Messages in this thread | | | Subject | Re: Very high load on P4 machines with 2.4.28 | From | Alan Cox <> | Date | Wed, 05 Jan 2005 14:03:46 +0000 |
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> 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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