Hi,
I have a problem with insufficent shared memory. I'm running GNU Radio
from SVN, and keep getting these messages:
gr_vmcircbuf_sysv_shm: shmget (1): No space left on device
gr_buffer::allocate_buffer: failed to allocate buffer of size 32 KB
terminate called after throwing an instance of 'std::bad_alloc'
what(): St9bad_alloc
Avbrutt (SIGABRT)
I've tried increasing the maximum size of shared mem blocks with this command:
sysctl -w kernel.shmmax=2147483648
I've attached the block that causes these problems (it will not work
if you try it, because some additional modules are missing). Any hints
on how to solve this?
--
Trond Danielsen
from gnuradio import gr,window
from local_code import local_code
class acquisition(gr.hier_block2):
def __init__(self, fs, fd):
self.fft_size = int( 1e-3*fs)
self.window = window.blackmanharris(self.fft_size)
gr.hier_block2.__init__(self,
"acquisition",
gr.io_signature(1,1,gr.sizeof_gr_complex),
gr.io_signature(1,1, int(self.fft_size * gr.sizeof_float)))
# aliases:
c = lambda i, o, i_p=0, o_p=0: self.connect(i,i_p,o,o_p)
d = lambda n, f: self.define_component( n, f)
# Input signal; get Fourier transform of signal.
d( "s2v_input",
gr.stream_to_vector(gr.sizeof_gr_complex, self.fft_size))
d( "fft_input",
gr.fft_vcc(self.fft_size, True, self.window))
# Local code.
d( "local_code", local_code(svn=1, fs=fs, fd=fd))
# Multiply local code with recv. signal.
d( "mult", gr.multiply_vcc(self.fft_size))
# Invers transform result.
d( "ifft", gr.fft_vcc(self.fft_size, False, self.window))
# Get signal magnitude.
d( "mag", gr.complex_to_mag(self.fft_size) )
d( "v2s", gr.vector_to_stream(gr.sizeof_float, self.fft_size))
# Split vector into N branches for filtering.
d( "one2N", gr.deinterleave(gr.sizeof_float))
# Integrate signal: y(n) = x(n) + x(n-1) + x(n-2)
for i in range(self.fft_size):
d( ( "fir_%d" % i ), gr.fir_filter_fff( 1, [1.0, 1.0, 1.0] ))
# Combine signal again.
d( "N2one", gr.interleave(gr.sizeof_float))
d( "s2v", gr.stream_to_vector(gr.sizeof_float, self.fft_size))
# Connect everything.
c( "self", "s2v_input")
c( "s2v_input", "fft_input")
c( "local_code", "mult")
c( "fft_input", "mult", o_p=1)
c( "mult", "ifft")
c( "ifft", "mag" )
c( "mag", "v2s" )
c( "v2s", "one2N" )
for i in range(self.fft_size):
fir = ("fir_%d" % i )
c( "one2N", fir, i_p=i )
c( fir, "N2one", o_p=i)
c( "N2one", "s2v" )
c( "s2v", "self" )
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