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To: Hogan Whittall <hogan@mystic.sedona.net>
cc: freebsd-smp@freebsd.org
Subject: Re: Still system slowdowns with certain apps 
In-reply-to: Your message of "Sun, 01 Dec 1996 22:08:03 MET."
             <199612020508.WAA02550@mystic.sedona.net> 
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Date: Tue, 03 Dec 1996 02:27:10 +0100
From: Terje Normann Marthinussen <Terje.N.Marthinussen@cc.uit.no>
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>The new kernel works great and I've yet to have a program seg fault on
>me...but ever since I got the latest source on Thursday night I've
>experienced a major system slowdown whenever I compile something.  The
>compile itself moves right along and gets done fast, but everything else
>on the system takes forever to respond until the compile is done.  Before
>Thursday everything worked fine whencompiling and there were still seg
>faults...but this slowdown is new and I was hoping code I got today would
>fix it...but it's still there.  Has anyone else experienced this or know
>of a fix?
>

Well, I have experienced the same slowdown. And it seems like things
are a lot worse than just a slowdown.

Thought I should run a couple of parallell dhrystones just for fun before 
I went home to my bed. Never got that far. The system locked up the moment
I started the first and didn't allow me to do anything else until it had
finished running.

Then I just wrote:
main()
{
  while(1);
}

It didn't start so well, but just when I typed ctrl-c, it froze the system.
Reset button only way out.

Tried again, seems like ctrl-c doesn't have anything to do with it at least.
But the second time I ran the program, things froze quite quickly.
Reset button next....

Seems like it's not as effective as dhrystone (well, that loop by it self
is probably not a very efficient cpu consumer, should be easy enough to 
improve it), but when it locks, it locks well ;)

Terje Marthinussen
terjem@cc.uit.no