Re: gcc -Os optimisation broken (RELENG_4)
David O'Brien wrote/schrieb (Saturday, March 18, 2000): | On Sat, Mar 18, 2000 at 03:18:45AM +0100, Thomas Köllmann wrote: | | Perhaps this is a bit off topic, but can the pentium optimisations be | | used for AMD K6 processors? | | I did a `make world' yesterday with | CFLAGS= -O2 -pipe -march=pentium | COPTFLAGS= -O2 -pipe -march=pentium | ..snip.. | If it doesn't I'll probably try `-03 -pipe -march=pentium' come next | | What are people hoping to get by doing this? Are you actually doing a | scientific performance evaluation between the various optimization | options??? This is just playing, the machine I was talking about has it's backups in order and can afford downtime; I mentioned that already, and I was only answering somebody's question. | Are are people just being macho, and thinking they are | getting all this non-existent performance increase? You _are_ feeling strong about this, aren't you? :-) | "-O" is the only globally safe optimization on FreeBSD. -O2, etc.. | causes various problems for various people in various ports, and parts of | /usr/src/. If people are using these options just for fun, that is fine, Yes, just for fun, David, just for fun. | BUT if you experience *any* problems with compiling using -O2, etc.. | don't bug this list -- go bug the GCC people. Are they a bunch of machos themselves? :-) Thanks for your point of view. Gruß - Thomas -- Walking to the car, she takes his hand and puts it, for a moment, lightly between her moving legs. Roger's heart grows erect, and comes. That's really how it feels. -- Thomas Pynchon, Gravity's Rainbow # PGP key sent on request / PGP key auf Wunsch per e-mail To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: gcc -Os optimisation broken (RELENG_4)
I wrote/schrieb (Saturday, March 18, 2000): | R Joseph Wright wrote/schrieb (Friday, March 17, 2000): | | | In contrast, I've been using -Os -march=pentium during the last three | | months for buildworld and the kernel. Never had problems whatsoever. | | | | Perhaps this is a bit off topic, but can the pentium optimisations be used | | for AMD K6 processors? | | I did a `make world' yesterday with | CFLAGS= -O2 -pipe -march=pentium | COPTFLAGS= -O2 -pipe -march=pentium | (inspired by recent mention of optimizing on this list) on my | AMD-K6(tm) 3D processor (350.80-MHz 586-class CPU) | desktop machine. It still runs, but I'll have yet to see whether | this will cause any suspicious behaviour. [...] I've just learned that there is a `-march=k6' even though the man page for gcc-2.95.1 does not mention it... Gruß - Thomas -- Den Wein, den listigen Tröster bat ich oft, | - Charles Einmal das Schrecknis, das mich quält, zu stillen, | Baudelaire, Jedoch er schärft den Sinn, statt zu verhüllen | Die Blutquelle # PGP key sent on request / PGP key auf Wunsch per e-mail To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: gcc -Os optimisation broken (RELENG_4)
R Joseph Wright wrote/schrieb (Friday, March 17, 2000): | In contrast, I've been using -Os -march=pentium during the last three | months for buildworld and the kernel. Never had problems whatsoever. | | Perhaps this is a bit off topic, but can the pentium optimisations be used | for AMD K6 processors? I did a `make world' yesterday with CFLAGS= -O2 -pipe -march=pentium COPTFLAGS= -O2 -pipe -march=pentium (inspired by recent mention of optimizing on this list) on my AMD-K6(tm) 3D processor (350.80-MHz 586-class CPU) desktop machine. It still runs, but I'll have yet to see whether this will cause any suspicious behaviour. If it doesn't I'll probably try `-03 -pipe -march=pentium' come next `make world' time, but this all is about a machine that has it's backup mechanisms (hopefully) and can afford a little downtime. Gruß - Thomas -- On the way downtown I stopped at a bar and had a couple of double Scotches. They didn't do me any good. All they did was make me think of Silver-Wig, and I never saw her again. -- Raymond Chandler, The Big Sleep # PGP key sent on request / PGP key auf Wunsch per e-mail To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
