8-STABLE performance issues on Supermicro Core i7

Jeremy Chadwick freebsd at jdc.parodius.com
Mon May 3 22:48:17 UTC 2010

On Sun, May 02, 2010 at 09:40:13PM -0500, Bryce Edwards wrote:
> I've got a new Supermicro X58 system with an Intel Core i7 930 with 6
> GB ram that is not performing nearly as fast as it should in many ways
> (compiling, network transfers).

By the way, an interesting thread you might read -- yes it's long.
Subject "Only 70% of theoretical peak performance on FreeBSD 8/amd64,
Corei7 920":


The performance stats you're providing are much lower than 70% peak, so
I'm not sure there's a correlation, but that's a thread which did bring
up odd performance-affecting changes in the i5/i7 architecture:


It's also hard to determine from the thread given its length, but I
believe pinning a process to an individual CPU increased (~20%+) the OPs


| Jeremy Chadwick                                   jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

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