Subject: Re: NetBSD-1.4.2 kernel is slower than 1.4 and 1.4.1
To: Inaki Saez <email@example.com>
From: Ignatios Souvatzis <firstname.lastname@example.org>
Date: 03/28/2000 21:56:46
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.