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Re: large scale (audio) file I/O on OS X : help or insight requested
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Re: large scale (audio) file I/O on OS X : help or insight requested

  • Subject: Re: large scale (audio) file I/O on OS X : help or insight requested
  • From: Paul Davis <email@hidden>
  • Date: Thu, 12 Mar 2015 17:56:29 -0500


On Thu, Mar 12, 2015 at 12:10 AM, Hamilton Feltman <email@hidden> wrote:

Logic is background caching as soon as the song is opened? You could test this by closing logic, clearing the file cache, opening logic and immediately starting playback while watching the trace. If it’s still reading in 64kb blocks, it’s going to stall, there are no two ways about it.

No, the dtrace output (from iosnoop and hfsnoop) shows a kernel process regularly doing 64kB I/O to a variety of unidentified files.
 
More results tomorrow, after another night pondering what we've seen today.




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References: 
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)

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