linuxaudio.org

--e89a8fb1ef14ecd6d904c6473ead

Content-Type: text/plain; charset=ISO-8859-1
Hi all,
I've working on a LV2 instrument plugin, and it consumes about 1-2% CPU on

idle. When I leave it for about 20 seconds, the CPU usage jumps to 38 / 40

% of a core, and JACK xruns. The code contains IIR's for a reverb effect,

so I'm going to blame this CPU burning on denormal values.
I'm using waf as the build system, and appending "-O3" and "-ffast-math" to

the CFLAGS and CXXFLAGS. Building with ./waf -v shows the runner thread to

have the "-O3" and "-ffast-math" in the command.

Yet when I run it it still hogs CPU after about 10-20 seconds.
Reading on gcc's pages (http://www.acsu.buffalo.edu/~charngda/cc.html) tells

me that if DenomalsAreZero and FlushToZero are set, it should be linked

with crtfastmath.o. I don't know how to check if this is happening?
I'm not sure where to look next to fix the problem. Help appreciated!

-Harry
--e89a8fb1ef14ecd6d904c6473ead

Content-Type: text/html; charset=ISO-8859-1

Content-Transfer-Encoding: quoted-printable
Hi all,I've working on a LV2 instrument plugin, and=

 it consumes about 1-2% CPU on idle. When I leave it for about 20 seconds, =

the CPU usage jumps to 38 / 40 % of a core, and JACK xruns.=A0The code cont=

ains IIR's for a reverb effect, so I'm going to blame this CPU burn=

ing on denormal values.

I'm using waf as the build system, and appending &q=

uot;-O3" and "-ffast-math" to the CFLAGS and CXXFLAGS. Build=

ing with ./waf -v shows the runner thread to have the "-O3" and &=

quot;-ffast-math" in the command.

Yet when I run it it still hogs CPU after about 10-20 seconds.Reading on gcc's pages (http://www.acsu.buffalo.edu/~charngda/cc.html<=

/a>)=A0tells me that if DenomalsAreZero and FlushToZero are set, it should =

be linked with crtfastmath.o.=A0I don't know how to check if this is ha=

ppening?

I'm not sure where to look next to fix the problem.=

 Help appreciated!-Harry

--e89a8fb1ef14ecd6d904c6473ead--