Yeah, I tried changing the maximum shared memory, but that didn't work. I mean, it didn't resolve the problem; I gave it 2147483648 but the error persists. I tried adding a zero to that, but that's an "Invalid Argument."
On Thu, Nov 21, 2019 at 5:17 AM Ron Economos <w...@comcast.net> wrote: > 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: > [image: 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 * > > -- Eamon Heaney *Fleet Commander* *President, Model UN at Virginia Tech*
