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Re: Buying a new computer, questions!

On Mon, Feb 02, 2004 at 08:37:53AM +0100, Mike M wrote:
> On Mon, Feb 02, 2004 at 12:57:27AM -0800, Nano Nano wrote:
> > I am going to buy a new computer this week (yay Bush tax cuts!) -- will 
> > it work with Linux?
> > 
> > Intel Pentium 4/ 3.2C GHz 800MHz FSB, 512K Cache, Hyper Threading 
> > Technology - Retail
> 1. I have a Mobile Pentium 4 with h/t running unstable with 2.4 kernel;
> seems A-OK to me
> 2. Read in O'Reilly "Understanding the Linux Kernel" 2nd Ed. that:
> "Very recently, Intel introduced the hyper-threading technology.
> Basically, the hyper-threaded CPU isa microprocessor that executes two
> threads of exectuions at once; it includes serveral copies of the
> internal registers and quickly switches between them. Thanks to this
> approach, the machine cycles spent when one thread is accessing the RAM
> can be exploited by the second thread. A hyper-threaded CPU is seen by
> the kernel as two different CPUs, so Linux does not have to be
> explicitly made aware of it. However, Lnux breaks the "oldest idle rule"
> and forces an immediate resceduling when it discovers that a
> hyper-threaded CPU is running two idle processes."

This seems to be fixed in 2.6.x.  See


and search on "hyper."

In a completely rational society, the best of us would aspire to be 
_teachers_ and the rest of us would have to settle for something less, 
because passing civilization along from one generation to the next 
ought to be the highest honor and the highest responsibility anyone 
could have.     - Lee Iacocca

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