Re: [patch] optimize disk_round_stats

From: Arjan van de Ven
Date: Fri Oct 14 2005 - 05:21:45 EST

On Thu, 2005-10-13 at 12:19 -0700, Chen, Kenneth W wrote:
> Following the same idea, it occurs to me that we should only update
> disk stat when "now" is different from disk->stamp. Otherwise, we
> are again needlessly adding zero to the stats.

have you measured this?
Conditionals in code are not free, so it might well be more expensive...

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