Re: Hang running fs_mark

[Chris Mason <chris.mason@oracle.com>]

On Thu, 2008-09-25 at 17:10 -0400, Ric Wheeler wrote:

> > Ok, I have that fs_mark test running here.  How far did yours get before
> > it stopped?
> >
> > -chris
> >
> >   
> I had gone (in heavy fsync mode) up to about 8 million files on a 1TB 
> s-ata disk:
> 
>     17      8064000        20480          5.6         15301404
> 
> This is the new (no system sync() call) Chris special fs_mark.  The rate 
> had been quite reasonable, starting out at around 160 20k files/sec, 
> went under 100 files/sec at around 3 million files and then fell under 
> 50 files/sec at around 7.5 million before hitting this really low speed 
> at just under 8 million.
> 
> Maybe it really was not hung, just extremely slow...
> 

I'm at 6.9 million files so far on a 500GB disk, and not surprisingly, I
get  155 files/sec ;)  My hope is that we're spinning around due to bad
accounting on the reserved extents, and that Yan's latest patch set will
fix it.

-chris