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