You must be running an older kernel that doesn't set kernel.shmmax to
some large value.
To check the current setting:
sysctl kernel.shmmax
To set it higher:
sudo -w kernel.shmmax=2147483648
Ron
On 11/21/19 01:59, Eamon Heaney wrote:
I'm running the sample wifi_tx.grc flowchart from gr-ieee802.11,
substituting a null sink for the USRP sink to test it.
When I try to run it, it fails with the following error message:
"
>set_min_output_buffer on block 7 to 207744
>set_min_output_buffer on block 9 to 2077440
>set_min_output_buffer on block 11 to 2077440
>set_min_output_buffer on block 12 to 207744
>set_min_output_buffer on block 13 to 415488
>set_min_output_buffer on block 14 to 207744
>set_min_output_buffer on block 26 to 262144
>set_min_output_buffer on block 27 to 96000
>set_min_output_buffer on block 31 to 100000
>gr::vmcircbuf_mmap_shm_open: mmap (1): Cannot allocate memory
>gr::buffer::allocate_buffer: failed to allocate buffer of size 1038720 KB
>gr::vmcircbuf_mmap_shm_open: mmap (1): Cannot allocate memory
>gr::buffer::allocate_buffer: failed to allocate buffer of size 1038720 KB
>Traceback (most recent call last):
> File "/home/vtti/working/wifi_tx.py", line 297, in <module>
> main()
> File "/home/vtti/working/wifi_tx.py", line 276, in main
> tb.start()
> File
"/usr/local/lib/python3.6/dist-packages/gnuradio/gr/top_block.py",
line 111, >in start
> top_block_start_unlocked(self._impl, max_noutput_items)
> File
"/usr/local/lib/python3.6/dist-packages/gnuradio/gr/runtime_swig.py",
line >5828, in top_block_start_unlocked
> return _runtime_swig.top_block_start_unlocked(r, max_noutput_items)
>RuntimeError: std::bad_alloc
"
Here's a picture of my flowchart:
gnuradio-runtimeError-bad_alloc.png
Tested this on a different machine, and it works fine, so the problem
isn't with the flowchart itself. I'm working off the maint-3.8 branch,
installed from source.
Any idea why I'm getting this error, or how I could resolve it? Thanks!
--
Eamon Heaney
/
/Fleet Commander/
//
/President, Model UN at Virginia Tech/
/
