On Thu, 26 Oct 2000, NetBSD Bob wrote:

: > > NetBSD-1.3                 865218
: > > NetBSD-1.4                1015803
: > > NetBSD-1.5                1402255
: 
: And now gcc and Feeping Creatures (or is that rats in the bit bucket?)

: For comparison, my minimal stripped MVII kernel of 1.5B1 is  ~650000
: compared to the 1.5 generic kernel of                        1402255

1.5 GENERIC on any architecture is pretty huge.  We have filesystems and
pseudodevices galore these days.  :)

It's almost all features.  There's more you can do if you're strapped for
memory; try changing the "-O2" to "-Os" (that's a lower case s) in the
kernel Makefile.  This will do -O2 *except* for optimizations that increase
code size.  On a low memory machine, this may result in faster code.

One thing I've looked at but not yet really had time to implement is a set
of options that can hardwire sysctls and other typically dynamic values to
allow the compiler to optimize out if/then clauses in speed critical
code.  I do plan on putting more work into this area.

Also, wasn't there a push to change the calling convention for vax between
1.3 and 1.4 to improve kernel speed?  (Was this ever done?)

-- 
-- Todd Vierling <tv@wasabisystems.com>  *  http://www.wasabisystems.com/
-- Speed, stability, security, and support.  Wasabi NetBSD:  Run with it.