SMP performance on drgonfly
kris at obsecurity.org
Fri May 18 17:32:28 PDT 2007
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
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.
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 187 bytes
Desc: "Description: PGP signature"
More information about the Users