polling(4) and idle time/cpu usage percentages

Kevin Day toasty at dragondata.com
Sun May 11 08:57:27 PDT 2003


At 10:44 AM 5/11/2003, you wrote:
>I tried the hack, as below. The other thing that makes idle
>wildly inaccurate is the symmetric multi-threading on the xeon
>(aka hyperthreading).

Smack me if I'm wrong, but you can't compile the kernel with DEVICE_POLLING 
active at the same time as SMP. Without SMP you don't get any of the 
advantages/effects of HTT.

(or has polling been made to play nice with SMP in -current?)

-- Kevin





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