Notices
Results 1 to 1 of 1

Thread: One quintillion calculations per second

  1. #1 One quintillion calculations per second 
    Forum Radioactive Isotope cosmictraveler's Avatar
    Join Date
    May 2005
    Location
    Key West, Florida, Earth
    Posts
    4,789
    It's expected that the world's supercomputers will be capable of breaking the exascale barrier, or one quintillion calculations per second within 10 to 20 years.

    How do they do it? I wonder what the new designs will be like.

    The potential speed-up of an algorithm on a parallel computing platform is given by Amdahl's law, originally formulated by Gene Amdahl in the 1960s.[11] It states that a small portion of the program which cannot be parallelized will limit the overall speed-up available from parallelization. A program solving a large mathematical or engineering problem will typically consist of several parallelizable parts and several non-parallelizable (sequential) parts. If is the fraction of running time a program spends on non-parallelizable parts, then
    is the maximum speed-up with parallelization of the program. If the sequential portion of a program accounts for 10% of the runtime, we can get no more than a 10 speed-up, regardless of how many processors are added. This puts an upper limit on the usefulness of adding more parallel execution units. "When a task cannot be partitioned because of sequential constraints, the application of more effort has no effect on the schedule. The bearing of a child takes nine months, no matter how many women are assigned


    Last edited by cosmictraveler; March 31st, 2013 at 06:31 PM.
    When the power of love overcomes the love of power the world will know peace.
    Jimi Hendrix
    Reply With Quote  
     

  2.  
     

Similar Threads

  1. Distance Calculations Reset
    By MrMojo1 in forum Physics
    Replies: 6
    Last Post: October 18th, 2012, 11:20 AM
  2. Calculations and cycle times 30,000
    By Goddard in forum Computer Science
    Replies: 4
    Last Post: November 24th, 2009, 07:00 AM
  3. Lava flow calculations
    By dg2008 in forum Mathematics
    Replies: 0
    Last Post: October 11th, 2009, 04:40 PM
  4. Mortgage calculations
    By sak in forum Mathematics
    Replies: 5
    Last Post: July 9th, 2009, 05:44 AM
  5. confusion over moles calculations
    By fuzzyduk in forum Chemistry
    Replies: 0
    Last Post: November 22nd, 2007, 04:43 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •