Messages in this thread | | | Date | Mon, 23 Feb 2009 11:33:00 -0500 (EST) | From | Christoph Lameter <> | Subject | Re: [PATCH 04/20] Convert gfp_zone() to use a table of precalculated value |
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On Mon, 23 Feb 2009, Mel Gorman wrote:
> I was concerned with mispredictions here rather than the actual assembly > and gfp_zone is inlined so it's lot of branches introduced in a lot of paths.
The amount of speculation that can be done by the processor pretty limited to a few instructions. So the impact of a misprediction also should be minimal. The decoder is likely to have sucked in the following code anyways.
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