apc improvements

Hi, I've tested apc in one of my apaches, and I've got this results: context switches (from vmstat) w/out apc: 4k/sec with apc: 200k/sec running processes (from 'vmstat 1') w/out apc: 0-9 with apc: 20-100 Cpu usage with aps: 30% user, 60% system w/out aps: 50% user, 10% system I suspect this figures may be the result of the fact that apc uses only a rwlock (it does not implement nor use rw/ro locks). Therefore, internal structures are always locked in a mutex-style, even in the case of a hit. In my opinion, apc needs a read-write/read-only locking strategy to boost performance. With this implemented, in case of a hit to apc's cache, the running process would not be rescheduled by the kernel. Right now, if the lock is held by another process (even in case of a hit to apc's cache), the running process would get scheduled. I would like to work on this. Does a feature like this have any chance to get into apc's official source code? Regards, -- Gonzalo A. Arana Coordinador de Planificacion y Desarrollo UOL Sinectis S.A. Florida 537 piso 6 C1005AAK - Buenos Aires http://www.uolsinectis.com.ar/