Alex Kogan's on July 16, 2019 5:25 am:

Our evaluation shows that CNA also improves performance of user 
applications that have hot pthread mutexes. Those mutexes are 
blocking, and waiting threads park and unpark via the futex 
mechanism in the kernel. Given that kernel futex chains, which
are hashed by the mutex address, are each protected by a 
chain-specific spin lock, the contention on a user-mode mutex 
translates into contention on a kernel level spinlock. 

What applications are those, what performance numbers? Arguably that's
much more interesting than microbenchmarks (which are mainly useful to
help ensure the fast paths are not impacted IMO).

Thanks,
Nick

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