Date: Fri, 16 Nov 2007 00:51:59 -0600 From: David J Brooks <freysman@comcast.net> To: freebsd-questions@freebsd.org Subject: Re: unimpressive buildworld time Message-ID: <200711160052.00058.freysman@comcast.net> In-Reply-To: <473D2DBD.2030100@gmail.com> References: <b41c75520711140856m3b082903l2378140d8cd394cb@mail.gmail.com> <473D2C62.3040707@u.washington.edu> <473D2DBD.2030100@gmail.com>
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On Thursday 15 November 2007 11:42:21 pm Aryeh M. Friedman wrote: > Garrett Cooper wrote: > > Tim Daneliuk wrote: > >> Jonathan Horne wrote: > >>> On Wednesday 14 November 2007 03:45:07 pm Aryeh M. Friedman > >>> > >>> wrote: > >>>>> Impressive ;-) My main machine (with an Athlon XP @ 2GHz) > >>>>> takes ~2 hours to build kernel and world (I use a script to > >>>>> do that). My other box is running -CURRENT and takes ~11 > >>>>> hours to build kernel and world (Celeron 500...). > >>>>> > >>>>> Just to supply some numbers that "go the other direction" > >>>>> > >>>>> :-) > >>>> > >>>> With no -j and running gnome and doing other things in the > >>>> foreground (watching a avi) 1 hr 3 mins on a e6850 w/ 4 gig > >>>> (amd64) > >>> > >>> p4 540 3.2GHz, 1GB ram: > >>> > >>> -------------------------------------------------------------- > >>> > >>>>>> World build completed on Thu Nov 15 19:15:05 CST 2007 > >>> > >>> -------------------------------------------------------------- > >>> > >>> real 63m8.635s user 102m44.096s sys 10m44.889s > >>> [root@athena /usr/src]# > >>> > >>> heh, i have appropriately renamed the thread. :) with -j 8 > >>> > >>> cheers, > >> > >> My Pentium-D 3G DualCore w/2G memory and a pretty vanilla SATA > >> drive does buildworld and 3 different kernels in 68 minutes wall > >> time building 6.3-PRE (aka -STABLE) using -j20. > > > > SMP kernels on STABLE (6.x) are going to perform worse than SMP > > kernels on CURRENT (7-RELENG / 8-CURRENT), depending on the > > scheduler used (4BSD vs ULE scheduler), as well as a variety of > > other factors. > > > > Remember... performance not only depends upon clock speed or the > > number of cores you have, but also what caching/prefetching scheme > > FreeBSD uses (not sure if it's fetches large amounts infrequently > > or small amounts frequently), how much memory is available to make > > and its spawned processes (gcc, awk, etc), as well as the number of > > processes active on the machine, and host usage (high disk usage, > > high memory usage, etc). > > > > After reading through the thread, I noticed that people are making > > comparing apples to oranges, as... > > Some people are taking this thread *WAY TOO SERIOUS* as far I can tell > it is meant as a light hearted lets post funny numbers thread. And here I was thinking it was a 'my machine can beat up your machine' thread. ;) David -- Controlling you through microchips since 1999.
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