tree cb37fa81eaf2ddba084655b0233ff09d66658cee
parent ccea3c54f4b39774ccb48cfd604a22acb8e59c86
author Willy Tarreau <w@1wt.eu> 1613565204 +0100
committer Willy Tarreau <w@1wt.eu> 1613639205 +0100
encoding latin1

OPTIM: server: switch the actconn list to an mt-list

The remaining contention on the server lock solely comes from
sess_change_server() which takes the lock to add and remove a
stream from the server's actconn list. This is both expensive
and pointless since we have mt-lists, and this list is only
used by the CLI's "shutdown server sessions" command!

Let's migrate to an mt-list and remove the need for this costly
lock. By doing so, the request rate increased by ~1.8%.