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Old 2012-12-10, 09:57   #1
NBtarheel_33
 
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Question How is GIMPS' sustained throughput defined?

http://www.mersenne.org/primenet/ is reporting that we are running at
  • 99.127 TFLOP/sec over the last 24 hours,
  • 107.404 TFLOP/sec over the last 7 days, and
  • 98.339 TFLOP/sec over the last 30 days.
Which of these metrics would be reported as GIMPS' sustained throughput (if we were comparing to a supercomputer, for example)? Certainly the monthly throughput would be a fair candidate, possibly even the weekly throughput. I am wondering because, as far as I know, GIMPS has never broken the 100 TFLOP/sec barrier for sustained computation until just recently. In fact, I believe that when (it's getting closer) the monthly throughput breaks 100 TFLOP/sec, that will be the first time that's ever happened. So it seems as though this is certainly a milestone for GIMPS, and would seem to indicate that our ranks are increasing, which is a good thing. (Note another recent milestone: there are now over 700,000 registered CPUs crunching for GIMPS, many of them likely multi-core systems!)

Quote:
Originally Posted by Peter Nelson, November 2005, when GIMPS' sustained throughput was struggling to reach 20 TFLOPS View Post
...I think we can go well beyond 100TFLOPS one day.
Personally, I think we will go petascale by 2020, with 100-million-digit tests becoming 8- to 12-week, mainstream assignments by 2017. All hail GPUs!

Now if only George could port Prime95 to smartphones and tablets. The Samsung Galaxy IV is slated to have a quad-core processor and over 1GB of RAM. P-1 on a *phone* is becoming theoretically feasible!
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Old 2012-12-10, 14:24   #2
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P-1 on a phone would kill the battery. It'd overheat, and if it didn't, it wouldn't last more than an hour.
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Old 2012-12-10, 14:27   #3
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Quote:
Originally Posted by c10ck3r View Post
P-1 on a phone would kill the battery. It'd overheat, and if it didn't, it wouldn't last more than an hour.
plug it into it's charger ? if the battery goes low, as to the overheat scenario I'm unsure
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Old 2012-12-10, 15:31   #4
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the easiest solution would be P-1 that take less than one hour.
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Old 2012-12-10, 16:37   #5
henryzz
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I did a LL test on a phone that took over 24 hours once.
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Old 2012-12-10, 19:32   #6
kracker
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I have a 1.3 GHz quadcore on a tablet..... wish it could be used somehow.
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Old 2012-12-11, 20:29   #7
NBtarheel_33
 
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The interesting thing is that, IIRC, Android is very similar to (a derivative of?) Linux. So it makes me wonder how hard it would actually be to port something like mprime to the Android platform. Obviously, cooling would be a major issue, as there are no heatsinks or fans in a phone, let alone how hot the battery would be getting. Perhaps a dry ice cooling solution?

Back on topic: still haven't breached 100 TFLOP/s sustained for a month. Numbers right now are 112.127 today/105.327 week/98.674 month.
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Old 2012-12-11, 21:48   #8
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Quote:
Originally Posted by NBtarheel_33 View Post
The interesting thing is that, IIRC, Android is very similar to (a derivative of?) Linux. So it makes me wonder how hard it would actually be to port something like mprime to the Android platform. Obviously, cooling would be a major issue, as there are no heatsinks or fans in a phone, let alone how hot the battery would be getting. Perhaps a dry ice cooling solution?
Android is a derivative of Linux; for a while the changes weren't being back ported to Linux, but IIRC recently Torvalds told everyone to STFU about Google and just accept their code. So now Android uses the "vanilla" Linux kernel as its code base.
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Old 2012-12-13, 05:04   #9
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2012-12-13 0400 GMT: ~99.5 TFLOP/s sustained for the last 30 days.
2012-12-13 0500 GMT: ~99.7 TFLOP/s sustained for the last 30 days.

Will probably break 100 in the next few hours. For the last 24 hours, we are at 130+ TFLOP/s.
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Old 2012-12-13, 05:20   #10
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Quote:
Originally Posted by NBtarheel_33 View Post
The interesting thing is that, IIRC, Android is very similar to (a derivative of?) Linux. So it makes me wonder how hard it would actually be to port something like mprime to the Android platform. Obviously, cooling would be a major issue, as there are no heatsinks or fans in a phone, let alone how hot the battery would be getting. Perhaps a dry ice cooling solution?
Quote:
Originally Posted by Dubslow View Post
Android is a derivative of Linux; for a while the changes weren't being back ported to Linux, but IIRC recently Torvalds told everyone to STFU about Google and just accept their code. So now Android uses the "vanilla" Linux kernel as its code base.
The most difficult would be porting the high-optimized-for-x86 assembler part to ARM or whatever CPU's those mobiles have (TI's Neon GPU's or even Tegra3? )
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Old 2012-12-13, 10:51   #11
NBtarheel_33
 
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As of 2012-12-13 1000 GMT, PrimeNet is reporting that we have sustained 100.147 TFLOP/s for the last 30 days!!

More interestingly, in the last 24 hours, we are outperforming our theoretical maximum capacity: 145.277 TFLOP/s actual with only 130.277 TFLOP/s max capacity!

Onward and upward...
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