vmark hangs with libthr and libkse

[David Xu]

----- Original Message ----- 
From: "Sheldon Hearn" <sheldonh at starjuice.net>
To: <deischen at freebsd.org>; <freebsd-java at freebsd.org>; <threads at freebsd.org>
Sent: Thursday, August 21, 2003 2:57 PM
Subject: Re: vmark hangs with libthr and libkse


> On (2003/08/20 16:11), Sheldon Hearn wrote:
> 
> > > Any messages on the console or break-to-debugger info?  Are you using
> > > SCHED_4BSD or SCHED_ULE?
> > 
> > I think it was SCHED_4BSD.  I scribbled the panic down on a piece of
> > paper, but can't find it now.  *sigh*
> 
> Nope, it's SCHED_ULE.
> 

ULE does not work with KSE, I have uploaded a patch, please try it.
http://people.freebsd.org/~davidxu/kse/kse_ule.diff
You can not get cpu affinity for KSE process with this scheduler,
The patch only let KSE process work under ULE scheduler.
I have not fully tested it,  for some reason, I won't commit the patch.

> > > > I just do what my old man told me when I complained that banging my head
> > > > against the wall hurt...  "Don't do that, then". :-)
> > > 
> > > No, please do that and give us some more info.  We claim there
> > > are no bugs in libkse, so it's up to you to prove us wrong :-)
> > 
> > Okay, let me finish my work, sync my disks and give it another whirl
> > this afternoon. :-)
> 
> I tried with libkse and now I don't even get a useful panic.  Just "page
> fault" and disk sync!
> 
> I've found my scrap of paper, though.  Here's what I got last week:
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address = 0x0
> code = supervisor write, page not present
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 4 (g_down)
> 
> I don't have DDB in my kernel
> 
> I could reinstall a kernel with DDB enabled.  But then what do I do when
> I get my "page fault" followed by disk sync?
> 
> I realize that the person seeing the problem is usually the person who
> should diagnose it, but I'm under hard pressure on a deadline for work.
> 
> Perhaps someone else with a bit more free time could try this out?
> 
> Ciao,
> Sheldon.
> _______________________________________________
> freebsd-threads at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-threads
> To unsubscribe, send any mail to "freebsd-threads-unsubscribe at freebsd.org"

-- 
David Xu