Hyperthreading in 6.x ... still frowned upon?

Marc G. Fournier scrappy at hub.org
Wed May 3 19:34:06 UTC 2006

On Wed, 3 May 2006, Spartak Radchenko wrote:

> On Wed, May 03, 2006 at 01:44:02PM -0500, Larry Rosenman wrote:
>> Spartak Radchenko wrote:
>>> On Wed, May 03, 2006 at 11:42:18AM -0300, Marc G. Fournier wrote:
>>>> In 4.x, it was a 'shut it off' sort of deal .. my new amd64 don't
>>>> appear to have it enabled, but my older i386 server that I just
>>>> upgraded to 6.x does:
>>> I am not sure I understood your problem correctly... Do you want
>>> to enable hyperthreading on amd64? But they have no such thing.
>>> Intel only.
>> you do know that EM64T Xeons *DO* have hyperthreading, and (can)
>> run an amd64 kernel?
> Of course. So "amd64" means FreeBSD platform in the original posting,
> not hardware? Ok, thanks. It was not evident to me.

This is correct ... we have two HP Dual Xeon 64bit servers, both running 
FreeBSD 6.x/amd64 ... those ones run without an issue, and don't have 
HyperThreading enabled ... they are slightly older CPUs, so aren't 
Dual-Core either ...

Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: scrappy at hub.org           Yahoo!: yscrappy              ICQ: 7615664

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