Date: Fri, 18 Nov 2016 11:03:47 -0200 From: Eduardo Lemos de Sa <eduardo.lemosdesa@gmail.com> To: Polytropon <freebsd@edvax.de> Cc: Matt Smith <matt.xtaz@gmail.com>, "Christoph P.U. Kukulies" <kuku@kukulies.org>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: how long does a make buildworld normally take? Message-ID: <CA%2BnjGkuR5G57m8KrShfkf3Noa-njWpV2vFiOHOBKG0z%2B1YEXEg@mail.gmail.com> In-Reply-To: <20161118115801.4ef94f0d.freebsd@edvax.de> References: <b3bc55ef-5389-0f46-752a-290a45ee97fc@kukulies.org> <20161118101752.GA39102@gmail.com> <20161118115801.4ef94f0d.freebsd@edvax.de>
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Dear On Fri, Nov 18, 2016 at 8:58 AM, Polytropon <freebsd@edvax.de> wrote: > On Fri, 18 Nov 2016 10:17:52 +0000, Matt Smith wrote: > > On Nov 18 10:38, Christoph P.U. Kukulies wrote: > > >how long does a make buildworld normally take? > > >Has make buildworld time constant over the years? > > > > > > > > >In 1995 "make world" on a Pentium Pro about 18 hours > > >On my 4GB, CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ > > >(1995.64-MHz 686-class CPU) > > >make buildworld took about 18 hours. Well that CPU isn't the latest > > >either (10 Years or so) > > > > > > > 18 hours?! On my current home-server which is an Intel Atom D525 1.8ghz > > it only takes 5 hours. And these are not known for being fast at all. > > Allow me to quote from a message I wrote in 2008, in order to > illustrate technical progress by collectingg several build times > for different world and kernel configurations. > > FreeBSD 5 on Pentium 4 with 2 GHz and 1 GB RAM: > > b.world+b.kern: 17494.415u 2562.134s 5:46:42.25 96.4% (with CFLAGS) > 17474.169u 2481.368s 5:46:30.40 95.9% (without CLFAGS) > 5608.712u 1595.130s 2:13:18.67 90.0% > 6382.185u 1788.433s 2:26:36.06 92.8% > buildworld: 5086.993u 1431.086s 1:58:16.33 91.8% > 11457.047u 2151.158s 3:54:15.31 96.8% > buildkernel 2326.380u 234.457s 43:42.15 97.6% > 1102.491u 278.194s 25:18.58 90.9% > 1182.203u 294.622s 26:12.71 93.9% > 1518.402u 310.741s 34:16.96 88.9% > 3289.368u 529.669s 1:05:25.90 97.2% > installkernel: 5.718u 6.898s 0:30.97 40.6% > 6.655u 7.389s 0:32.08 43.7% > 6.994u 7.734s 0:33.19 44.3% > > (...software advance happens here...) > > FreeBSD 7 on Pentium 4 with 2 GHz and 1 GB RAM: > > b.world+b.kern: 16574.070u 2516.128s 6:06:03.90 86.9% (with debug) > 18232.967u 2427.404s 7:19:49.24 78.2% (with debug) > 18992.839u 2569.146s 9:12:00.28 65.1% > buildworld: 11457.047u 2151.158s 3:54:15.31 96.8% > buildkernel: 3289.368u 529.669s 1:05:25.90 97.2% > 3503.732u 524.399s 1:11:05.53 94.4% > 4032.019u 572.636s 1:58:29.08 64.7% (with debug) > installkernel: 17.396u 12.587s 0:46.89 63.9% > 18.890u 12.131s 1:11.85 43.1% > > As you can see, 5 hours was a possible value on a single-core > single-threat slow-as-ass CPU. But then the system became more > advanced, and 7 - 9 hours compile time became possible. :-) > > > > > In > > 1996 ish I was doing it on something like a pentium 75 and I think it > > still took about 5 hours. So you're right there! 18 hours seems way too > > long though. > > On my first FreeBSD machine, compiling world and kernel needed > approx. 24 hours. The kernel itself could be rebuilt in more or > less 6 hours. Today we have loadable modules. :-) > > > > > These days it compiles things like clang which take a very long time. > > But it also introduces optimization which the "old compilers" did > not provide, so by investing more build time, you get a better > runtime experience (programs run faster). Especially on limited > hardware, this is worth considering (like in ye olde days setting > several "strange" CFLAGS to make mplayer perform better). > > > > -- > Polytropon > Magdeburg, Germany > Happy FreeBSD user since 4.0 > Andra moi ennepe, Mousa, ... > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions- > unsubscribe@freebsd.org" > I found strange to spend 18, or even, 5 hours to finish a make buildworld. My desktop is certainly the faster for standart machines: hw.machine: amd64 hw.model: AMD FX(tm)-8320 Eight-Core Processor hw.ncpu: 8 hw.machine_arch: amd64 with 16 GB Ram (1333 MHz) and spend less than 2 hours: -------------------------------------------------------------- >>> World build started on Wed Nov 16 17:23:35 BRST 2016 -------------------------------------------------------------- -------------------------------------------------------------- >>> Rebuilding the temporary build tree -------------------------------------------------------------- -------------------------------------------------------------- >>> World build completed on Wed Nov 16 19:07:33 BRST 2016 -------------------------------------------------------------- It is a FreeBSD-10.3-release, with a single processor (no parallel) I suggest you to check your procedure or even possible problems with your hard disk. My best wishes Eduardo --=20 Eduardo Lemos de Sa Associated Professor Level 4 Dep. Quimica da Universidade Federal do Paran=C3=A1 fone: +55(41)3361-3300 fax: +55(41)3361-3186
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