Re: ufsstat - testers / feedback wanted!

From: Brooks Davis <brooks_at_one-eyed-alien.net>
Date: Thu, 13 Oct 2005 11:10:26 -0700
On Thu, Oct 13, 2005 at 02:12:11PM +0200, Max Laier wrote:
> On Thursday 13 October 2005 13:36, Eric Anderson wrote:
> > I have not done any performance testing yet to see if it impacts
> > filesystem performance by any measurable amount, so if someone does do
> > this testing before I do, please post your results!
> 
> I don't think you can measure one single interger (or 64bit) increase in face 
> of a operation that has to access backing store.  Even if there is a 
> performance hit, you don't have to build your kernel with the option enabled.

The one thing I'd be worried about here is that 64bit updates are
expensive on 32bit machines if you want them to be atomic.  Relative to
backing store they probably still don't matter, but the might be
noticable.

-- Brooks

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Received on Thu Oct 13 2005 - 16:10:33 UTC

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