MacOS PPC S5R3 "power users" App 4.29 available

Bernd Machenschalk
Bernd Machenschalk
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Topic 13647

This App features a hand-crafted AltiVec "Hot-Loop" and autovectorization for the rest of the code. It should run on all G4 and G5 systems running MacOS 10.3 or newer. Besides that, it's a "separate graphics" App.

Speedup looked impressive on my G4 PowerBook.

The App will badly crash on G3 and might not run as intended on G4/G5. Only run this if you're sure of what you're doing.

Find it on the Power User Apps page.

Happy crunching!

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Bernd Machenschalk
Bernd Machenschalk
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MacOS PPC S5R3 "power users" App 4.29 available

Looks like there's not much benefit on G5. Anyone running this on G4?

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Bernd Machenschalk
Bernd Machenschalk
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Credit: 25,950,161
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RE: While the screensaver

Quote:
While the screensaver work correctly with this new app on Mac OS X 10.5.1 (leopard) (with the standard app on leopard the screensaver does not work properly)


What's the problem with the screensaver of the standard App? Actually I never heard of any problem with graphics on MacOS. I'm inclined to think that it's more an issue of the BOINC core client than of the App, certain versions had problems on Leopard.

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Bernd Machenschalk
Bernd Machenschalk
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RE: Martin.P it's

Quote:
Martin.P it's surprizing that you have a 20% speed boost whereas other crunchers doesn't; is it same size of WU for each ?


I really think there is significant speedup on G4 while almost none on G5, probably due to the second FPU the G5 has.

Martin.P, you're running a G4, right?

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Bernd Machenschalk
Bernd Machenschalk
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RE: Bernd; it's surprizing

Quote:
Bernd; it's surprizing that a vectorized app has no gain while the S5R2 vectorized app was 60% faster.


Yes, it is. I could understand that on a G5 which has two FPUs the overhead of the vector code makes up for the 4x speedup in that (small but important) part of the code, but on G4 I still have no clue.

Note that the checkpoints of 4.03 and 4.29 are incompatible. Therefore the app_info.xml is created so that tasks that were assigned to 4.03 are finished with the actual 4.03 App, not the 4.29 running under the 4.03 label. But you did take this into account, didn't you?

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Bernd Machenschalk
Bernd Machenschalk
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Well, I'm actually a bit

Well, I'm actually a bit behind with development on the PPC front. There's still room for improvement, but I currently don't know when I'll come to it in the next weeks.

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Bernd Machenschalk
Bernd Machenschalk
Joined: 15 Oct 04
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Credit: 25,950,161
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The 4.29 is now part of the

The 4.29 is now part of the new 4.41 App (out for Beta Test).

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