Re: Problems wth my own User Mode WDM Audio Driver on Windows 2003

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From: Doron Holan [MS] (doronh_at_nospam.microsoft.com)
Date: 10/28/04 

Date: Wed, 27 Oct 2004 23:13:25 -0700

just because you are running in kernel mode does not mean that you have
better performance or that your priority is boosted. you may see
improvements by handling i/o completion at dispatch level without having to
wait for the return to passive level, but for what you describe, running
purely in user mode would not have any penalties.

d 

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"Kishore" <Kishore@discussions.microsoft.com> wrote in message 
news:DE584D0E-E8F1-44BA-ACDD-A93C60166070@microsoft.com...
> Kernel mode gives better performance and real time clock
>
> "Guillaume" wrote:
>
>> Maxim S. Shatskih wrote:
>> >>Would kernel mode provide better performance?  Purely academic on my 
>> >>part.
>> >
>> >
>> > For audio, this is not a point anyway. The data flow is too small.
>>
>> Is it? Depends. 6 channels of 24-bit audio @192 kHz requires a very
>> steady data flow of about 3.3 MBytes/s. Not huge, but not what I call
>> too small either, considering the data must be provided without any
>> hitch.
>>

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