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

From: Maxim S. Shatskih (maxim_at_storagecraft.com)
Date: 10/28/04 

Date: Thu, 28 Oct 2004 17:42:54 +0400

    More so, I know of RTP receiver (virtual microphone) implementation which
is purely user mode, based on WINMM and works fine. No hooking is used either. 

-- 
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com
"Doron Holan [MS]" <doronh@nospam.microsoft.com> wrote in message
news:eJGU9ULvEHA.1988@TK2MSFTNGP12.phx.gbl...
> 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
>
> -- 
> Please do not send e-mail directly to this alias. this alias is for
> newsgroup purposes only.
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
>
> "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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