Questions on the scheduler

[Abdullah Ibn Hamad Al-Marri]

On 9/29/07, Kris Kennaway <kris at freebsd.org> wrote:
> Oliver Herold wrote:
> > Are there any numbers or technical papers? Just out of curiosity.
>
> I ran a mysql benchmark against Dragonfly-current and FreeBSD 7 on an
> 8-core machine (one of the workloads that FreeBSD now performs very well
> at) and found 0 scaling on dragonfly.  Their developers confirmed that
> the kernel is still entirely giant locked (as in FreeBSD 4) so no SMP
> performance benefits are possible.
>
> The email thread is here:
>
>    http://leaf.dragonflybsd.org/mailarchive/users/2007-05/msg00134.html
>
> although the linked graph is offline.  The FreeBSD curve was essentially
> this one (FreeBSD has improved further since then):
>
>    http://people.freebsd.org/~kris/scaling/scaling.png
>
> with dragonfly a flat line at ~500 tps independent of load.
>
> Kris

How does NetBSD, and OpenBSD scale when it comes to SMP comparing to
FreeBSD 7.0?


-- 
Regards,

-Abdullah Ibn Hamad Al-Marri
Arab Portal
http://www.WeArab.Net/