> The DDK blob has the ability to mark only certain areas of memory as
> coherent for performance reasons. For simple things like kmscube I would
> expect that it's basically write-only from the CPU and almost all memory the
> GPU touches isn't touched by the CPU. I.e. coherency isn't helping and
On 2020-09-16 18:46, Rob Herring wrote:
On Wed, Sep 16, 2020 at 11:04 AM Alyssa Rosenzweig
wrote:
So I get a performance regression with the dma-coherent approach, even if it's
clearly the cleaner.
That's bizarre -- this should really be the faster of the two.
Coherency may not be free.
On 17/09/2020 11:51, Tomeu Vizoso wrote:
On 9/17/20 12:38 PM, Steven Price wrote:
On 16/09/2020 18:46, Rob Herring wrote:
On Wed, Sep 16, 2020 at 11:04 AM Alyssa Rosenzweig
wrote:
So I get a performance regression with the dma-coherent approach,
even if it's
clearly the cleaner.
That's
On 9/17/20 12:38 PM, Steven Price wrote:
On 16/09/2020 18:46, Rob Herring wrote:
On Wed, Sep 16, 2020 at 11:04 AM Alyssa Rosenzweig
wrote:
So I get a performance regression with the dma-coherent approach,
even if it's
clearly the cleaner.
That's bizarre -- this should really be the
On 16/09/2020 18:46, Rob Herring wrote:
On Wed, Sep 16, 2020 at 11:04 AM Alyssa Rosenzweig
wrote:
So I get a performance regression with the dma-coherent approach, even if it's
clearly the cleaner.
That's bizarre -- this should really be the faster of the two.
Coherency may not be free.
> So I get a performance regression with the dma-coherent approach, even if it's
> clearly the cleaner.
That's bizarre -- this should really be the faster of the two.
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On Wed, Sep 16, 2020 at 11:04 AM Alyssa Rosenzweig
wrote:
>
> > So I get a performance regression with the dma-coherent approach, even if
> > it's
> > clearly the cleaner.
>
> That's bizarre -- this should really be the faster of the two.
Coherency may not be free. CortexA9 had something like
Hi Robin,
On 16/09/2020 01:51, Robin Murphy wrote:
> Hi all,
>
> I polished up my original proof-of-concept a little while back, but now
> that I've got my hands on my Juno again I've been able to actually test
> it to my satisfaction, so here are proper patches!
I tested on the Kkadas VIM3,
