Presto User's Guide Version 1.05

Koteras, J.R.; Gullerud, Arne S.

doi:10.2172/809999

Cited by 27 publications

(21 citation statements)

References 10 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(The value for f s ranges from 0.9 to 0.95 for our problems-a rigorous estimate can be made by using (8).) This value of f s results in t s close to and slightly less than the critical time step.…”

Section: Using the Lanczos-based Estimatementioning

confidence: 86%

See 1 more Smart Citation

Estimating the critical time‐step in explicit dynamics using the Lanczos method

Koteras

Lehoucq

2006

Numerical Meth Engineering

View full text Add to dashboard Cite

SUMMARYThe goal of our paper is to demonstrate the cost-effective use of the Lanczos method for estimating the critical time step in an explicit, transient dynamics code. The Lanczos method can provide a significantly larger estimate for the critical time-step than an element-based method (the typical scheme). However, the Lanczos method represents a more expensive method for calculating a critical time-step than elementbased methods. Our paper shows how the additional cost of the Lanczos method can be amortized over a number of time steps and lead to an overall decrease in run-time for an explicit, transient dynamics code. We present an adaptive hybrid scheme that synthesizes the Lanczos-based and element-based estimates and allows us to run near the critical time-step estimate provided by the Lanczos method.

show abstract

Section: Using the Lanczos-based Estimatementioning

confidence: 86%

“…This method for reusing a Lanczos-based time step estimate has been implemented in Presto [8], and employed within a number of explicit dynamics simulations. We discuss several of these examples.…”

Section: Numerical Experimentsmentioning

confidence: 99%

Estimating the critical time‐step in explicit dynamics using the Lanczos method

Koteras

Lehoucq

2006

Numerical Meth Engineering

View full text Add to dashboard Cite

show abstract

“…Consider a random vector Y , which is partitioned into a known part, Y (1) , and a portion to be determined, Y (2) . We may write, (see equation 2.109 of [57]),…”

Section: Advancing the Coarse Temporal Solutionmentioning

confidence: 99%

“…c (2,1) is an additional set of d rows of the correlation matrix associated with the time lag (2n + 2)T .…”

Section: Advancing the Coarse Temporal Solutionmentioning

confidence: 99%

Salinas : theory manual.

Walsh¹,

Reese²,

Bhardwaj³

2011

View full text Add to dashboard Cite

Salinas provides a massively parallel implementation of structural dynamics finite element analysis, required for high fidelity, validated models used in modal, vibration, static and shock analysis of structural systems. This manual describes the theory behind many of the constructs in Salinas. For a more detailed description of how to use Salinas , we refer the reader to Salinas, User's Notes.Many of the constructs in Salinas are pulled directly from published material. Where possible, these materials are referenced herein. However, certain functions in Salinas are specific to our implementation. We try to be far more complete in those areas.The theory manual was developed from several sources including general notes, a programmer notes manual, the user's notes and of course the material in the open literature.3 4

show abstract

“…Presto is a Lagrangian, three-dimensional explicit, transient dynamics code [12] for the analysis of solids subjected to large, suddenly applied loads. Presto is designed for problems with large deformations, nonlinear material behavior, and contact.…”

Section: Prestomentioning

confidence: 99%

Performance evaluation of the Red Storm dual‐core upgrade

Brightwell

Underwood

Vaughan

et al. 2009

Concurrency and Computation

View full text Add to dashboard Cite

SUMMARYIn 2007, the Cray Red Storm system at Sandia National Laboratories completed an upgrade of the processor and network hardware. Single-core 2.0 GHz AMD Opteron processors were replaced with dualcore 2.4 GHz AMD Opterons, while the network interface hardware was upgraded from a sustained rate of 1.1 GBps to 2.0 GBps (without changing the router link rates). These changes more than doubled the theoretical peak floating-point performance of the compute nodes and doubled the bandwidth performance of the network. This paper provides an analysis of the impact of this upgrade on the performance of several applications and micro-benchmarks. Performance results show that the additional core provides a performance boost of 20-50% for real applications on a fixed problem size per-socket basis on up to 2048 cores and that scalability is impacted relatively little by the upgrade.

show abstract

Presto User's Guide Version 1.05

Cited by 27 publications

References 10 publications

Estimating the critical time‐step in explicit dynamics using the Lanczos method

Estimating the critical time‐step in explicit dynamics using the Lanczos method

Salinas : theory manual.

Performance evaluation of the Red Storm dual‐core upgrade

Contact Info

Product

Resources

About