freebsd downgrade

[Slawa Olhovchenkov]

On Tue, Jul 28, 2015 at 11:02:49PM +0000, Glen Barber wrote:

> On Wed, Jul 29, 2015 at 01:09:05AM +0300, Slawa Olhovchenkov wrote:
> > On Tue, Jul 28, 2015 at 09:45:28PM +0000, Glen Barber wrote:
> > 
> > > On Wed, Jul 29, 2015 at 12:42:12AM +0300, Slawa Olhovchenkov wrote:
> > > > On Sat, Jul 25, 2015 at 02:27:50AM +0000, Glen Barber wrote:
> > > > 
> > > > > On Fri, Jul 24, 2015 at 06:36:32PM +0300, Slawa Olhovchenkov wrote:
> > > > > > On Fri, Jul 24, 2015 at 08:25:55AM -0700, Navdeep Parhar wrote:
> > > > > > 
> > > > > > > On Fri, Jul 24, 2015 at 10:50:10AM +0300, Slawa Olhovchenkov wrote:
> > > > > > > > > > 
> > > > > > > > > > For me -- degradate network performance, about 30%. I am do
> > > > > > > > > > verification now, by downgrading kernel.
> > > > > > > > > 
> > > > > > > > > What kind of workload and what NIC are you using?
> > > > > > > > 
> > > > > > > > Chelsio T580-LP-CR, http serving.
> > > > > > > > r276179 can utilise 40Gbit, r281264 -- only 28Gbit.
> > > > > > > 
> > > > > > > Can you please try -RC1 when it comes out and report back if you still
> > > > > > > see degraded network performance? 
> > > > > > 
> > > > > > Now I am try revisons r276179 and compare with r281264 (for absolutly
> > > > > > clean compare -- same hardware, same configuration, same workload)
> > > > > > before this I am comare slighty different hardware (card instaled in
> > > > > > different slots) and posibly different workload.
> > > > > > After this I am try r278800 and RC1 -- one times per day.
> > > > > > 
> > > > > 
> > > > > Please try with the 10.2-RC1 that was just released, and report back.
> > > > 
> > > > Root of cause is BIOS setting: need ACPI NUMA to OFF.
> > > > After this change performance gain about 30%.
> > > > Sorry for false alaram.
> > > > 
> > > 
> > > Thank you for providing this information.
> > 
> > Supermicro X10DRi + Dual E5-2640v3, if you interesting
> > 
> 
> Yes, thank you.
> 
> We have a few X10SLH-F/X10SLM+-F systems in the FreeBSD.org cluster, but
> I am unsure if this option is available on all X10-series systems.  I'll
> reboot one of them later today, and dig around in the BIOS.

For may workload (http servering) best result is

Hyper-Threading: OFF
Socket Interleave Below 4GB: ON
ACPI NUMA: OFF

For computing-intensive workload may be differ.