Re: Very high load on P4 machines with 2.4.28
From: Alan Cox
Date: Wed Jan 05 2005 - 10:11:18 EST
> Maybe I am victim of marketing (or poor memory) but wasn't it so that
> x86 instruction HLT was possible to use for single logical processor?
You can easily park one of the threads ("rep nop" is used as a hint to
give the CPU back to the other thread so
1: hlt
rep nop
jr 1b
ought to do it, but in HT mode other stuff like the cache behaviour is
often changed
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