CTWatch
Volume 2 Number 4A
November 2006 A
High Productivity Computing Systems and the Path Towards Usable Petascale Computing
Printable Format
What’s Working in HPC: Investigating HPC User Behavior and Productivity
Nicole Wolter, San Diego Supercomputing Center
Michael O. McCracken, San Diego Supercomputing Center
Allen Snavely, San Diego Supercomputing Center
Lorin Hochstein, University of Nebraska, Lincoln
Taiga Nakamura, University of Maryland, College Park
Victor Basili, University of Maryland, College Park

5
Processor Count Average Median Maximum Minimum
8 8.87 0.06 858.93 0.00
64 12.64 0.45 792.33 0.00
128 24.12 2.56 752.67 0.00
256 21.13 3.51 415.69 0.00
512 19.79 3.81 266.44 0.00
1024 23.99 9.07 205.49 0.00
Table 1. Wait time of jobs 2003-06 on DataStar, in hours.
Processor Count Average Median Maximum Minimum
8 2.43 0.52 624.89 0.00
64 2.49 0.69 49.42 0.00
128 3.84 0.63 105.01 0.00
256 3.33 0.46 100.06 0.00
512 3.13 0.40 19.44 0.02
1024 2.60 0.31 18.01 0.03
Table 2. Run time of jobs 2003-06 on DataStar, in hours.
Processor Count Average Median Maximum Minimum
8 8.02 1.15 22666.83 1.00
64 19.22 1.66 11826 1.00
128 68.71 3.31 5137.17 1.00
256 44.42 5.35 3809.40 1.00
512 53.53 6.00 3924.50 1.00
1024 90.69 11.68 2800.39 1.00
Table 3: Expansion factor for jobs 2003-06 on DataStar
Figure 1. Run time Distribution, Grouped by Job Size.

Figure 1. Run time Distribution, Grouped by Job Size.
Figure 2. Wait time Distribution, Grouped by Job Size.

Figure 2. Wait time Distribution, Grouped by Job Size.

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Reference this article
Wolter, N., McCracken, M. O., Snavely, A., Hochstein, L., Nakamura, T., Basili, V. "What's Working in HPC: Investigating HPC User Behavior and Productivity," CTWatch Quarterly, Volume 2, Number 4A, November 2006 A. http://www.ctwatch.org/quarterly/articles/2006/11/whats-working-in-hpc-investigating-hpc-user-behavior-and-productivity/

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