Keith Medcalf wrote: > > Indeed turning off memstatus leads to a 500% (from ~3s to ~0.5s) performance > increase. > Changing the threading mode or the indirection level of the mutexes calls > seems to have no significant effect. > Goes to show - publishing benchmark results without investigating why they are what they are is mostly pointless. When you suspect mutex contention is a significant factor, you should use something like mutrace to confirm your suspicion first.
Fundamentally there ought to be no performance difference between running a 64-threaded server on a 64-threaded CPU vs 64 single-threaded processes. In practice, the single process with 64 threads ought to be slightly faster, due to less context switch overhead between threads, but if nothing else in the system is contending for CPU then context switching shouldn't even be an issue. -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/ _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
