On Mon, Jul 30, 2012 at 04:58:20AM -0700, Anton Vorontsov wrote: > This makes the code more izolated. > > The downside of this is that we now have an additional branch and the > code itself is 8 bytes longer. But on the bright side, this new layout > can be more cache friendly since cr_alignment address might be already > in the cache line (not that I measured anything, it's just fun to think > about it).
The caches are harvard, so mixing data and code together does not increase performance. Having data which is used by the same code in the same cache line results in better performance. The additional branch will also cause a pipeline stall on older CPUs. So no, I don't see any way that this is a performance improvement. Please leave this as is. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
