Re: NetBSD-1.4.2 kernel is slower than 1.4 and 1.4.1

[Ignatios Souvatzis <is%jocelyn.rhein.de@localhost>]

On Tue, Mar 28, 2000 at 09:48:00PM +0200, Ignatios Souvatzis wrote:
> A change that might be related fixes a cache syncronization problem on 68040.
> This might slow down certain operations, exec would be one of the victims.

Just looked more carefully:

- the configure test you report does lots of exec(). A horrible lot of.
- the exec test tests exec speed, of course.
- the sh test might well depend on exec() speed a lot
- the dc test might also depend on exec() speed a lot, if it calls dc ot
  just execute one command, then executes it again in a loop.

So a cache problem, or just former cache-not-properly-handled problem, will
result in something like the observed performance hits.

Regards,
        -is