Re: [Discuss-gnuradio] gnuradio on ARM: gr_vmcircbuf_sysv_shm: shmat (3): Invalid argument

[Tom Rondeau]

On Tue, Aug 27, 2013 at 10:15 AM, Philip Balister <address@hidden> wrote:
> On 08/27/2013 09:58 AM, Johnathan Corgan wrote:
>> On Tue, Aug 27, 2013 at 6:43 AM, Philip Balister <address@hidden>wrote:
>>
>>
>>> The circular buffer is going to become more and more painful as we try
>>> to do cool stuff with Zynq.
>>>
>>
>> Agree.  This was a good topic of discussion at the last hackfest in
>> Virginia, and I expect there will be a presentation or two at GRCON13 on
>> alternatives when dealing with FPGA and GPU offload architectures.
>>
>
> In the short term, do you know which buffer allocator GNU Radio prefers
> to use? Can we just disable the shm based one?
>
> Philip
>

You can override it in the ~/.gnuradio/prefs/vmcircbuf_default_factory file.

Just put in there the line (with no newline):

gr::vmcircbuf_createfilemapping_factory


And that will tell the system to use that method of managing the
circular buffers.

Though it's supposed to test to see if your system can handle the
shared memory method first before setting this prefs file. So I guess
there's something different on the ARM that's not being tested for
compliance here.

-- 
Tom
Visit us at GRCon13 Oct. 1 - 4
http://www.trondeau.com/grcon13