HTT on Atom (Was: FreeBSD 8.0 and Atheros AzureWave wireless
brett at lariat.net
Fri Nov 27 02:18:56 UTC 2009
At 04:33 PM 11/26/2009, Manolis Kiagias wrote:
>Though it seems hyperthreading is improved on the Atom and there is no
>penalty for leaving it on.
Is there really no penalty? With HZ=1000 there are double the clock
interrupts to be serviced at least. And as I understand it the Atom
has less redundant hardware, so there are less likely to be unused
resources available to the second thread. I am seeing substantially
faster compiles with the SMP option commented out of the kernel.
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