cbc10fd311
page_size is used in every nearly every pointer calculation in os.rs, and the Stack methods are called fairly often. It's definitely not worth spilling registers for to call out to a libc function. With this change, page_size becomes effectively free. It is cached in an atomic usize, with relaxed ordering, so no actual atomic operations are involved. Benchmark: ``` test bench_page_size ... bench: 5 ns/iter (+/- 1) test bench_page_size_cached ... bench: 0 ns/iter (+/- 0) ``` |
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| .. | ||
| debug | ||
| sys | ||
| arch.rs | ||
| context.rs | ||
| init.s | ||
| lib.rs | ||
| os.rs | ||
| stack.rs | ||
| swap.s | ||