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Macintosh :
What's wrong with my Mac?
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Author | Message |
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Jorge Ferraz de Oliveira Send message Joined: 16 Apr 12 Posts: 2 Credit: 70,705 RAC: 0 |
Hi everybody... Something is puzzling me. I have a Dual 1.25 GHz PowerPC G4, with 1 MB L3 Cache per processor, 768 MB DDR SDRAM of memory, running under Mac OS X 10.4.1. I dowloaded yesterday the 6.12.35 version of Boinc Manager (Darwin 8.11.0) and started to run SETI@home. I must say I was disappointed in terms of speed. Indeed, each processor, running at 100%, is taking some 45 hours (!) to process a block of data... However, when I run a CPU I get the following results: - 797 floating point MIPS (Whetstone) per CPU - 2437 integer MIPS (Dhrystone) per CPU It is not an awesome speed, I agree, but I've seen worse... I also have a more modern machine, a portable PC with a GenuineIntel Intel(R) Core(TM) i7 CPU Q 720 @ 1.60GHz [Family 6 Model 30 Stepping 5](8 processors) running SETI@home. For this machine the benchmark results are: - 1492 floating point MIPS (Whetstone) per CPU - 7285 integer MIPS (Dhrystone) per CPU Only the double per CPU as for the Mac, but in this case, each processor finishes a block of SETI data in approximately 2:30h (the NVIDIA GPU takes around 40 minutes). So, anybody can tell me what's wrong with my Mac? Thanks in advance, Jorge |
Gundolf Jahn Send message Joined: 19 Sep 00 Posts: 3184 Credit: 446,358 RAC: 0 |
Did it really use those 45 hours or was that only an estimate? Gruß, Gundolf |
Jorge Ferraz de Oliveira Send message Joined: 16 Apr 12 Posts: 2 Credit: 70,705 RAC: 0 |
Hi, Gundolf: Thank you for your attention to my problem. Answering to your question, it is an estimate, since none of the two calculations has yet finished. I started SETI@home on my Mac yesterday, stopped overnight and restarted it again this afternoon. One of the processes is running for 10:55 hours and completed only 28.25% of the job. The other in running for 10:03 hours and solely completed 19.18% of the task. Very odd, indeed... Regards, Jorge |
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