You've given me an idea. The slow part of microkernels, and the slow part of pre-emptive multitasking, have the same cause: context switching is comparatively slow. You have to invalidate the cache and let it refill, and you have to load new settings into the MMU.
Now I want to look into ways to reduce that slowness. There's a way for the cache: cache by physical rather than virtual addresses. SPARC did that, I think. As for the MMU, I don't know, but I want to find out.
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timeasmymeasure
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Date: 2024-03-24 05:53 pm (UTC)Now I want to look into ways to reduce that slowness. There's a way for the cache: cache by physical rather than virtual addresses. SPARC did that, I think. As for the MMU, I don't know, but I want to find out.