Folding Forum

Not a complaint, just an observation from a WU I had to dump: 16781 had a TPF of nearly 40 minutes and resource utilization was low, indicating that it's not particularly efficient on this GPU compared to other projects of similar atom count and number of steps. I'm sure it will fold with ease when...

Well, it is not quite like NUMA. Yes, synchronization across CCDs can be expensive, but memory access speed should be uniform, if I understand it correctly?

When I pin all threads but one to a single core, the remaining thread drops to around 70%. I believe that is because it exceeds the limit of the load balancer. I'll check the source code to make sure, but I don't think it is using spinlocks. Maybe it doesn't use spinlocks indeed, but still somethin...

Sadly I don't have a Linux machine to test it right now, but try running a WU with 4 threads, and pin them in the following configuration: thread 0 - cpu 0 thread 1 - cpu 1 thread 2 - cpu 2 thread 3 - cpu 2 You will quickly notice that threads 0 and 1 still keep using 100% of CPU time, although comm...

Well, it definitely uses a mutex under the hood for something, but the main question I have: if the quicker threads slow down (which they definitely do, I agree), why do they still run 100% of the time instead of sleeping on a mutex?

The biggest issue in my eyes is that GROMACS threads for some reason just sit in infinite busy poll and wait until all threads finish their slice of work, instead of yielding and waiting on e.g. a mutex. This design choice denies slower threads a chance to access a free/quicker CPU and finish job fa...

I think the client doesn't change the parameters it requests on the fly, while being in the request loop. That's why pausing, then changing the amount of CPUs and unpausing it again might actually fix the problem.

This concept is really stupid and I don't understand why they made it so complicated

wait, don't you have GTT to extend the video memory? you can use radeontop tool to read the amount of available GTT. If there is none, you could specify more via amdgpu.gttsize module parameter: https://www.kernel.org/doc/html/v6.14/g ... eters.html

I've found that the best way to make use of that architecture is to run one WU on the P-cores and one on the E-cores, assuming the system has sufficient cooling capacity to maintain boost rates on all cores, otherwise the heat from the E-cores causes the P-cores to throttle. But if cooling is suffi...

Since we are already here, should core 26 jobs be public, too? They were recently phased away but now I am receiving them again.

Linux shows many numbers which I don't understand. If you use htop to look into memory usage, your point of interest is RES (residential memory). That's the actual physical memory used by a process at the moment of observation (yes, it is slightly more complicated than that, just as everything else...

If you run a process with Realtime priority, then you should definitely expect audio hangs :) And even if you pin fah core to a single cpu, it might still cause issues, because a Realtime process might interfere with audio-related DPC calls. So, yeah, don't use Realtime. If you want to give fah prio...

I think with modern "thermally optimized" hardware the only concern around laptops is the battery. It might not like high temperatures, otherwise I don't really see any problems with laptop folding.

Yes, I agree, 740M sharing PCI IDs is very annoying