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Slow framebuffer access on real laptop hardware #2

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opened 2022-11-06 23:18:50 -05:00 by josh · 1 comment
josh commented 2022-11-06 23:18:50 -05:00
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Scrolling the console is way too slow on physical hardware. Main thing to check is MTRR/PAT configuration. But also perhaps implement double-buffering to avoid reading from video memory.

Scrolling the console is way too slow on physical hardware. Main thing to check is MTRR/PAT configuration. But also perhaps implement double-buffering to avoid reading from video memory.
josh commented 2022-11-08 06:23:34 -05:00
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Implemented double buffering which sped up access quite a bit since I'm no longer reading from video memory. However, writing to the framebuffer is still far slower than I would prefer. Will still check MTRR/PAT and whether cache is fully enabled.

Implemented double buffering which sped up access quite a bit since I'm no longer reading from video memory. However, writing to the framebuffer is still far slower than I would prefer. Will still check MTRR/PAT and whether cache is fully enabled.
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Reference: josh/hos#2