Message boards : Number crunching : RAC dropping
Author | Message |
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Tigers_Dave Send message Joined: 26 Oct 22 Posts: 46 Credit: 7,434,087,095 RAC: 24,460,700 |
Anyone else notice that their Amicable RAC has been dropping? Mine has dropped more than 20% since February 2. I only crunch GPU tasks for Amicable and Amicable is the only project that uses my GPUs. TIA for any ideas. I apologize if this has already been extensively discussed. |
Sergei Chernykh Project administrator Project developer Send message Joined: 5 Jan 17 Posts: 531 Credit: 72,451,573 RAC: 0 |
It depends on which number ranges the project is checking. Some are slower, some are faster. Thankfully, part 3 WUs are much more uniform, and I tweaked them to be a bit faster than what part 2 has. |
Tigers_Dave Send message Joined: 26 Oct 22 Posts: 46 Credit: 7,434,087,095 RAC: 24,460,700 |
It depends on which number ranges the project is checking. Some are slower, some are faster. Thankfully, part 3 WUs are much more uniform, and I tweaked them to be a bit faster than what part 2 has. Thanks for the explanation. Glad to hear it is not a problem with my machines. |
Tigers_Dave Send message Joined: 26 Oct 22 Posts: 46 Credit: 7,434,087,095 RAC: 24,460,700 |
It depends on which number ranges the project is checking. Some are slower, some are faster. Thankfully, part 3 WUs are much more uniform, and I tweaked them to be a bit faster than what part 2 has. My RAC has more than doubled in the last 7 days. It certainly appears that recent WUs are being crunched more quickly than the WUs I was crunching last week. I am going to look at my recent results to see if I am on track to hit my all-time high in Amicable throughput, which I achieved between January 26 and February 2. |
gotaway Send message Joined: 3 Jan 24 Posts: 1 Credit: 17,302,406 RAC: 0 |
I'm using CPU only (spare threads on a dual Xeon setup), and since the change to part 3 (around 27/28 March) my RAC has dropped to about a quarter of that previously. No changes on hardware / resource allocation. Is this normal? |
Sergei Chernykh Project administrator Project developer Send message Joined: 5 Jan 17 Posts: 531 Credit: 72,451,573 RAC: 0 |
Part 3 WUs are much faster on GPUs compared to CPUs. I might launch the CPU-only application to search for the remaining amicable pairs (m=m1*p where p > 1014) before the part 3 finishes to give some meaningful work to CPUs. But it's not ready yet because I still need to find a good way to parallelize it. |
Message boards : Number crunching : RAC dropping
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