Re: [PATCH 1/6] ehea: interface to network stack

From: Anton Blanchard
Date: Mon Aug 14 2006 - 10:38:18 EST

> Is a conditional cheaper than a divide? In case of a misprediction I
> would assume it to be significantly slower and I don't know the ratio
> of mispredictions for this branch.

A quick scan of the web shows 40 cycles for athlon64 idiv, and its
similarly slow on many other cpus. Even assuming you mispredict every
branch its going to be a win.

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