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Re: [Discuss-gnuradio] oprofile callgraph question
From: |
Charles Swiger |
Subject: |
Re: [Discuss-gnuradio] oprofile callgraph question |
Date: |
Sat, 21 Jun 2008 11:01:22 -0400 |
On Fri, 2008-06-20 at 13:45 -0700, Eric Blossom wrote:
> considerably more up-to-date than that in 3.1.1. Chuck Swiger has
> been working on it.
>
> Eric
Ah, I still need to check in the complex pll stuff that gets rid of
> gr_freq_xlating_fir_filter_ccf 2.68%
and allows the pll to run at 16MHz instead of 19.2MHz. An open question
(beyond me at the moment) is what are the optimal interpolator taps in
the bit_timing_loop for 16MHz? I'll check in what I have and people can
work with the taps since they are elsewhere in gnuradio-core. I made
some taps:
static const int NTAPS = 12;
static const int NSTEPS = 128;
static const double BANDWIDTH = 0.25;
that work but that's just 'twiddling knobs and got a picture' , I can't
rigorously prove those are the best numbers ;)
Using cpll the oprofile top 10 looks like:
samples % app name symbol name
535275 24.5581 _atsc.so
atsci_equalizer_lms::filter1(float const*)
467354 21.4419 libgnuradio-core.so.0.0.0 .loop1
277648 12.7383 _atsc.so
atsci_single_viterbi::decode(float)
246879 11.3267 libgnuradio-core.so.0.0.0 .loop1
64547 2.9614 libgnuradio-core.so.0.0.0 gr_fast_atan2f(float, float)
40527 1.8594 libgnuradio-core.so.0.0.0 decode_rs_char
40256 1.8469 libgnuradio-core.so.0.0.0
gr_single_pole_iir<std::complex<float>, std::complex<float>,
double>::filter(std::complex<float>)
36013 1.6523 _atsc.so atsc_cpll::work(int,
std::vector<void const*, std::allocator<void const*> >&,
std::vector<void*, std::allocator<void*> >&)
31789 1.4585 libm-2.6.so __ieee754_rem_pio2f
29662 1.3609 libm-2.6.so sincosf
--Chuck
- [Discuss-gnuradio] oprofile callgraph question, Mikyung Han, 2008/06/20
- Re: [Discuss-gnuradio] oprofile callgraph question, Eric Blossom, 2008/06/20
- Re: [Discuss-gnuradio] oprofile callgraph question, Eric Blossom, 2008/06/23
- Re: [Discuss-gnuradio] oprofile callgraph question, Mikyung Han, 2008/06/23
- Re: [Discuss-gnuradio] oprofile callgraph question, Mikyung Han, 2008/06/23
- Re: [Discuss-gnuradio] oprofile callgraph question, Eric Blossom, 2008/06/23
- Re: [Discuss-gnuradio] oprofile callgraph question, Mikyung Han, 2008/06/23
- Re: [Discuss-gnuradio] oprofile callgraph question, Eric Blossom, 2008/06/23
- Re: [Discuss-gnuradio] oprofile callgraph question, Eric Blossom, 2008/06/23