Message boards :
Number crunching :
Is doing CPU WUs worth it, if you do GPU WUs?
Message board moderation
Author | Message |
---|---|
Send message Joined: 14 Jul 09 Posts: 6 Credit: 13,085,618 RAC: 0 |
Is it even worth it for me to crunch CPU WUs if I can crunch GPU ones? Are there some WUs that *need* to be processed by a CPU, or are those WUs only made for people without GPUs essentially? Basically are these resources better spent just going towards a CPU only project (and might they take away what Milkyway gets on the GPU?). Just - is there honestly a reason for me to crunch CPU WUs for Milkyway if I can crunch GPU ones as well? |
Send message Joined: 18 Jul 09 Posts: 300 Credit: 303,562,776 RAC: 0 |
N-body work units need to be crunched with a CPU. Whether or not it's "worth it" for you to crunch them is up to you. |
Send message Joined: 21 Sep 11 Posts: 41 Credit: 185,458,736 RAC: 0 |
Short answer: probably not. Long answer: It depends on how much it takes away from the CPUs feeding the GPUs. My rule of thumb is 1 (dedicated) core per GPU. I found that 4x Radeon 6950's being fed by a quad-core i7, slowed their throughput more than the microscopic credit earned by running CPU-only tasks in tandem. |
Send message Joined: 22 Jan 11 Posts: 375 Credit: 64,657,871 RAC: 0 |
Does depend on the GPU somewhat, older GPUs don't really need a dedicated CPU core, my HD 4870 used to run at nr 100% load with all my CPUs running Folding or Asteroids. My 5850 though is at ~80% load. However my rigs totally output between the 2 projects is higher leaving all cores crunching. Tony What would your 6950s load be at if you crunched with all CPU cores? Team AnandTech - SETI@H, DPAD, F@H, MW@H, A@H, LHC, POGS, R@H, Einstein@H, DHEP, WCG Main rig - Ryzen 5 3600, MSI B450 G.Pro C. AC, RTX 3060Ti 8GB, 32GB DDR4 3200, Win 10 64bit 2nd rig - i7 4930k @4.1 GHz, HD 7870 XT 3GB(DS), 16GB DDR3 1866, Win7 |
©2024 Astroinformatics Group