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HPC Large Allocation Proposals

This form is used to request access to Engineering specific cycles on DeepThought2 (DT2). These proposals will be evaluated by an Engineering faculty committee on a quarterly basis with award dates on the first day of January, April, July, and October. Engineering has approximately 20M Service Units/Year to allocate in this fashion. A service unit (SU) is 1 Core Hour (most nodes on DT2 have two 10 core nodes = 20 cores per node). 

All Tenure/Tenure-Track faculty will be granted a start-up allocation of 50K SU's through a separate application. These cycles are granted as soon as possible without a faculty review. This Engineering HPC allocation proposal is for requesting time beyond a start-up allocation and will be awarded for a one year period (equally divided over each quarter). 

The campus also has a separate application process that our faculty are eligible to request cycles. These allocations all run on the same DT2 infrastructure


The figure shows the parallel performance of 2 different solvers (left plot and right plot). For each solver, the parallel performance is measured by a speedup factor S_N (left y-axis) and an efficiency factor E_N (right y-axis) as a function of number N of processing elements (PEs, meaning cores) actually used (x-axis). 

Parallel speedup S_N = (time to compute problem using 1 PE) / (time to compute same problem using N PEs) 

Parallel efficiency E_N = (time to compute problem using 1 PE) / (N x (time to compute same problem using N PEs)) = (S_N/N) 

Ideally, S_N = N and E_N = 1. Values of S_N below N and E_N below 1 indicate a loss of parallel performance. Note that this test has to be done for a problem of sufficient size and relevant-to/representative-of the user application area.