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Posts by Erico

1) Message boards : Number crunching : Need to know what other projects use the GPU so I can troubleshoot an issue (Message 67358)
Posted 19 Apr 2018 by Erico
Post:
Thanks. I hadn't noticed the Add a Project page on BOINC has a Nvidia icon for GPU projects, my bad!

Anyway, the problem persists on another GPU project, so I made a thread about it: https://boinc.berkeley.edu/dev/forum_thread.php?id=12415#85934

Thanks.
2) Message boards : Number crunching : Need to know what other projects use the GPU so I can troubleshoot an issue (Message 67351)
Posted 18 Apr 2018 by Erico
Post:
For some reason, when running M@H, my GTX 970's GDDR RAM frequency runs at 3005 MHz vs. the 3505 MHz stock. Since M@H is the only project on BOINC that I know that uses the GPU, I can't test if this is M@H-specific or BOINC-specific. Could anyone kindly tell me another project that uses the GPU? Thanks.
3) Message boards : Number crunching : There's something VERY wrong with the "Top GPU models" list (Message 66560)
Posted 10 Aug 2017 by Erico
Post:
The universe where the 560 Ti (163.97 GFLOPS) has more double precision power than the 970 (109 GFLOPS).


Wouldn't that make its performance 60% better then, rather than marginally better as the table shows?

Edit: nevermind, it's probably due to the higher clock of the 970.
4) Message boards : Number crunching : There's something VERY wrong with the "Top GPU models" list (Message 66557)
Posted 9 Aug 2017 by Erico
Post:


Here is the list link: https://milkyway.cs.rpi.edu/milkyway/gpu_list.php

In what universe is a 560 Ti more productive than a 970? What is going on?
5) Message boards : Number crunching : M@H seems to be freezing the progress of other tasks (Message 66297)
Posted 14 Apr 2017 by Erico
Post:
C'mon folks, more ideas please! I still feel like I'm utterly wasting my processor's efforts.
6) Message boards : Number crunching : M@H seems to be freezing the progress of other tasks (Message 66296)
Posted 13 Apr 2017 by Erico
Post:
Your other project should be able to use the other 7 cores, unless it expects access to all 8 and refuses to run when one of them is unavailable.


That's the thing. Even though the cores are all running at full throttle, the progress for the CCG tasks won't update at all while the M@H GPU task is running. I reduced number of CPUs to 99% and now there are 7 CCG tasks instead of 8, and the progress of only one of them is slowly increasing while the M@H task runs. The others are still frozen.

If all of the CPU cores are busy, can you see which processes are using all that CPU time? (Task Manager, Processes, sort by CPU.)


There are 7 instances of "exact_client_0.20_windows_x86_64.exe" each using about 11% CPU. The M@H instance barely uses any CPU, oscillating betweeen 1 and 3%. Again, very strange that their progress bars should be frozen!
7) Message boards : Number crunching : M@H seems to be freezing the progress of other tasks (Message 66294)
Posted 12 Apr 2017 by Erico
Post:

Limit yourself to 1 or 2 tasks running on the gpu or else all the instances will be spinning on multiple cpu's waiting for the gpu to finish a call.


So I should cancel my Citizen Science Grid project and run only Milkyway@Home, is that what you mean?
8) Message boards : Number crunching : M@H seems to be freezing the progress of other tasks (Message 66292)
Posted 12 Apr 2017 by Erico
Post:
With your particular setup you might want to consider backing that off to 99% of the cpu's and let the gpu have one just for itself so it can stay fed and crunching at full speed and does not slow down while waiting for a cpu core to give it work. EVERYTHING on a pc goes thru the cpu, so even though the gpu has some processing units on it when the gpu needs new work or finishes a workunit it still has to communicate thru the cpu to do that. If the cpu is busy crunching a workunit itself then the gpu will sit idle until it gets time on the cpu.

One other setting you might consider is whether to run the N-Body workunits or not, they can take all of the cpu cores just to work on a single workunit, this works for some people but not for everyone. You will have to go thru your workunits and see if it is working for you.


I just set it to 99% in the options. Is that enough to guarantee the GPU gets all the CPU attention it needs or do I have to go to the config files to be able to dedicate a core to it?

I do occasionally get 8-core CPU tasks, yes.

No one has yet answered the main question of my post, though. Why is the M@H task consuming 100% of the CPU if it's supposed to be a GPU task?
9) Message boards : Number crunching : M@H seems to be freezing the progress of other tasks (Message 66289)
Posted 11 Apr 2017 by Erico
Post:
Have you configured your preferences so that you only get GPU work? There are CPU tasks for this project as well, including both single core tasks and multi-threaded ones.


Wouldn't that defeat the purpose? I want both my processor and GPU working at 100% all the time in order to contribute as much as I can to science, with GPU only tasks only a tiny fraction of the CPU would be used.

Thanks for your reply!
10) Message boards : Number crunching : M@H seems to be freezing the progress of other tasks (Message 66286)
Posted 10 Apr 2017 by Erico
Post:
(I have hyperthreading, thus the 8 projects)


Oops, I meant "8 tasks" here.
11) Message boards : Number crunching : M@H seems to be freezing the progress of other tasks (Message 66284)
Posted 9 Apr 2017 by Erico
Post:
Here is how my projects screen looks right now: http://prntscr.com/eud1xr

The M@H task is only supposed to use 0.608 of a CPU thread right? However, the percentages for the Citizen Science Grid tasks won't budge at all until the M@H project finishes, at which point they progress a little bit and freeze again when M@H starts a new task.

Another problem is, all my four cores (I have hyperthreading, thus the 8 projects) are always working at 100% throughout. I'm worried, thus, that this effort is being wasted! What's going on?

I have a GTX 970 and a core i7 3750 with the latest BOINC Manager version on Windows 7.

Thank you!




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