* RCU Judy Array (optimisation over Radix Tree)
@ 2016-08-24 20:39 Mathieu Desnoyers
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From: Mathieu Desnoyers @ 2016-08-24 20:39 UTC (permalink / raw)
To: Matthew Wilcox; +Cc: Paul E. McKenney, linux-kernel, rp
Hi Matthew,
Following our discussion at LinuxCon about Radix Trees and Judy
Array, here is a pointer to my user-space implementation
prototype of RCU Judy Array. I've simplified it a bit (removing
features you don't need, just keeping fixed-sized integer keys),
and it can still be simplified quite a bit by removing partitioned
locking support, but it may contain nice ideas for radix tree
improvements regarding the number of cache-lines touched by radix
tree lookups.
It's available in this branch:
https://github.com/urcu/userspace-rcu/tree/urcu/rcuja-simple-int
Here are Linux Plumbers 2012 slides and video from a few years ago:
http://www.efficios.com/lpc2012-scaling-rcu-judy-arrays-cache-efficient-compact-fast-and-scalable-trie
Feedback is welcome!
Thanks,
Mathieu
--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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