Re: [Discuss-gnuradio] Oprofile from a flow graph running on an OMAP3

[Eric Blossom]

On Sat, Oct 11, 2008 at 02:38:28PM -0400, Philip Balister wrote:
> From gnuradio running on the Beagle. The flow graph is the one I
> posted earlier, except fed real data.
> 
> Anyone know what the std::vector<float, std::allocator<float>
> >::operator[](unsigned int) call does?  I guess it is time to hack
> some NEON into the generic FIR fiilter code.

I think that's just a sampling artifact of the inlined foo[x].  
I'm pretty sure it's spending time 55% of the time in
gr_fir_fff_generic::filter.

You may want to try gr.fft_filter_fff instead.

Eric



> Philip
> 
> address@hidden:~# opreport -l --threshold=1
> CPU: ARM V7 PMNC, speed 0 MHz (estimated)
> Counted CPU_CYCLES events (Number of CPU cycles) with a unit mask of
> 0x00 (No unit mask) count 100000
> samples  %        app name                 symbol name
> 244      32.2751  libgnuradio-core.so.0.0.0
> gr_fir_fff_generic::filter(float const*)
> 167      22.0899  libgnuradio-core.so.0.0.0 std::vector<float,
> std::allocator<float> >::operator[](unsigned int)
> 80       10.5820  vmlinux-2.6.27-rc7-omap1 generic_interrupt
> 46        6.0847  libgnuradio-core.so.0.0.0 gr_fast_atan2f(float, float)
> 39        5.1587  libgnuradio-core.so.0.0.0 .plt
> 36        4.7619  vmlinux-2.6.27-rc7-omap1 schedule
> 13        1.7196  vmlinux-2.6.27-rc7-omap1 handle_IRQ_event
> 11        1.4550  vmlinux-2.6.27-rc7-omap1 vfp_notifier
> 10        1.3228  libgcc_s.so.1            __mulsc3
> 10        1.3228  vmlinux-2.6.27-rc7-omap1 thumbee_notifier
> 8         1.0582  vmlinux-2.6.27-rc7-omap1 mmc_omap_start_command