Path: utzoo!attcan!uunet!mcvax!botter.cs.vu.nl!ark.cs.vu.nl!polder
From: polder@cs.vu.nl (Polderman Paul)
Newsgroups: comp.unix.wizards
Subject: UNIX performance on a VAX & 68020
Keywords: speed difference
Message-ID: <1273@ark.cs.vu.nl>
Date: 20 May 88 14:33:19 GMT
Reply-To: polder@cs.vu.nl (Paul Polderman)
Organization: Vrije Universiteit Informatica, Amsterdam
Lines: 11

Benchmarks show that a 68020 is at least as fast as a VAX-11.
But if I start e.g. 6 C-compilers on a UNIX-system running on a 68020,
the performance collapses completely (even when no swapping is necessary),
where on a VAX the system-performance stays reasonable.
I wonder why this is so, when the CPU-speeds are roughly the same.

I asked several people, but none of them seems to be able
to give me a clear answer.

--
Paul Polderman (polder@cs.vu.nl)