DragonFly BSD
DragonFly kernel List (threaded) for 2011-02
[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]

Re: HyperThreading

From: Saman Barghi <saman.b@xxxxxxxxx>
Date: Thu, 17 Feb 2011 13:01:28 -0500

On Thu, Feb 17, 2011 at 12:37 PM, Joe Talbott <josepht@cstone.net> wrote:
On Thu, Feb 17, 2011 at 12:41:55PM -0500, Saman Barghi wrote:
> Hi,
> I wanted to know if DragonFlyBSD supports Hyper threading or not. I did some
> benchmarking recently and it seems that on a Xeon dual core with 2 virtual
> cpu per core, DFBSD only scale to 2 threads and after that the number of
> transactions/second dorps (using sysbench oltp). So does that mean DFBSD
> does not support Hyperthreading !? If that is the case, I need to perform
> the benchmarks on a different machine without hyper threading. Please kindly
> advise.

HyperThreading is certainly supported.  Do you have an SMP kernel
installed?  Perhaps your dmesg output would be helpful.


Isn't it enabled by default?! I thought it is. Anyway,  Here is the dmseg output. Please enlighten me and let me know how I can enable SMP as it seems it is not enabled from the dmesg.

=============== dmesg.today ==================
Copyright (c) 2003-2010 The DragonFly Project.
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
DragonFly v2.8.2-RELEASE #2: Fri Oct 29 01:29:56 PDT 2010
TSC clock: 3066101012 Hz, i8254 clock: 1193301 Hz
CPU: Intel(R) Xeon(TM) CPU 3.06GHz (3065.81-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf25  Stepping = 5
  Logical CPUs per core: 2
real memory  = 2146497536 (2047 MB)
avail memory = 2062565376 (1967 MB)
module_register: module pci/ahci already exists!
Module pci/ahci failed to register: 17
FQ scheduler policy version 1.0 loaded
No policy for md0 specified, or policy not found
disk scheduler: set policy of md0 to noop

[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]