On Fri, May 18, 2007 at 04:46:27PM -0700, Matthew Dillon wrote: > A large chunk of the kernel still runs under the big giant > lock, including the light weight processes that libthread_xu > uses, so something like mysql is going to hit a lot of BGL > contention.
Oh, OK. What subsystems are out from under the big giant lock, so I can look for another benchmark to compare with? Also, what profiling and contention measurement tools do you have, so I can try to confirm that this is the issue? > You may be able to get DragonFly to run on the machines you > were having problems with by compiling it with SMP but > without APIC_IO. With that combination DragonFly will use > the PIC in SMP mode, which usually works. The issue is that I cannot even install with a UP kernel, so I can't recompile to test this. I posted with more details about this problem a few months ago. > I'd use 1.8 for any testing, or 1.9 Preview. OK. Thanks, Kris
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