Messages in this thread | | | Subject | Re: [RFC PATCH 0/3] staging: remove fbdev drivers | From | Gerd Hoffmann <> | Date | Tue, 13 Dec 2016 08:33:24 +0100 |
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Hi,
> The acceleration that most of the 2D things provide isn't ever that > great, and shadowing is a lot more effective if done properly.
That is probably true for anything pci-ish, because those devices are optimized for memory writes and reads are horribly slow. So you surely want avoid device memory reads and shadowing is a effective way to do this.
On arm hardware the tradeoff may look quite different, the cpus are relatively slow and I think most arm gpus don't have dedicated device memory ...
cheers, Gerd
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