On Wed, Jul 13, 2011 at 1:40 AM, Riadh Elloumi <riadh.ello...@parrot.com> wrote: > Hi all, > > I complied DAB demodulation for ARM Cortex-A8 (TI OMAP 3). It > successfully demodulate DAB+ but spends 13 seconds decoding 1 second of > radio baseband (USRP file).
I tested the demodulator with similar results. Decoding a file that takes a few seconds on my desktop takes over a minute on the ARM. > Why is gnu radio too slow demodulating DAB+? Do you have some figures of > CPU consumption on ARM Cortex cores? Is there some optimization I missed > for the platform? The performance limitation in this case largely comes from floating point math performance, though that's a vague and not particularly useful conclusion. OProfile report: http://ttsou.github.com/gnuradio/dab_demod_oprof.txt OProfile report with symbols: http://ttsou.github.com/gnuradio/dab_demod_symbols.txt Thomas Profiling through timer interrupt TIMER:0| samples| %| ------------------ 3542 28.4727 libm-2.12.2.so 2976 23.9228 libgnuradio-core-3.4.1git.so.0.0.0 1637 13.1592 no-vmlinux 1151 9.2524 libgcc_s.so.1 1130 9.0836 libgnuradio-dab-3.3.0.so.0.0.0 758 6.0932 libfftw3f.so.3.2.4 549 4.4132 libc-2.12.2.so 407 3.2717 libpthread-2.12.2.so 120 0.9646 libpython2.6.so.1.0 82 0.6592 libboost_thread.so.1.45.0 72 0.5788 python TIMER:0| samples| %| ------------------ 72 100.000 [vectors] (tgid:8032 range:0xffff0000-0xffff1000) 6 0.0482 ld-2.12.2.so 5 0.0402 busybox 3 0.0241 time.so 2 0.0161 oprofiled Thomas _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
