Messages in this thread | | | Date | Sun, 12 Dec 2004 23:23:12 +0100 | From | Andrea Arcangeli <> | Subject | Re: dynamic-hz |
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On Sun, Dec 12, 2004 at 05:35:47PM +0100, Pavel Machek wrote: > It certainly helps with singing capacitors... What is overhead of
;)
> this?
The overhead is a single l1 cacheline in the paths manipulating HZ (rather than having an immediate value hardcoded in the asm, it reads it from a memory location not in the icache). Plus there are some conversion routines in the USER_HZ usages. It's not a measurable difference. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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