[linux-audio-dev] Re: Fixing Freeverb and Denormals

[Steve Harris]

On Sat, Jan 22, 2005 at 11:22:41AM +0000, Neil Klepeis wrote:
> Hi,
> 
> I compiled the CMT plugins with the g++ options -msse2 and -march=i686 
> and the freeverb denormals problem (seen with ardour on a dual Xeon 
> machine) seems to be _almost_ entirely fixed.  Also, I don't see any 
> weird problems with the ardour host (yet :).   But, I still see the DSP 
> load increasing from around 5% to about 15%, although now it is _much_ 
> farther along in the tails of the reverb than before and I get _zero_ 
> xruns.  [before, the DSP shot up to 60-90% with tons of xruns and 
> usually the zombification of ardour].

right, with SSE you still get denormals, they just cost less. I've posted
some code in the past that turns of denormal handling in SSE.

- Steve