On Sat, 12 August 2006 06:56:24 +1000, Anton Blanchard wrote:
>
> > +
> > + skb_index = ((index - i
> > + + port_res->skb_arr_sq_len)
> > + % port_res->skb_arr_sq_len);
>
> This is going to force an expensive divide. Its much better to change
> this to the simpler and quicker:
>
> i++;
> if (i > max)
> i = 0;
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.
Jörn
--
Victory in war is not repetitious.
-- Sun Tzu
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