buildworld in 45 min!

[Bob Willcox]

On Thu, Feb 05, 2015 at 04:32:39PM -0600, Valeri Galtsev wrote:
> 
> On Thu, February 5, 2015 3:51 pm, Bob Willcox wrote:
> > On Thu, Jan 08, 2015 at 03:01:41AM -0800, Anton Shterenlikht wrote:
> >> I got a Sun Fire X4100 for 60 pounds off ebay:
> >>
> >> FreeBSD 10.1-RELEASE #0 r274401: Tue Nov 11 21:02:49 UTC 2014
> >> CPU: Dual-Core AMD Opteron(tm) Processor 2220 (2792.64-MHz K8-class CPU)
> >> real memory  = 17179869184 (16384 MB)
> >> avail memory = 16595623936 (15826 MB)
> >> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
> >> FreeBSD/SMP: 2 package(s) x 2 core(s)
> >>
> >> It does buildworld -j8 in under 45 min.
> >> That's really fast!
> >> I'm used to 4 hour ia64 builds.
> >> Time to move on perhaps...
> >>
> >> Anton
> >
> > Not trying to show anyone up (really), but you can just imagine how
> > shocked I
> > was when I first ran a buildworld on my current workstation system in 11
> > minutes!
> >
> > FreeBSD 10.1-STABLE #3 r277033: Sun Jan 11 17:07:24 CST 2015
> > CPU: Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz (3300.07-MHz K8-class CPU)
> > real memory  = 34359738368 (32768 MB)
> > avail memory = 33184337920 (31647 MB)
> > FreeBSD/SMP: Multiprocessor System Detected: 12 CPUs
> > FreeBSD/SMP: 1 package(s) x 6 core(s) x 2 SMT threads
> >
> > The latest run was 11:43 (looks like I'm losing a little ground). This is
> > with -j12.
> 
> I couple of times had notices incomplete build with -j16 (or whatever
> those boxes allowed), ever since run buildworld as a single thread...
> Maybe just me ;-)
> 
> Valeri

Hmm, I have had quite some success with parallel builds myself. However, I
never bother to go beyond the number of logical CPUs in the system. When I did
try that in the past it didn't seem to really speed things up all that much
(if any).

Bob

> 
> >
> > I can remember building 386bsd back in the early '90s on a 386 system and
> > it taking
> > just under 24 hours!  :)
> >
> 
> 
> ++++++++++++++++++++++++++++++++++++++++
> Valeri Galtsev
> Sr System Administrator
> Department of Astronomy and Astrophysics
> Kavli Institute for Cosmological Physics
> University of Chicago
> Phone: 773-702-4247
> ++++++++++++++++++++++++++++++++++++++++

-- 
Bob Willcox    | You climb to reach the summit, but once
bob at immure.com | there, discover that all roads lead down.
Austin, TX     |       -- Stanislaw Lem, "The Cyberiad"