[Openal-devel] OpenALsoft CPU usage?

[Chris Robinson]

On Monday 25 May 2009 10:27:37 am bugs buggy wrote:
> Hey all,
>
> One of our members was doing some tests with openALsoft, and he came
> up with this:
> ---
> I also did some more testing with the OpenALsoft versions from 1.0 to 1.7.
> A driver lockup ate the exact results, but it looked somewhat like this:
>
> 1.0 ~22%
> 1.1 ~22%
> 1.2 ~22%
> 1.3 ~11%
> 1.4 ~13%
> 1.5 ~15%
> 1.6 ~44%
> 1.7 ~51%
>
> So 1.3 was the best, 1.4 and 1.5 got a bit worse, and 1.6 and 1.7 got a lot
> worse
> ---
>
> We are using openAL for our game here:
> http://sourceforge.net/projects/warzone2100/
>
> And I was just curious why the wide range of CPU usage between versions?
>
> The platform that has this issue is linux.

Interesting. I wouldn't have expected OpenAL Soft to create such a large 
difference between versions. Were these tests done on the same system with the 
same configuration? What is the system's and OpenAL Soft's configuration? The 
more info you can provide, the better. :)

The biggest increases in CPU consumption I'd have expected to happen from the 
inclusion of EFX (which happened around 1.2 or 1.3), the multi-channel 
remixing (1.7), or the multiple sends/slots (GIT), which doesn't line up with 
those numbers very well..