John Brooks acb2a9bede Tweak avtab hash table parameters for better performance ... Using the Fedora 20 targeted policy, running check_assertions requires an avtab with around 22 million elements. With the default limit of 4096 buckets, performance is abysmal: it takes more than an hour to populate the hash. Profiling shows most of that time under avtab_search_node. This patch increases the hash from 13 to 20 bits and to a maximum of 1048576 buckets. The time for check_assertions on that policy is reduced to about 3 minutes, which is enough to re-enable those checks as part of the build process. A full size table will allocate 4-8 MB of memory, up from 16-32 KB. In a cursory review, these tables are usually short-lived and only 1-3 are allocated together. Compared to the cost of entries in this table (up to 1 GB using the same policy), this isn't a significant increase. Signed-off-by: John Brooks <john.brooks@jolla.com>		2015-01-15 10:44:01 -05:00
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sepol	Tweak avtab hash table parameters for better performance	2015-01-15 10:44:01 -05:00
Makefile	libsepol: build cil into libsepol	2014-08-26 08:03:31 -04:00