Ohh this sounds like an awesome optimization... I noticed mutex contentions were extremely high on a very high traffic machine (say.. high enough to get close to maxing out a gig ethernet card) using the worker mpm on solaris 8... it may also have to do with caching we were doing (mod_mem_cache crashed and burned, we had to use mod_file_cache to get it to work but it was still quite the exercise).
Dave ----- Original Message ----- From: "Brian Pane" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, December 31, 2002 5:30 PM Subject: [PATCH] remove some mutex locks in the worker MPM > I'm working on replacing some mutex locks with atomic-compare-and-swap > based algorithms in the worker MPM, in order to get better concurrency > and lower overhead. > > Here's the first change: take the pool recycling code out of the > mutex-protected critical region in the "queue_info" code. Comments > welcome... > > Next on my list is the code that synchronizes the idle worker count. > I think I can eliminate the need to lock a mutex except in the > special case where all the workers are busy. > > Brian > >
