Re: [RFC 8/8] x86_64: Support for new UV apic

[Jack Steiner]

> 
> if the calling path like GET_APIC_ID is keeping checking if it is UV
> box after boot time, that may not good.
> 
> don't need make other hundreds of machine keep running the code only
> for several big box all the time.
> 
> YH


I added trace code to see how often GET_APIC_ID() is called. For
my 8p AMD box, the  function is called 6 times per cpu during boot.
I have not seen any other calls to the function after early boot
although I'm they occur under some circumstances.

Can you think of a workload where the frequency of calls is
high enough to be significant??

--- jack
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/