On Sun, Sep 06, 2020 at 09:00:02PM +0000, Zidenberg, Tsahi wrote: > These results show only about 6% performance increase in simple-update, and > very close > performance in other results, most of which could be attributed to benchmark > result jitter. > These results from "well behaved" benchmarks do not show the full importance > of using > outline-atomics. I have observed in some experiments with other values and > larger systems > a crush of performance including read-only tests, which was caused by > continuously failing to > commit strx instructions. In such cases, outline-atomics improved performance > by more > than 2x factor. These cases are not always easy to replicate.
Interesting stuff. ARM-related otimizations is not something you see a lot around here. Please note that your latest patch fails to apply, could you provide a rebase? I am marking the patch as waiting on author for the time being. -- Michael
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