What is the true cost of linpack james a ang ph d sandia national laboratories
Download
1 / 4

What is the True Cost of Linpack ? James A. Ang , Ph.D. Sandia National Laboratories - PowerPoint PPT Presentation


  • 141 Views
  • Uploaded on

SAND2013-3351P. What is the True Cost of Linpack ? James A. Ang , Ph.D. Sandia National Laboratories. Disclaimer: The opinions e xpressed d o not represent Sandia, NNSA/ASC, SC/ASCR, or DOE policy. 1. Assumptions. Leadership class system: C ost: $200M Lifetime: 4 years

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'What is the True Cost of Linpack ? James A. Ang , Ph.D. Sandia National Laboratories' - diata


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
What is the true cost of linpack james a ang ph d sandia national laboratories

SAND2013-3351P

What is the TrueCost of Linpack?James A. Ang, Ph.D.Sandia National Laboratories

Disclaimer: The opinions expressed do not represent Sandia, NNSA/ASC, SC/ASCR, or DOE policy

1


Assumptions
Assumptions

  • Leadership class system:

    • Cost: $200M

    • Lifetime: 4 years

    • Power consumption: 10MW

  • Cost of one MW-year is $1M

  • Linpack measurement requires system for a week

    • To achieve a high fraction of peak requires a large problem size so a typical MP Linpack run takes a day

      • Multiple runs are made as initial tests are run with “small” problems

      • Successive tests use larger and larger problem sizes, some of these tests will “fail” – requiring re-runs

2


Cost estimates
Cost Estimates

  • Electricity Cost

    • One week of usage ≈ [1/50 year] x 10MW = 0.20 MW-year = $0.2M

  • Amortized CapEx Cost

    • Opportunity cost associated with one week of usage

    • One week of dedicated system time is 1/200th of the life of the machine

      • That week represents 1/200 of the cost of the system or $1M

      • The cost for one week of time on a new system is > $1M

  • Staff Cost

    • One week of how many peoples’ loaded salaries?

    • How many are working around the clock?

      • Pizzas, Fried Chicken, Breakfast Burritos, Beer, Ice Cream, etc.

3


The true cost of linpack
The True Cost of Linpack

  • The fact that MP Linpack has been the Primary Metric for the Supercomputing community has another cost

    • Because leadership class system architects are motivated by the Top500 list, HPC systems have suffered from distorted priorities that skew system balance

    • The resulting poor fraction of peak performance for our mission applications is an element of the true cost of Linpack

  • This cost: Priceless

  • DOE efforts to define proxy apps that reflect how our real apps use balanced system architectures will help