Performance of 4.x vs 5.x (Re: Lifetime of FreeBSD branches)

[Kris Kennaway]

On Thu, May 26, 2005 at 02:15:54AM +0200, Matthias Buelow wrote:
> 
> >>Others don't see this though, and in other cases it was *definitively
> >>proven* to be caused by the issue I mentioned.  I'll have to think
> >>more about what to try next..thanks for running the tests.
> >
> >Perhaps it's something SATA-related?
> 
> Before restoring my 5.4 dumps after testing -current, I installed 
> fedora3 linux just to verify it isn't somehow the hardware itself.  Ok, 
> plain installation from CDs, kernel "2.6.9-1.667smp" (default 
> installation kernel).  There was absolutely zero noticable lag or any 
> effect on response time on X11 while untarring the same firefox source. 
>  So there really seems to be something foul in FreeBSD in that regard. 
>  And now for the dumps.. *sigh*.

In case you didn't see it, Jeff identified the probable cause of this
and developed the followng patch:

  http://www.chesapeake.net/~jroberson/flushbuf.diff

Does it work for you on 5.4?

Kris
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