Re: [PATCH] NFS: Zeroing NFS and kNFSD stats

["J. Bruce Fields" <bfields@fieldses.org>]

On Mon, Aug 02, 2004 at 12:39:05PM +0200, Olaf Kirch wrote:
> On Tue, Jul 13, 2004 at 11:17:59AM -0400, J. Bruce Fields wrote:
> > But you could exactly the same thing by recording the values at the
> > beginning of the test run and then subtracting.  In practice this is
> > likely to be annoying, so you'd want to write utilities that did this
> > for you, like say
> > 
> > checkpoint_stats stats.txt
> > display_stats --since stats.txt
> 
> But it sucks. I had folks run something like 12-15 performance
> measurements and take the NFS stats, and it was a huge mess to sort
> through.  Telling folks "use nfsstat -z to wipe stats before each
> command" is much easier.

Well, like I say, we could implement "nfsstat -z" by checkpointing as
above but just writing to a file at some default path, though admittedly
the choice of path might not be obvious.

Having nfsstat just hang around till it's signaled (like tcpdump does)
would also be easy.

> Besides, -z is sort of a standard option, so we might as well
> implement it.

Well, OK, I suppose that's an argument for it.--Bruce Fields


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