Date: Sun, 19 Feb 2012 00:15:24 -0500 From: Super Bisquit <superbisquit@gmail.com> To: "Kevin H. Patterson" <kpatterson.home@gmail.com> Cc: freebsd-ppc@freebsd.org Subject: Re: FreeBSD 9.0-RELEASE on PowerMac Dual G5 Message-ID: <CA%2BWntOtKvc6HMDoMNQj6AQtiA5kOXGrZqcnFcssuGs6nv_EimQ@mail.gmail.com> In-Reply-To: <3934AD65-E01C-4DDD-8BDC-F52C6AE3655F@khptech.com> References: <3934AD65-E01C-4DDD-8BDC-F52C6AE3655F@khptech.com>
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http://www.freebsd.org/cgi/url.cgi?ports/benchmarks/ubench/pkg-descr Notice that the description uses the word "senseless" more than once. Try compiling a program or a set of programs. On a low end B&W, I was able to compile firefox plus a few other applications. POWER/PowerPC is known for performance. The architecture is used in gaming systems for reason that it can pass instructions through once they are "learned." This may be a simplistic explanation of load-store but it is one you should be aware of. Both the Power and Power64 releases are Tier 2 and are worked on by a small group within the FreeBSD community. You can change the flags of make in /etc/make.conf if you wish. On 2/18/12, Kevin H. Patterson <kpatterson.home@gmail.com> wrote: > Hello, > > I've taken an interest lately in running FreeBSD on the powerpc64 > architecture. I have access to a dual 2.5 GHz PowerMac G5, and I've > successfully got FreeBSD 9.0-RELEASE up and running on it. > > Only one thing seems amiss so far... it feels *very* SLOW. I realize this is > an older machine, but it feels much too slow for a dual G5. Compiling seems > to take forever, and top shows ~50% or more "system" CPU usage when doing > almost anything other than sitting idle. Furthermore, the system fans never > speed up, but run at the lowest speed even when the system is under full > load. I have tried both enabling and disabling powerd support, with no > effect. > > For a quick sanity check, I installed ubench (0.32) from ports. The numbers > were quite disappointing: 109870 CPU / 50527 MEM multiprocessor, and 55433 > CPU / 30863 MEM single-processor. > > For comparison, I ran ubench (0.32 from MacPorts) under Mac OS X 10.5.8 on > the same machine. This time, the fans do ramp up, and the numbers are *WAY* > better: 277207 CPU / 317119 MEM multi-processor, and 141021 CPU / 284113 MEM > single-processor. > > As you can see, all is not well. I am wondering what is slowing FreeBSD down > on this machine. I have tried both GENERIC and my own kernel config. It > feels like the CPU and or bus speed is clocked down perhaps to the most > energy-saving level. Maybe this is where openfirmware leaves it after boot? > Also interesting is to note the drastic *single-processor* ubench difference > between macosx and freebsd. To me this looks like a low clock-speed smoking > gun. > > I also noticed that the kernel build includes flags like -msoft-float and > -mno-altivec... > > I am interested in any build or config tweaks that might be in order. I am > also more than happy to debug and get to the bottom of this. Any ideas? > > Sincerely, > > Kevin H. Patterson > KHPtech > > kevpatt@khptech.com > > _______________________________________________ > freebsd-ppc@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ppc > To unsubscribe, send any mail to "freebsd-ppc-unsubscribe@freebsd.org" >
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