challenges and opportunities for system software in the multi core era
Download
Skip this Video
Download Presentation
Challenges and Opportunities for System Software in the Multi-Core Era

Loading in 2 Seconds...

play fullscreen
1 / 7

Challenges and Opportunities for System Software in the Multi-Core Era - PowerPoint PPT Presentation


  • 113 Views
  • Uploaded on

Challenges and Opportunities for System Software in the Multi-Core Era. or The Sky is Falling, The Sky is Falling!. Challenge: scaling. Scaling software Virtual Machine Monitors (easy) Operating Systems (hard) Applications (hardest) Scaling hardware Memory bandwidth I/O bandwidth

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 'Challenges and Opportunities for System Software in the Multi-Core Era' - avalon


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
challenges and opportunities for system software in the multi core era

Challenges and Opportunities for System Software in the Multi-Core Era

or

The Sky is Falling, The Sky is Falling!

challenge scaling
Challenge: scaling
  • Scaling software
    • Virtual Machine Monitors (easy)
    • Operating Systems (hard)
    • Applications (hardest)
  • Scaling hardware
    • Memory bandwidth
    • I/O bandwidth
  • Prediction: mainstream will remain < 100 cores for next 5 years. Lack of applications, Amdahl’s law and power efficiency constraints.
challenge scheduling
Challenge: scheduling
  • Too expensive to context switch
    • gang scheduling many cores inefficient
    • disruptive to application
  • Complex resource hierarchy
    • cache, memory, I/O
  • Opportunity: VMM and OS schedulers will have to understand and schedule complex hierarchies
  • Prediction: partitioning cores rather than time sharing will be the norm
challenge isolation
Challenge: isolation
  • Fault isolation and recovery
    • Large transistor count => cores will fail
  • Performance isolation
    • Shared resources, e.g., caches, I/O bandwidth
  • Opportunity:
    • Build fault containment mechanisms into the system architecture
    • Provide resource reservation controls
    • System software must handle and recover from faults, enforce performance isolation
    • Virtualization makes physical machines stateless and interchangeable
challenge distance
Challenge: distance
  • Off-chip resources get farther and farther
    • Latency-bound applications suffer
    • I/O becomes even more heavy-weight
  • Opportunity
    • Bring communication closer to the cores
    • Rethink I/O architectures
  • Prediction
    • We will see on-chip I/O controllers and buses
opportunity assists
Opportunity: assists
  • Extra cores can be used for
    • I/O processing
    • self monitoring
  • Specialized cores
    • computation (conventional and stream)
    • communication (TCP processing)
    • graphics processing (GPU elements)
  • System software to take advantage of these resources
opportunity virtualization
Opportunity: virtualization
  • Killer app for multi-core
    • Easier to scale job-level parallelism
  • Power efficiency
    • Scale each application to maximize performance per watt
  • Hide complex hardware topology
ad