On Mon, 25 Sep 2006, Dag-Erling Sm?rgrav wrote: DS> > > > My experiments show that if you have enough memory to host radmdrive for DS> > > > /usr/src you'd better leave it for caching - there were no statistically DS> > > > meaningful performance difference, at least on machines with 1G+ RAM. DS> > > Really? My measurements show the opposite (on a system with 16GB of DS> > > RAM). DS> > My last test on amd64/dualcore with 4G of RAM and -j4 shows DS> > (buildworld+buildkernel): DS> > DS> > ==> /tmp/buildlog <== DS> > 1996.45 real 3032.94 user 624.83 sys DS> > Script done on Tue Sep 19 14:44:54 2006 DS> > DS> > ==> /tmp/buildlog.md <== DS> > 1957.45 real 3033.93 user 585.78 sys DS> > Script done on Tue Sep 19 15:20:42 2006 DS> > DS> > Second one was with 512M/4k/512 swap-backed md, the former with /usr/src on the DS> > gmirror'ed pair of SATAs. DS> DS> Seems to me that your own numbers contradict you. You saved about 40 DS> seconds (2%) by keeping /usr/src in a ram disk.
Well, maybe I did used wrong wording (2% is statistically meaningful), but for me 2% is not worth all the efforts needed to organize ram disk infrastructure... Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- [EMAIL PROTECTED] *** ------------------------------------------------------------------------ _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
