tree 44b5dd5bdef7c8f601ee6ec54ed4220dc6568269
parent cd10def825119900cfd5d87f6a48e5282679e95a
author Willy Tarreau <w@1wt.eu> 1602953718 +0200
committer Willy Tarreau <w@1wt.eu> 1602954267 +0200
encoding latin1

MINOR: lb/map: use seek lock and read locks where appropriate

- map_get_server_hash() doesn't need a write lock since it only
  reads the array, let's only use a read lock here.

- map_get_server_rr() only needs exclusivity to adjust the rr_idx
  while looking for its entry. Since this one is not used by
  map_get_server_hash(), let's turn this lock to a seek lock that
  doesn't block reads.

With 8 threads, no significant performance difference was noticed
given that lookups are usually instant with this LB algo so the
lock contention is rare.