Re: [PATCH] x86: Align jump targets to 1 byte boundaries

From: H. Peter Anvin
Date: Fri Apr 10 2015 - 14:33:36 EST

On 04/10/2015 10:54 AM, Ingo Molnar wrote:
> Yeah, but the decoder stops if the prefetch crosses a cache line? So
> it appears to be an interaction of the 16 byte prefetch window and
> cache line boundaries?

I don't think it has anything to do with cache lines. Rather, you may
lose a cycle if the first instruction bundle crosses into a new 16-byte


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