Date: Tue, 20 Mar 2001 23:32:25 -0500 From: "Christian S." <cschreiber@netrail.net> To: <kstewart@urx.com> Cc: <freebsd-questions@freebsd.org> Subject: RE: Making & forking processes to accomplish faster compiles Message-ID: <MPEGJCJPPBKNCNBGOHGDKEEICNAA.cschreiber@netrail.net> In-Reply-To: <3AB82886.27BE3136@urx.com>
next in thread | previous in thread | raw e-mail | index | archive | help
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Kent, Thanks for the input, that seems to prolly be the case (That the CPU is far faster than the HD), so it may not make much of a difference... *sigh* thank you for your help! :) Chrisitan "...we have only twice as many genes as a fruit fly, or roughly the same number as an ear of corn, about 30,000." Ergo, we are all corn. - -----Original Message----- From: Kent Stewart [mailto:kstewart@urx.com] <snippage> See if the "-j4" parameter fits the description of what they did. BTW, that only works when the HD I/O is faster than the cpu. When the cpu is starved for I/O and you use a -j4, the build takes much longer. To test what it does do your buildworld using "time make -j4 buildworld". You have to time the build with out the -j4 and with the -j4. When I timed both, the results I saw were as follows: buildworld with files on 3 controllers and -j4 with softupdates 1539.114u 521.486s 45:54.82 74.7% 1209+1431k 48857+129907io 1858pf+0w buildworld with files on 3 controllers with softupdates and no -j4 1524.149u 431.967s 38:41.07 84.2% 1245+1453k 49804+11665io 1915pf+0w It is fairly repeatable. The build without -j4 was slightly faster for both u&s times, and it ran 17% faster by the wall clock. The system is an AMD 900 Thunderbird with 256MB of PC-133 memory and 3x30GB ATA-100 drives on separate controllers. I have a 2nd system with dual 866 coppermines and they will do a buildworld with -j4 in 34 minutes. Anything different compiles with a longer time. -----BEGIN PGP SIGNATURE----- Version: PGPfreeware 6.5.8 for non-commercial use <http://www.pgp.com>; iQA/AwUBOrguHikK9qTvGvteEQLkbQCff0cXie1gkJPDJoeR5e720E4y76oAnRCQ kvWldw9IiINu5AQkijx+G3/+ =wdkL -----END PGP SIGNATURE----- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?MPEGJCJPPBKNCNBGOHGDKEEICNAA.cschreiber>