Hyperthreading hurts 5.3?

Subhro subhro.kar at gmail.com
Wed Jan 12 20:17:50 PST 2005

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org [mailto:owner-freebsd-
> questions at freebsd.org] On Behalf Of Anthony Atkielski
> Sent: Thursday, January 13, 2005 6:14
> To: freebsd-questions at freebsd.org
> Subject: Re: Hyperthreading hurts 5.3?
> Andrea Venturoli writes:
> Where these computations in which all threads were doing pretty much the
> same thing?  And was it floating-point?  (Doesn't the processor have
> just one FPU, or something like that?)

Yes Dual cored CPUs have a single FPU.

> An AMD processor will also melt or catch fire if the CPU fan fails,
> whereas an Intel processor won't. I found this out the hard way, and so
> henceforth I'll be installing Intel processors. The cost savings one
> gets from buying AMD isn't enough to pay for a new motherboard or PC.

This *used* to be true. I am using a AMD64 3000+ and the idle temperature is
28C. The room temp is around 12-14C. After asking this kid to crunch FPs for
over 16 hrs, the processor temperature rose to only 38C. I am not using any
special cooling gears, just the stock heatsink fan combo that came with the
box pack.

Indian Institute of Information Technology
Subhro Sankha Kar
Block AQ-13/1, Sector V
Salt Lake City
PIN 700091
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