On 24/08/2023 21:37, Eduardo Hopperdietzel wrote:
The results show that there's no significant difference in the time it takes for read and write operations using QPainter in SHM and DMA maps.
I'm really curious here, and these aren't rhetorical questions: why would anyone expect to be a difference in performance, as far as QPainter is concerned? Isn't it ultimately just using a CPU-based renderer onto a block of memory? Why should it make a difference where that memory comes from / how it's managed / etc.? Are we're talking about "far memory" (NUMA-like) scenarios?
Thank you, -- Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB (France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com KDAB - The Qt, C++ and OpenGL Experts
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