impressive buildworld time

[Kris Kennaway]

Jeremy Chadwick wrote:
> On Wed, Nov 14, 2007 at 05:56:16PM +0100, Claus Guttesen wrote:
>> Hi.
>>
>> Just installed a new DL360 with 8 cores at 2.33 Ghz and 8 GB ram and
>> 15K rpm sas-disks. When I installed the beta2 from cd 'make -j 9
>> buildworld' took approx. 20 min. After a recompile of userland and
>> kernel and switch to ULE it went down to:
>>
>>>>> World build completed on Wed Nov 14 17:44:08 CET 2007
>> --------------------------------------------------------------
>> 3552.428u 1298.485s 16:15.89 497.0%     6156+1325k 25257+8117io 3368pf+0w
>>
>> Not very scientific and only one run but none the less my fastest
>> buildworld time ever on FreeBSD. :-)
> 
> Congrats!  :-)  16 minutes is really impressive...
> 
> Our 2.13GHz C2D 6420 boxes w/ 2GB RAM can do this in about 19 minutes
> flat (using ULE scheduler).  Disks are 7200rpm SATA300.  make -j2 used;
> and this was RELENG_6.
> 
> The reason I like the buildworld "benchmark" is because it's a fairly
> real-world test and not something specific to just one piece of how
> a machine behaves (e.g. memory benchmark, disk benchmark, CPU benchmark,
> etc.).

It's not a good SMP benchmark though, because large parts are entirely 
single-threaded, and other large parts do not parallelize beyond more 
than a couple of CPUs.  Also it is entirely incomparable between 
different versions of the source tree.

Kris