• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Tim Cooke
  • Devaka Cooray
  • Ron McLeod
  • Jeanne Boyarsky
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Piet Souris
  • Carey Brown
  • Tim Holloway
Bartenders:
  • Martijn Verburg
  • Frits Walraven
  • Himai Minh

Concurrency supported by all multicore?

 
Ranch Hand
Posts: 664
Eclipse IDE Chrome
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
"On a single processor, multithreading generally occurs by time-division multiplexing (as in multitasking): the processor switches between different threads. This context switching generally happens frequently enough that the user perceives the threads or tasks as running at the same time. On a multiprocessor or multi-core system, the threads or tasks will actually run at the same time, with each processor or core running a particular thread or task."
external source

Does anyone have a research paper indicating processors which support or might not support concurrency?
Is concurrency supported by ALL multicore processors?
What vendor-specific (e.g. Intel, AMD) features would a systems programmer confirm with the processor documentation to ensure that it is supported?

 
Saloon Keeper
Posts: 14505
325
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Concurrency isn't "supported" by any processor. Concurrency is the logical consequence of using multiple processors. For a single processor concurrency can be mimicked by software.
 
Jon Camilleri
Ranch Hand
Posts: 664
Eclipse IDE Chrome
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

Stephan van Hulst wrote:Concurrency isn't "supported" by any processor. Concurrency is the logical consequence of using multiple processors. For a single processor concurrency can be mimicked by software.



Concurrency is a software feature coded in Java that uses threads, which I think must be supported by the processor, am I right?
 
Rancher
Posts: 43028
76
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
No. Concurrency in the JVM is possible on single-core, single-CPU machines.
 
Could you hold this puppy for a sec? I need to adjust this tiny ad:
the value of filler advertising in 2021
https://coderanch.com/t/730886/filler-advertising
reply
    Bookmark Topic Watch Topic
  • New Topic