Date: Wed, 9 May 2001 19:32:12 +1000 (EST) From: Bruce Evans <bde@zeta.org.au> To: Mikhail Teterin <mi@misha.privatelabs.com> Cc: eric@FreeBSD.org, mi@aldan.algebra.com, knu@iDaemons.org, will@physics.purdue.edu, sobomax@FreeBSD.org, kris@obsecurity.org, kris@FreeBSD.org, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: port policies Message-ID: <Pine.BSF.4.21.0105091924090.17145-100000@besplex.bde.org> In-Reply-To: <200105082029.f48KTtC38076@misha.privatelabs.com>
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On Tue, 8 May 2001, Mikhail Teterin wrote: > On 8 May, Eric Melville wrote: > >> All/most optimizations are done to work better in the _average_ case, > >> while still working acceptably in the worst cases. It remains my > >> believe, that -j2 on a single-CPU machine will _always_ work, and > >> on _average_ will work better. I'll be interested in seeing a > >> counter-example, but I must ask for NOT mentioning Redmond in any > >> rebbutals. Note, that simply working slower with -j2 does not > >> qualify. -j2 on a single-CPU machine with 2 disks (src on one, obj and root on the other) was a little slower and consumed more resources for makeworld the last time I checked. It might be faster because the disk(s) are too slow relative to the CPU and/or the VMIO cache is too small. It's hard to see how it could consume less resources. > > Don't do things that the user didn't ask to be done. > > > > If the user wants more excitment, we provide facilities that make it > > easy to do so. -j2 in .MAKEFLAGS in the user's environment should be interesting enough. > The user did not ask for ``-O -pipe'' in the CFLAGS either. -pipe, > consumes more memory, while -O makes compiling longer. Should the > default CFLAGS be empty too? By your logic, they should... CFLAGS should default to -O as specified by POSIX. -pipe is an implementation detail for one C compiler. Forcing it breaks other C compilers. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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