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Could the MS Interrupt-Affinity Filter tool be of any benefit in a cMP setup?

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hfavandepas

In Reply to: RE: cMP - the open source high-end Memory Player posted by cics on December 30, 2007 at 05:42:01

Hi Cics,

In Vangelis71�s thread I red about the MS Interrupt-Affinity Filter tool (See also: http://support.microsoft.com/kb/252867 ) to lock specific hardware too a specific cpu on a multi-processor platform.

The cMP-shell is locking the most critical audio thread to CPU1 on a software level. Would it be any good to use the Interrupt-Affinity Filter tool and lock al non audio critical hardware to CPU0 (so to free up CPU1) and lock the Lynx card (and possibly other audio critical hardware) to CPU1? (as Vangelis71 does in his Atom setup)

Mark

fully AOB optimized cMP2 PC -> Lynx AES16 -> XLR AES/EBU -> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300

MS Interrupt-Affinity Filter tool (Open in New Window)

Follow Ups:

Affinity Filter tool - play-mate 01:36:54 05/14/10 (4)
hey mark,

this affinity tool is only for win2000, isn�t ?

I did change the core affinity manually acording to recommendation on my XP system (read lynx card & mixer one core 1).
cMP does set the affinity to it�s prefered setting per automatic, as you correctly point out.

but I think this apply to win2000 only.

kind regards
- RE: Affinity Filter tool - hfavandepas 06:21:16 05/16/10 (3)
  Hi Play-mate,
  
  Vangelis71 is using it on Vista SP2, but some googling suggests that it also can be used in XP. Here ( http://tech.xptechsupport.com/61-free-tools-from-microsoft-to-support-windows-xp.html ) it says that the affinity tool used to be a part of the XP resource kit.
  
  Yes I also red that cMP locks software to a specific CPU. But does cMP also locks specific hardware to a specific CPU? And if �no�, is it any good to do so in a cMP setup?
  
  But since I don�t really know if cMP is also locking specific hardware to a specific CPU and I also don�t know if it is any good to do so on a cMP setup (and Cics didn�t comment on it in this threat: http://www.audioasylum.com/forums/pcaudio/messages/7/74114.html ) I thought: well lets make it specific question, so that others and/or Cics can comment on the use of the Interrupt Affinity Filter tool in a cMP setup.
  
  fully AOB optimized cMP2 PC -> Lynx AES16 -> XLR AES/EBU -> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300
  - RE: Affinity Filter tool - cics 09:07:46 05/16/10 (2)
    Had a brief look at this interesting tool. One needs to test and confirm results.
    
    My preference is to eliminate as many devices from the system that way doing away with unwanted interrupts altogether. There's still a few (less than 10) remaining and this utility could help. When using 2 separate cores there's a good chance this will be of benefit - using a single core with HT will be less so as caches are shared.
    
    I've been too busy trying to fix my 32nm setup...
    - RE: Affinity Filter tool - Marcin_gps 04:00:29 10/21/10 (0)
      Hi,
      
      Anyone had a chance to test this tool? I'm running dual-core CPU and it has quite an impact on the sound, but I'm not sure I like it. What's your experience?
    - No Hurry. - hfavandepas 09:22:53 05/16/10 (0)
      No hurry, it can wait.
      
      Hi Cics,
      
      Thankx for reply.
      
      So it�s worth for inmates to put some time and energy in testing and listening if it betters sound quality. That�s all for now.
      
      Thank you
      fully AOB optimized cMP2 PC -> Lynx AES16 -> XLR AES/EBU -> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300

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