Subject: Re: is this a bug or a performance problem with UBC/UVM?
To: Chuck Silvers <chuq@chuq.com>
From: Matthew Jacob <mjacob@feral.com>
List: current-users
Date: 02/04/2001 12:19:53
Actually, a clue on this was that I ran myself out of space on /. But instead
of getting "no space" I got these.

Hey- I haven't had this bother me for a while- I avoided the problem
again. But I'd really put it on your list not as something that you *have* to
have dbench to trigger (which, after all, doesn't do anything all *that*
clever)- but something to keep in mind as to how NetBSD just simply fails
to meet some simple goals for a server.

On Sun, 4 Feb 2001, Chuck Silvers wrote:

> well, the printf is already under ifdef DEBUG, I'm not sure what more
> I can do right away without just removing it.  I don't want to remove it
> since it's still useful if people are seeing it.
> 
> if it's causing you problems I'd recommend removing it in your local tree.
> I will look at what dbench does to trigger it, but there a lot of problems
> right now and I'm swamped just trying to get caught up from my time away
> in india.
> 
> -Chuck
> 
> 
> On Sun, Feb 04, 2001 at 11:34:56AM -0800, Matthew Jacob wrote:
> > 
> > It made the system so unresponsive that I had to power cycle it.
> > 
> > 
> > On Sun, 4 Feb 2001, Chuck Silvers wrote:
> > 
> > > that's a debug printf, complaining that we're trying to flush pages after EOF.
> > > nothing bad, just silly.  I should give dbench a try and see where we're
> > > going wrong.  that'll be quite a way down the todo list, though.
> > > 
> > > -Chuck
> > > 
> > > 
> > > On Sat, Jan 27, 2001 at 12:46:08PM -0800, Matthew Jacob wrote:
> > > > 
> > > > I'm running a neat little stress tester (dbench- quite useful for stressing a
> > > > system: ftp://samba.org/pub/tridge/dbench) on top of tree NetBSD on an
> > > > alpha....
> > > > 
> > > > A dbench 128 on a 128MB memory PC164 runs it out of memory pretty quick...
> > > > things sort of freeze up, but continue along... what's more alarming is this-
> > > > I'm getting continuous streams of these now:
> > > > 
> > > > uvn_flush: oor vp 0xfffffc000206e550 start 0x0 stop 0x8000 size 0x0
> > > > 
> > > > with various stop addressses and vnode pointers....
> > > > 
> > > > Was is das?
> > > > 
> > > > 
> > > 
>