On Wed, Jan 09, 2002 at 11:55:21PM -0800, Brian Pane wrote: > My hypothesis upon seeing these numbers is that the high run queue length > is due to us hitting some bottleneck in the kernel on daedalus--and because > post-2.0.28 releases waste less time in usr-space code between syscalls, > they hit that kernel bottleneck a lot harder than 2.0.28 did.
Yes, that is my current thought. From everything I can tell, post-2.0.28 is far superior than 2.0.28. FWIW, Aaron was telling me that he remembers seeing high run-queue lengths on machines with failing hard drives. Can anyone reproduce this behavior (high run-queue with idle CPU) on any other machines? Perhaps we could perform some testing on icarus (which should be a daedalus clone). It seems I'm not reproducing this. We won't be able to resolve any problem unless we can reproduce this in controlled environments. *sigh* -- justin
