Date: Sat, 21 Mar 1998 14:09:00 -0800 (PST) From: Simon Shapiro <shimon@simon-shapiro.org> To: Brian Tao <taob@nbc.netcom.ca> Cc: current@FreeBSD.ORG, Andrew Reilly <reilly@zeta.org.au> Subject: Re: Worldstone Continued... Message-ID: <XFMail.980321140900.shimon@simon-shapiro.org> In-Reply-To: <Pine.GSO.3.96.980321141849.27498K-100000@tor-dev1.nbc.netcom.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
On 21-Mar-98 Brian Tao wrote: > On Thu, 19 Mar 1998, Andrew Reilly wrote: >> >> It would be interesting to see a "speed of light" figure for >> buildworld. I note that there are some people on this list with >> access to machines with seriously big DRAM (.5G?) on their systems. >> I doubt that any one compile operation exercises more than a few >> Meg, with -pipe. > > If you have that much RAM to spare on a system, make a 384MB > memory filesystem, and stick /var/tmp, /usr/obj and /usr/src on it. > Then try a buildworld and see how fast it goes. /usr/obj and /usr/src > should fit in 384MB. My very humble opinion is that we are barking up the wrong tree. Disk I/O is not the limiting factor here. I am looking at disk bandwidth utilization of less than 20%. From idle observation, it appears that parsing Makefiles is 4-5 times the amount of time it takes to actually compile anything. The curious could take the kernel directory and write a simple script to compile it without make at all. Tell us the results. Simon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.980321140900.shimon>