Date: Wed, 7 Sep 2011 21:53:28 -0700 (PDT) From: Stefan Schaeckeler <schaecsn@gmx.net> To: freebsd-ports@freebsd.org Subject: The cost of a source based package system Message-ID: <20110908045328.C6E2E1EE8F1@keeper.homelinux.org>
next in thread | raw e-mail | index | archive | help
Hi all, please don't take this posting too serious. I was just curious ... Just the other day, I bought a kill-a-watt. Among other things, I measured the "cost of a source based package system", i.e. I was comparing the energy cost of installing ports from source vs binary packages (setup, see below). Case 1: Source based installation Time: 7 hours, 3 min Energy: 0.489 kw*h Price: 4.89 US cent Case 2a: Binary packages based installation Time: 1 hour, 57 min Energy: 0.079 kw*h Price: 0.79 US cent If the computer is constantly running, then we should add the installation time of case 1 to case 2a: Case 2b: Binary packages based installation Time: 7 hours, 3 min Energy: (40/1000)kw*(7.05-1.95)h + 0.079 kw*h = 0.283 kw*h Price: 2.83 US cent Using source based ports is with almost 5 US cents 6.19 times (case 1 vs case 2a) or 1.73 times (case 1 vs case 2b) more expensive than using binary packages :) - Stefan Details: Price: 1 kw*h = 10 US cent. Kill-a-Watt trick: by setting the price per kw to $9.999 (= $10), I could get one more digit of accuracy for the consumed energy by dividing the price by 10. HW: Sony vaio pcg-k23 laptop (pentium 4, 2,8 GHz, huge display). Booted into FreeBSD, it consumes around 40 Watt ("idle"). When compiling programs, the power consumption doubles to somewhat above 80 Watt. Internet connection 768kb/s. SW: Installed 259 ports via this script: --- snip --- date for i in /usr/ports/x11/xorg-minimal\ /usr/ports/x11/xorg-apps\ /usr/ports/x11/xorg-cf-files\ /usr/ports/x11/xorg-docs\ /usr/ports/x11/xorg-libraries\ /usr/ports/shells/bash3\ /usr/ports/print/teTeX\ /usr/ports/editors/emacs\ /usr/ports/editors/joe2\ /usr/ports/multimedia/xmms\ /usr/ports/multimedia/ffmpeg\ /usr/ports/lang/clisp\ /usr/ports/lang/hugs\ /usr/ports/lang/swi-pl\ /usr/ports/lang/llvm-gcc4\ /usr/ports/lang/gnat\ /usr/ports/lang/Gofer\ /usr/ports/x11-toolkits/tk86 do cd $i && yes o | make install clean done date halt -p --- snip --- Similarly, 246 binary packages have been installed via pkg_add -r. pkg_delete /var/db/pkg/* rm -rf /usr/ports/distfiles/ PACKAGESITE=ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8-stable/Latest/ export PACKAGESITE --- snip --- date for i in xorg-minimal\ xorg-apps\ xorg-cf-files\ xorg-docs\ xorg-libraries\ bash3\ teTeX\ emacs\ joe2\ xmms\ ffmpeg\ clisp\ hugs\ swi-pl\ llvm-gcc4\ gnat\ Gofer\ tk86 do pkg_add -r $i done date halt -p --- snip --- The number of ports and binary packages varies slightly. I don't know why. This only introduces a small error.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20110908045328.C6E2E1EE8F1>