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Re: port-i386/42966: kernel built from today's netbsd-5 crashes
The following reply was made to PR port-i386/42966; it has been noted by GNATS.
From: David Holland <dholland-bugs%netbsd.org@localhost>
Subject: Re: port-i386/42966: kernel built from today's netbsd-5 crashes
Date: Thu, 18 Mar 2010 22:26:47 +0000
On Thu, Mar 18, 2010 at 02:10:05AM +0000, matthew green wrote:
> Turning off DIAGNOSTIC will, however, make your machine run a lot
> faster. (Once upon a time, DIAGNOSTIC was supposed to be cheap and
> only DEBUG was expensive; however, that's no longer true.)
> says who?
> at least on sparc64 DIAGNOSTIC causes only a few percent of performance
> loss. the worst case i found -- ./configure -- averaged at 7% loss,
> but most things were 1-3%.
It was the conventional wisdom a year or two ago, if not longer. Note
that i386 GENERIC (and others) were changed to describe it as
"expensive" instead of the traditional "cheap" at some point.
Last I tried (on amd64) it was horrifying but I'm told that this has
since been fixed.
anyway, this is tangential.
David A. Holland
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