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Re: [Discuss-gnuradio] gr_vmcircbuf_sysv_shm: shmget (1): Invalid argume
From: |
Josh Blum |
Subject: |
Re: [Discuss-gnuradio] gr_vmcircbuf_sysv_shm: shmget (1): Invalid argument |
Date: |
Thu, 10 Feb 2011 20:53:08 -0800 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101208 Lightning/1.0b2 Thunderbird/3.1.7 |
http://gnuradio.org/cgit/gnuradio.git/commit/?h=next&id=649e4387848a5d9273983600be6f35c3e2a88191
Definitely tags related, that change broke it. -josh
On 02/10/2011 12:56 PM, Tom Rondeau wrote:
> On Thu, Feb 10, 2011 at 2:38 PM, Josh Blum <address@hidden> wrote:
>> ./shmget_demo_issue.py -v 1024 -n 2048
>> gr_vmcircbuf_sysv_shm: shmget (1): Invalid argument
>> gr_buffer::allocate_buffer: failed to allocate buffer of size 16392 KB
>> terminate called after throwing an instance of 'std::bad_alloc'
>> what(): std::bad_alloc
>> Aborted
>>
>>
>> So, I have the latest gnuradio next and ubuntu 10.10. This issue crops
>> up whenever I try to run the wxgui fftsink with my usrp2 at full rate,
>> and on several different computers.
>>
>> I have recreated the problem with a simple python app. No message
>> queues, no usrp hardware, no graphics, just core gnuradio blocks.
>> Application attached.
>>
>> null source -> keep one in n -> null sink
>>
>> Basically, increasing the N (decimation) to a high enough number causes
>> this issue consistently. Why should more decimation cause this? Did
>> something in the tags implementation change this behavior? Any ideas?
>>
>> Thanks,
>> -Josh
>
>
> ACK. Thanks for the report and test case. I have no idea what's
> causing it right now, and I really can't see how the tags would have
> interfered.
>
> What happens if you go back to the master or even the 3.3.0 release package?
>
> Tom