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What are the per WU memory requirements for the various applications?
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 RafaelVolunteer tester
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What are the per WU memory requirements for the various applications?
"Memory" as in RAM (just in case you're referring to HD space)? Also, you mean "requirements" as in "the minimum necessary" or "what helps improve performance", as the first one is trivial and the second one takes a bit more explaining. |
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Minimum RAM requirements per WU and, if you're offering, what amount/speed helps improve performance.
Thank you.
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Michael Goetz Volunteer moderator
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Minimum RAM requirements per WU and, if you're offering, what amount/speed helps improve performance.
Thank you.
The amount of memory will not affect performance.
On AVX-capable Intel CPUs, for all LLR tasks and GFN-21 CPU tasks, memory speed is critical. That means you want to get the fastest ram possible, and as many memory channels as possible. 2 channels is better than 1, and 4 channels is better than 2. Note that "channel" is not the same thing as "sticks".
AMD CPUs, and non-AVX Intel CPUs, aren't nearly as fast as AVX capable Intel CPUs, so I'm not sure how beneficial high speed memory is on those systems.
As for memory requirements, most of our apps need relatively modest amounts of memory. Most LLR and GFN apps need only about 100 MB of ram at most. Off the top of my head I'm not sure about the others. None are really outrageous, however.
Unless you're doing something unusual, you won't have any trouble with your computers running out of memory with our tasks. At least not with the computers I can see.
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Thank you for the prompt response and clarification.
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michael I found a ryzen system running 3200mhz ram and I'm stuck on 2133 until asus releases a functioning bios, the time difference between my ryzen 2133mhz vs 3200mhz ram was over 20% increase. but 2133 to 2666 which is what I used to be able to run ram at was less then 8% change. So how much it changes I'm not sure but faster ram has a noticeable effect on zen architecture. |
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Guy
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I'm learning all sorts of interesting things about the way PrimeGrid works. I'm currently running six PPS-Mega tasks and one PPS-Sieve. When I suspend three of the six PPS-Mega tasks, my computers fans all spin up and get louder. This backs up Michael's statement that RAM speed is the bottleneck with a lot of these tasks. The three remaining running tasks are getting double the bandwidth (roughly) and are thus able to push the CPU harder.
I think... |
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Dave
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Suddenly it is realised that we are using our machines as *compute*rs, not just a browser in a great big beige doorstop of a box. |
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