arcs_mtx contention

Matthew Ahrens

2013-09-22 04:59:36 UTC

I have seen contention on arcs_mtx before. To validate that the changes
help, it would be good to see lockstat (or equivalent) data before + after,
and a description of the workload.

--matt

Post by Andriy Gapon
https://github.com/freebsd/freebsd/commit/bd31c2114d0cea1dffaf1b3a492f7da38e6c1086
The change contains a few unrelated things, but I am interested only in the
pieces related to splitting of arcs_mtx into arcs_locks and arcs_list into
arcs_lists and arc_evict modifications.
Has anybody noticed substantial contention on arcs_mtx?
Does this change has a merit, in your opinion?
Thank you!
--
Andriy Gapon
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