Re: [Discuss-gnuradio] how to remove/suppress gr_buffer::allocate_buffer: warning:

[Martin Braun]

On Fri, Jun 17, 2011 at 05:08:31PM +0200, Johannes Schmitz wrote:
> Hello Martin,
> I will check my code to find out why it is so big.
> 
> Is there an easy way to somehow suppress this warning in case I am
> willing to ignore it?

Not without changing the code
(gnuradio-core/src/lib/runtime/gr_buffer.cc). Of course, you can
redirect stderr if you're sure nothing else is going wrong.

MB
> 
> Johannes
> 
> 2011/6/17 Martin Braun <address@hidden>:
> > On Fri, Jun 17, 2011 at 03:42:07PM +0200, Johannes Schmitz wrote:
> >> I am getting the following warning when running my script:
> >>
> >> gr_buffer::allocate_buffer: warning: tried to allocate
> >>    4 items of size 88192. Due to alignment requirements
> >>    32 were allocated.  If this isn't OK, consider padding
> >>    your structure to a power-of-two bytes.
> >>    On this platform, our allocation granularity is 4096 bytes.
> >>
> >> Can somebody tell me how to solve this problem or suppress this warning?
> >>
> >> I found it has to do something with fft-size that is not power of 2..
> >
> > Buffers between blocks are always an integer multiple of the
> > item-size (in your case 88192) and 4096. The LCM of 88192 and 4096
> > is pretty large, and tadaa, you get a warning.
> >
> > It's just a warning. If everything works fine... just ignore it. But
> > it's a waste of memory. If you want to optimize this, change your
> > itemsize. You will normally have to adapt the way the data is handled,
> > e.g., you could pad the input to 90112=22*4096 and then discard
> > 90112-88192=1920 Bytes of every input vector.
> >
> > Personally, I usually just ignore it, since it rarely turns up in less
> > unusual applications.
> >
> > MB
> >
> > --
> > Karlsruhe Institute of Technology (KIT)
> > Communications Engineering Lab (CEL)
> >
> > Dipl.-Ing. Martin Braun
> > Research Associate
> >
> > Kaiserstraße 12
> > Building 05.01
> > 76131 Karlsruhe
> >
> > Phone: +49 721 608-43790
> > Fax: +49 721 608-46071
> > www.cel.kit.edu
> >
> > KIT -- University of the State of Baden-Württemberg and
> > National Laboratory of the Helmholtz Association
> >
> >

-- 
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin Braun
Research Associate

Kaiserstraße 12
Building 05.01
76131 Karlsruhe

Phone: +49 721 608-43790
Fax: +49 721 608-46071
www.cel.kit.edu

KIT -- University of the State of Baden-Württemberg and
National Laboratory of the Helmholtz Association

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