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Thread: Revit 2011: Multithreaded processes

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    Revit Technical Specialist - Autodesk Scott D Davis's Avatar
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    Default Revit 2011: Multi-threaded processes

    Here's THE list of mutli-threaded processes in Revit 2011 (platform, all flavors) direct from the Factory:

    • Revit Startup DLL Loading
    • Mental Ray Rendering (now uses unlimited cores)
    • Wall Join Cleanup
      • 64-bit OS: always on
      • 32-bit OS: 8+ Cores
    • File Open & Save
    • VHLR Printing
    • Worksharing Log Maintenance
    • Preview Generation in some Dialogs
    • Progress Display
    • Wait Cursors
    Hope that helps clear it up a bit. Certainly more to come in future releases!
    Last edited by Scott Davis; 2010-05-19 at 02:28 AM.

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    Default Re: Revit 2011: Multithreaded processes

    Quote Originally Posted by Scott Davis View Post
    Here's THE list of mutli-threaded processes in Revit 2011 (platform, all flavors) direct from the Factory:

    • Revit Startup DLL Loading
    • Mental Ray Rendering (now uses unlimited cores)
    • Wall Join Cleanup
      • 64-bit OS: always on
      • 32-bit OS: 8+ Cores
    • File Open & Save
    • VHLR Printing
    • Worksharing Log Maintenance
    • Preview Generation in some Dialogs
    • Progress Display
    • Wait Cursors
    Hope that helps clear it up a bit. Certainly more to come in future releases!
    Scott,
    First off, thanks! Good info to have, and good to know that it was so quickly forthcoming. Both bode well.
    Of course there has to be a few questions.
    1: On wall join cleanup, does this mean that in 64 bit OSs this is multi-threaded no matter what, but on 32 bit processors it is not multithreaded until you have 8 cores!? And is that physical cores, or would a quad core CPU with hyperthreading meet the requirements? And what happens if you go x64 on a single core machine? Especially if the old behavior was to only turn the feature on if you had more than two cores?
    2: What is VHLR printing? I would assume "Virtual Hidden Line Removal" (thank you Google! . Does this apply to vector and raster printing? Or just one or the other?

    And in general, it would be nice to know how the Factory feels about hyperthreading. Is this something that just makes a lot of sense across the board, or does Revit have some unique needs/behaviors that make hyperthreading a liability? And how about turbo boost? I would hope that when Revit kicks into a multi-threaded task, the CPU ramps down the clock for the duration of the task, then ramps up the clock again as Revit drops the extra threads. But how Revit and/or the OS manages this could have an impact. For example, it would not surprise me at all if Turbo Boost really requires Windows 7 to work right, if say XP or Vista don't release threads in a timely manner. This is the kind of advice I would like to see the Factory provide, because otherwise users can be buying all sorts of things that either fail to provide a benefit, or even impede performance.

    Thanks!
    Gordon

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