(ITS#5364) Thread pool efficiency

Full_Name: Hallvard B Furuseth Version: HEAD OS: URL: http://www.openldap.org/lists/openldap-devel/200802/msg00003.html Submission from: (NULL) (129.240.203.232) Submitted by: hallvard

ITS filed for the changes in thread "Thread pool efficiency", openldap-devel, Feb 2008.

slapd spends too much time contending for ltp_mutex in the thread pool (libldap_r/tpool.c).

Applying some easy fixes first: Move work out of the region where pool_submit() and pool_wrapper hold the mutex locked. Also slapd/result.c checks if the pool is paused every 64 entries and if so returns LDAP_BUSY, it needs no lock for that.