Re: 7+ days of dogfood

Erich Dollansky <erichsfreebsdlist_at_alogt.com> wrote:

> On Mon, 11 Feb 2013 11:48:11 +0100
> Fabian Keil <freebsd-listen_at_fabiankeil.de> wrote:

> > It's unfortunate that the builworld time roughly trippled since
> > 2010 but I guess that's progress and a more powerful system
> > should fix it. I certainly welcome clang in general, though.
> > 
> Trippled? Are you sure? I have the feeling it is much worse than this.

I'm sure it depends on lots of factors and our worlds probably
don't even match.

I intend to eventually plot the numbers I've collected over the years
(mainly to have a baseline for ZFS tuning) but so far I haven't and
just looked at the first and last ones:

--------------------------------------------------------------
>>> Kernel build for ZOEY completed on Mon May 31 17:18:12 CEST 2010
--------------------------------------------------------------

real    10m42.935s
user    8m16.834s
sys     1m22.951s
--------------------------------------------------------------
>>> World build completed on Mon May 31 18:38:59 CEST 2010
--------------------------------------------------------------

real    71m16.524s
user    51m55.771s
sys     12m24.944s

# FreeBSD r500.local 10.0-CURRENT FreeBSD 10.0-CURRENT #543 r+b74c91e: Sun Feb  3 17:17:03 CET 2013     fk_at_r500.local:/usr/obj/usr/src/sys/ZOEY  amd64
--------------------------------------------------------------
>>> World build completed on Tue Feb  5 21:33:55 CET 2013
--------------------------------------------------------------

real	261m25.904s
user	189m2.690s
sys	22m46.777s

# FreeBSD r500.local 10.0-CURRENT FreeBSD 10.0-CURRENT #547 r+21d959a: Sun Feb 10 16:00:14 CET 2013     fk_at_r500.local:/usr/obj/usr/src/sys/ZOEY  amd64
--------------------------------------------------------------
>>> Kernel build for ZOEY completed on Sun Feb 10 21:41:31 CET 2013
--------------------------------------------------------------

real	18m34.822s
user	12m13.900s
sys	2m14.028s

fk_at_r500 ~ $expr 261 / 71
3

I agree that it "feels" worse, though.

Disclaimer: These aren't "benchmark" results, I didn't create them in
single-user mode and various relevant factors vary. I also didn't run
the numbers through ministat and don't intend to either.

> Was it in 2009 when I could compile world in a few minutes on my quad
> core. The same machine takes now hours despite having more memory.

I'm using a Core(TM)2 Duo CPU T5870 _at_ 2.00GHz and don't remember
ever being able to compile world in a few minutes. The bottle
neck on my system seems to be the puny 2 GB of RAM the linker
has to share with ZFS.

At least I can still buildworld without first attaching an USB
stick for additional swap space which is necessary for Firefox ...

Fabian