[directmusic] Re: Mem usage
- From: "Scott Morgan" <scott@xxxxxxxxxxxxxxxxx>
- To: <directmusic@xxxxxxxxxxxxx>
- Date: Sun, 29 Sep 2002 18:30:44 -0500
Make sure the wave is set as a streaming wave. It helps to check 'don't
pre-roll' also.
The wave data will be uncompressed when it is loaded, but if its streaming
it shouldn't be that big of a deal. I notice about 1MB usage for one
streaming wave.
An 11MB container shouldn't use 22 MB unless you have a a bunch of buffers
in your audiopath and are using DMOs (especially mutiple reverbs and sends).
Hope that helps,
-Scott Morgan
http://Morganstudios.com
----- Original Message -----
From: "Aaron R Leiby" <aleiby@xxxxxxxxxxxxx>
To: <directmusic@xxxxxxxxxxxxx>
Sent: Sunday, September 29, 2002 5:58 PM
Subject: [directmusic] Mem usage
>
> Using my most scientific method of the TaskManager to track memory usage,
> I'm noticing that with just a simple direct music script calling an empty
> segment (tracks - tempo/timesig/wave/script), I'm getting about 2MB boost
in
> memory use (the container file itself is 1.46kb). When I have a container
> (similar structure) just with more segments, and actual wav data
> (compressed), whose container weighs in at 3.08MBs, I'm seeing a 9MB boost
> in memory use when I start the script (which includes initializing DM,
> etc.). Our largest container weighs in at a hefty 11.5MBs, and results in
> over 22MBs increase memory use. (Memory usage appears to fluctuate +/-
2MBs
> over the course of playing.)
>
> A) Does this sound right?
>
> B) What are some methods for reducing this?
>
> Some data points:
>
> o We're using VBScript for the scripts (since they use select statements,
> rand, global vars, etc.).
> o Wav files are compressed using only Microsoft ADPCM. We are shipping
with
> simple streaming ogg vorbis music for much of the game, so it may be worth
> me spending time to hook up similar compression for DM use?
> o Wav files are set Streaming with 500ms read ahead.
> o Script is flagged with "Load all content when script is loaded" --
> disabling this causes errors (apparently there is no automatic load on
> demand support and something the application writer is expected to
> provide?).
> o Script is flagged with "Download all segments when script is loaded".
>
> Ideally, I'd like to only incur a fixed overhead for initializing
> DirectMusic, a small overhead for loading all the segment info, script,
etc.
> (structure stuff), and then whatever is required for the streaming wav
pool
> (which I would expect to be the largest overhead, but certainly not an
order
> of magnitude larger than the source material).
>
>
> Thanks,
>
> Aaron.
>
>
>
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