Re: GPU tests on master next - core-image-x11 - sfp

[Daiane Angolini <daiane.angolini@freescale.com>]

On 08/29/2013 05:01 AM, Alexandre Belloni wrote:
> Hi,
>
> On 28/08/2013 22:27, Eric Bénard wrote:
>>
>> on the GPU point of view no.
>>
>> I find interesting that the hardfp gives lower results than the
>> softfp : maybe that would be interesting to have true real life
>> benchmarks on this side (not GPU centric) before defaulting hardfp in
>> meta-fsl-arm for i.MX6 platforms.
>
> I'm not sure we can actually find real life benchmarks, it always
> depends on how intensive are the floating point operation compared to
> the rest of the system.
>
> Also, I remember seeing that the difference between softfp and hardfp is
> not as big on cortex-a9 as on cortex-a8. Actually, softfp is already
> using the VFP but using the soft ABI. Then, it has to copy values from
> integer registers to float registers and that is the overhead. This
> overhead is lower on cortex-a9 because the vfp is pipelined, this was
> not the case on cortex -a8.
>
> You can find interesting benchs here:
>
> https://wiki.linaro.org/OfficeofCTO/HardFloat/Benchmarks
> https://wiki.linaro.org/OfficeofCTO/HardFloat/Benchmarks201205

sweet

>
>


-- 
Daiane