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A comment on RAM now represents 35 percent of bill of materials for HP PCs. Parent comment

Re:RAM now represents 35 percent of bill of materials for HP... by david-gpu on Thursday February 26, 2026 @08:11AM (#47165589)
> you don't actually want to force the decision of what is in the cache back to compile time, when the relevant information is better available at runtime

That is very context-dependent. In high-performance code having explicit control over caches can be very beneficial. CUDA and similar give you that ability and it is used extensively.

Now, for general "I wrote some code and want the hardware to run it fast with little effort from my side", I agree that transparent caches are the way.

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Re:RAM now represents 35 percent of bill of materials for HP... by 10000truths on Thursday February 26, 2026 @08:51AM (#47166081)
x86 provides this control with non-temporal load/store instructions.
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Re:RAM now represents 35 percent of bill of materials for HP... by convolvatron on Thursday February 26, 2026 @10:06AM (#47167094)
that solves the pollution problem, but it doesn't pin cache lines. it also doesn't cover the case that ppc does where you want to assert a line is valid without actually fetching.
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