many of our users were not taking advantage of the tuning tools that allow them to monitor their own programs by using the Hardware Performance Monitor (HPM). We therefore modified UNICOS to collect HPM data for all processes and to report Mflop ratings based on users, programs, and time used. Our tuning efforts are now being focused on the users and programs that have the best potential for performance improvements. These modifications and some of the more striking performance improvements are described.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5094013
• Report Number(s): ANL/CP-74428; CONF-9109276-5; ON: DE92001926
• Resource Relation: Conference: Visions of supercomputing conference, Santa Fe, NM (United States), 23-27 Sep 1991
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CRAY COMPUTERS
OPTIMIZATION
MODIFICATIONS
MONITORS
PERFORMANCE
TUNING
COMPUTERS
MEASURING INSTRUMENTS
990200* - Mathematics & Computers