Re: static binary timings (Was: Some more patches for GCC on NetBSD/VAX coming soon...)

[Johnny Billquist <bqt%update.uu.se@localhost>]

On 2016-03-30 14:11, Anders Magnusson wrote:
> Den 2016-03-30 kl. 13:34, skrev David Brownlee:
> > Conclusions (albeit with simh timings)
> > - having makemandb running makes timings (and the machine) pretty much
> > useless
> > - NOPAM reduced login time by 33%
> > - NOPIC reduced login time by 50%
> > - NOPIC reduced boot time by 25%, even allowing for fixed times such
> > as kernel boot
> This is actually very strange, since the generated assembler is
> basically the same.
>
> Maybe if it's the dynamic linking itself and not PIC that is causing the
> speed penalty?
>
> It would be interesting to test this on real iron (Johnny? :-)  to see
> the outcome.

The 8650 is up and running. Just point me to tarballs... :-)

Dynamic linking definitely have costs. All the file opening and symbol 
resolving... But also, just image activation I seem to remember being an 
issue.

Davids tests are interesting, but unfortunately, having login data 
samples at 6,4,3 means we have way too low resoltion and too few samples 
to draw any real conclusions.

And since David asked, yes - I also noticed that makemandb now is run by 
default at boot time. Was a bit surprised by that one myself. :-)

	Johnny