Message boards :
Number crunching :
How is this possible?
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Author | Message |
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Send message Joined: 16 Mar 09 Posts: 21 Credit: 52,815 RAC: 0 |
Hi sorry if this is in the wrong place I just joined so I don't know too much here but I was looking at a few computers on here and saw some that were finishing in 3 seconds! How is that possible or is it a glitch? here is an example http://milkyway.cs.rpi.edu/milkyway/results.php?hostid=56345&offset=40 And this is very crazy http://milkyway.cs.rpi.edu/milkyway/show_user.php?userid=1231 this guy has 730,000 RAC!!! |
Send message Joined: 4 Jul 08 Posts: 165 Credit: 364,966 RAC: 0 |
Nope no glitch mate, they would be using the ATI GPU app from Cluster Physik |
Send message Joined: 28 Apr 08 Posts: 1415 Credit: 2,716,428 RAC: 0 |
Those computers are running an optimized GPU app. Some WU's finish in less than 1 second I've heard. |
Send message Joined: 16 Mar 09 Posts: 21 Credit: 52,815 RAC: 0 |
Thanks for the quick replys! now if I was to get a new computer what would do this any new NVIDIA card or is this just on ATI cards? |
Send message Joined: 27 Aug 07 Posts: 915 Credit: 1,503,319 RAC: 0 |
Those computers are running an optimized GPU app. Some WU's finish in less than 1 second I've heard. That's CPU time, which is basically the amount of communication taken between the CPU and the GPU. The 'wall clock' time will be longer. me@rescam.org |
Send message Joined: 6 Apr 08 Posts: 2018 Credit: 100,142,856 RAC: 0 |
Those computers are running an optimized GPU app. Some WU's finish in less than 1 second I've heard. Yes, the actual processing time of a WU is around 12 seconds, depending on which ATI card you have, how much you have it clocked, and what else is is going on in your computer at the time. I've recorded as low as 8 seconds, but then the WUs have been getting bigger, and it's difficult to time the WU's when 2 or more are processing at the same time. |
Send message Joined: 12 Apr 08 Posts: 621 Credit: 161,934,067 RAC: 0 |
Upcoming changes in the BOINC Manager will have it tracking wall clock time if I have followed the discussions on-line about the direction of the developers. THis will end the distinction between CPU time and the time on the GPU ... how this is going to affect the credit claiming and granting process is not yet clear ... |
Send message Joined: 24 Dec 07 Posts: 1947 Credit: 240,884,648 RAC: 0 |
So does wall clock time include or exclude time spent waiting to crunch or is it only the wall clock time while the wu is active? |
Send message Joined: 12 Apr 08 Posts: 621 Credit: 161,934,067 RAC: 0 |
So does wall clock time include or exclude time spent waiting to crunch or is it only the wall clock time while the wu is active? While active if I understand it correctly... As usual, this is one of those off-hand notes that Dr. Anderson prefers ... so, I don't know what it will really mean or portend. |
Send message Joined: 4 Jul 08 Posts: 165 Credit: 364,966 RAC: 0 |
Only ATI at this stage |
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