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Re: Safety Offset (Was: I/O Latency (Was: Layman with a mission))
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Re: Safety Offset (Was: I/O Latency (Was: Layman with a mission))


  • Subject: Re: Safety Offset (Was: I/O Latency (Was: Layman with a mission))
  • From: Herbie Robinson <email@hidden>
  • Date: Thu, 14 Oct 2004 16:35:47 -0400

At 12:11 PM -0700 10/14/04, Jeff Moore wrote:
Because it's not an exact science, driver writers need to examine their requirements carefully and do some profiling and experimentation to figure out the best number to report as the safety offset for their hardware.

Actually, for decent hardware, the optimum value is probably going to vary quite a lot depending on the CPU speed and the number of CPUs.


Also, note that applications must have more buffers to do any of the following:

1.  Support multiple interfaces.

2.  Support audio processing on multiple CPUs (networked or local).

This is because they won't be able to do all the processing in a single callback.
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  • Follow-Ups:
    • Re: Safety Offset (Was: I/O Latency (Was: Layman with a mission))
      • From: Jeff Moore <email@hidden>
References: 
 >Re: I/O Latency (Was: Layman with a mission) (From: William Stewart <email@hidden>)
 >Re: I/O Latency (Was: Layman with a mission) (From: Philippe Wicker <email@hidden>)
 >Re: Safety Offset (Was: I/O Latency (Was: Layman with a mission)) (From: Jeff Moore <email@hidden>)

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