Posts by McShane of TSBT

1) Questions and Answers : Windows : Not requesting Tasks (Message 150)
Posted 22 Jan 2022 by McShane of TSBT
Post:
My 32 Core Windows machine does not like the Computation project but has no problems with the measurement ones.

I am receiving a message: Not requesting tasks: don't need (CPU, NVIDIA GPU).

Is there anything I can do to get this machine to run the Computation project?


Loos like I found a problem that no body else has....
2) Questions and Answers : Windows : Not requesting Tasks (Message 149)
Posted 19 Jan 2022 by McShane of TSBT
Post:
My 32 Core Windows machine does not like the Computation project but has no problems with the measurement ones.

I am receiving a message: Not requesting tasks: don't need (CPU, NVIDIA GPU).

Is there anything I can do to get this machine to run the Computation project?
3) Message boards : Number crunching : Memory problems (Message 132)
Posted 3 Dec 2021 by McShane of TSBT
Post:
My current configuration: 128 thread machine with 64Gb of RAM. I am only able to run 39 iThena threads, the rest are waiting for memory, and that is the only project that I am running.

How do I tell iThena to run only 39 threads, so that I can use the other 89 threads for other projects. ?
4) Message boards : Number crunching : Somewhat limiting.... (Message 129)
Posted 1 Dec 2021 by McShane of TSBT
Post:
Agreed. It seems that these tasks have a very wide range of run times depending on the computer, and your estimate and max run time limit are too low.



Also, these tasks are actually using more than one CPU thread per task. On the E5-1650 with 6 cores/12 threads I had to reduce the number of running tasks down to 8 before the total CPU usage dropped below 100%. On the 3900X with 12 cores/24 threads, I had to drop it down to 18 running tasks to get the total CPU usage below 100%.

If the tasks were actually just using one CPU thread each, the totals would have dropped below 100% at 11 tasks on the E5-1650 and 23 tasks on the 3900X...

This might explain the higher run times than the original estimate as well. For those of us who usually run a number of tasks equal to the number of CPU threads, the tasks aren't getting the amount of CPU time that they want.


Pardon my ignorance but how do you reduce the number of running Tasks?
5) Message boards : Number crunching : Memory problems (Message 128)
Posted 1 Dec 2021 by McShane of TSBT
Post:
You have ~500mb per thread while each takes 307mb for me in Linux. Minus OS, GPU, other stuff and BOINC setting to not use all 100%, then yeah. Normal.


So, the answer seems to be to run only about a third of your available cores or just one or two project thread using app_config.xml. The trouble is that I bet most users have no idea how to set up an app_config. What a waste of resources...
6) Message boards : Number crunching : Memory problems (Message 126)
Posted 30 Nov 2021 by McShane of TSBT
Post:
I am running an AMD Ryzen threadripper x3980 64 Cote 128thread machine with 64 Mb RAM.

Is it normal that I can only run 54 threads and the rest waiting for memory?




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