Re: SMP performance on drgonfly

[Kris Kennaway <kkenn@xxxxxxxxxxxxxxxxxx>]

On 2007-05-19, Gergo Szakal <bastyaelvtars@gmail.com> wrote:
> On Fri, 18 May 2007 16:46:27 -0700 (PDT)
> Matthew Dillon <dillon@apollo.backplane.com> 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.
>> 
>
> BTW shouldn't he test the libthread_xu capabilities with Preview instead?

If there is a reasonable expectation that Preview will perform
differently then I am happy to test it, but the way I read Matt's
email is that there has been no recent progress on SMP development
that might improve performance here.

Kris