Re: [Discuss-gnuradio] Invalid Argument/Failed to Allocate Buffer

[Ian Buckley]

Paul, I read that as lack of available shared memory. I'm curious what result you get if you run the following at the command line:

sysctl kernel.shmmax 

Not sure how you installed gnu radio, but if you used Marcus's build_gnuradio script then the following changes should have been made in /etc/sysctl.conf:

# Updates for Gnu Radio
net.core.rmem_max = 1000000
net.core.wmem_max = 1000000
kernel.shmmax = 2147483648

These would be considered good starting values for general GNUradio with a USRP work.

You can experiment at the command line to see if it solves your issue with:

sudo sysctl -w kernel.shmmax=2147483648

-Ian

On Nov 21, 2013, at 3:17 PM, Paul B. Huter <address@hidden> wrote:

I am trying to play back my recorded data and I get the following:

3 instances of vmcircbuf_sysv_shm: shmget(1): Invalid argument

allocate_buffer: failed to allocate buffer size of 25784 KB

Those four lines are repeated, then

terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_aloc

My flow is a file source to a throttle to a frequency xlating fir filter to a wx gui fft sink. Sample rate is 50M.

Any ideas?

Paul B. Huter

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