FreeBSD's problems as seen by the BSDForen.de community

John Baldwin jhb at freebsd.org
Mon Jan 14 06:32:36 PST 2008


On Saturday 12 January 2008 04:11:31 am Dominic Fandrey wrote:
> Kris Kennaway wrote:
> > Kris Kennaway wrote:
> >> Dominic Fandrey wrote:
> >>> The first problem is the unbearable performance many AMD users are
> >>> suffering
> >>> for several chipset and CPU generations. Even minimal I/O load on a
> >>> hard disk
> >>> suffices to lock up whole systems. Posts on the mailinglists current and
> >>> stable have often been answered with denial or have simply been
> >>> ignored. Only
> >>> on very rare occasions (if at all) have these problems been taken
> >>> seriously.
> >>
> >> Thanks for the feedback.  It is hard to respond to the reports of poor
> >> performance or other problems without specific information though.
> > 
> > FYI this was not a dismissal, it was an invitation for you to follow up
> > with the specific problems your members have seen so we can try to
> > evaluate them.
> 
> Yes, thank you. I consider the first replies to the mail as very positive and
> the intention to take us serious and try help us is clear. I'm a bit
> disappointed the thread has been hijacked by people who want to press their
> own agenda. The last time I sent a performance complaint to ports@ it resulted
> in faster code (pkg_install, bsd.ports.mkd), not in license discussions.
> 
> Anyway, the general description is the following: during a portupgrade the
> system response time goes up to several seconds or even minutes during a
> portupgrade. Imagine writing an email and having to wait a minute for your
> typing to show up. Needless to say, that using a mouse is impossible.
> This effect how ever is, though best seen there, not limited to X. Ping times
> to an affected system doing a portupgrade also go up to several seconds (over
> a cross cable).

Look at /usr/src/tools/sched/schedgraph.py.  It has instructions near the top
of the file on what kernel options to use and ports to install.

-- 
John Baldwin


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