Date: Wed, 13 Aug 2003 18:38:32 +0200 From: Thomas Moestl <t.moestl@tu-bs.de> To: harti@freebsd.org Cc: sparc64@freebsd.org Subject: Re: ponderous 'make world' times post GCC 3.3... Message-ID: <20030813163832.GA779@crow.dom2ip.de> In-Reply-To: <20030813180823.W97608@beagle.fokus.fraunhofer.de> References: <20030807062536.GA68747@dragon.nuxi.com> <p052106c7bb59ce43912c@[128.113.24.47]> <20030812213355.M22214@seekingfire.com> <20030813154823.GA99828@energistic.com> <20030813155523.GB99828@energistic.com> <20030813175634.P97608@beagle.fokus.fraunhofer.de> <001501c361b4$f84e6280$2bd90c42@officescape.net> <20030813180823.W97608@beagle.fokus.fraunhofer.de>
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On Wed, 2003/08/13 at 18:12:09 +0200, Harti Brandt wrote: > On Wed, 13 Aug 2003, Steve Ames wrote: > > SA> > SA>----- Original Message ----- > SA>From: "Harti Brandt" <brandt@fokus.fraunhofer.de> > SA>> I have actually two machines and two kernels: one machine runs with > SA>> WITNESS and DIAGNOSTICS and the other without that. On both machines > SA>> the current kernel is three times slower than the old kernel. Of course > SA>> the debugging kernels are even slower than the non-debugging ones. But, > SA>> the three times ratio between old and new kernels is the same on both > SA>> machines. > SA> > SA>Ah. Well that blows my theory :) However... in January my system took around > SA>4 hours to do 'make world' and it still does with today's code (if I don't > SA>have > SA>debug options turned on). So I'm not sure there is a global 3x increase. > > Well, you're the 2nd one who reports that nothing has changed. Several > people however report, that they see the 3x increase. And I see it myself, > no matter how often I look at this. Today I tried to build the vinum > module: > > gcc-3.3.1 yesterday's kernel 132 + 85 + 20 > gcc-3.2.2 yesterday's kernel 131 + 85 + 22 > gcc-3.2.2 kernel from June 1st 52 + 27 + 7 > > Exactly the same config and the same world (except for gcc). > > This is an Ultra10. Perhaps it depends on the sparc model? FWIW, I'm not seeing this either on my Blade 100; with kernels from Jun 1 and Aug 11, both built with gcc 3.3.1, a complete kernel build takes the same time down to a few seconds. I'm running world builds right now. It would be very interesting if you could narrow the change down to a shorter time span by binary search. - Thomas -- Thomas Moestl <t.moestl@tu-bs.de> http://www.tu-bs.de/~y0015675/ <tmm@FreeBSD.org> http://people.FreeBSD.org/~tmm/ PGP fingerprint: 1C97 A604 2BD0 E492 51D0 9C0F 1FE6 4F1D 419C 776C
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