[PD-dev] alignment of signal vectors

[Thomas Grill]

Hi all,
back in Pd 0.37 or so, i have made a branch with explicitly aligned DSP vector allocation and respective gcc attributes for aligned pointers and some changes to DSP processing (integer loop counters instead of pointer incrementation), which makes it easier for compilers to generate vectorized code.
There was some significant performance increase, but it has not found its way into vanilla pd. I am all for a similar PR these days.
best, Thomas

> Am 02.07.2018 um 23:04 schrieb Claude Heiland-Allen <claude at mathr.co.uk>:
> 
> Hi,
> 
> Is there any guarantee about alignment of signal vector data?
> 
> If not, should there be, in the future?
> 
> Or should one conditionally `dsp_add()` their specific-alignment-needing kernels dependent on what the `dsp` method actually gets?
> 
> Context:
> 
> In some code unrelated to Pd, using GCC vector intrinsics (not CPU-specific) I got a near-2x speed boost by recompiling the same code to target a newer CPU, vs the binary compiled for an older CPU.
> 
> The old idea of compiling a machine-specific math~.pd_linux (or whatever) to speed up everything by overwriting internal objects is also on my mind.
> 
> Thanks,
> 
> Claude
> -- 
> https://mathr.co.uk
> 
> 
> _______________________________________________
> Pd-dev mailing list
> Pd-dev at lists.iem.at
> https://lists.puredata.info/listinfo/pd-dev

--
Thomas Grill
http://grrrr.org