Re: kernel scheduler

Karl M. Hegbloom (karlheg@bittersweet.inetarena.com)
17 Feb 1998 21:49:31 -0800


>>>>> "Andrew" == Andrew J Anderson <andrew@db.erau.edu> writes:

Andrew> I have been looking at the QNX-style scheduler patches for
Andrew> 2.0.x, and I would like to know what the feeling is about
Andrew> touching the scheduling code.

I don't know anything about kernel scheduling, but experimented a
little with a QNX patched kernel.

I ran a prime generator program in MIT-Scheme, and then increased the
priority of the scheme process, thinking, naively, that it would
speed up the calculations.

The procmeter CPU meter went solid black, and I could not regain
control of the computer, which was happily computing prime numbers.

It occured to me that if you went and upped the priority of your
Apache daemon, and a CGI program began to infloop, you'd have to
reboot your server to get it back. That sort of situation could be
dangerous in some industrial environments...

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