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tomba

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Message 73139 - Posted: 22 May 2012, 8:44:37 UTC - in response to Message 73137.  

You can force BOINC to use 4 processors and see if that is acceptable.


BINGO!! That's exactly what I wanted:



I set 25% of the processors === two === and Task Manager tells me three are in use; two for Rosetta and one for GPUGRID. And there's no delay in normal work.

Perfect solution! Many thanks, Tom
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Mod.Sense
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Message 73144 - Posted: 22 May 2012, 23:23:52 UTC
Last modified: 22 May 2012, 23:25:58 UTC

Yes, so the one for GPUGrid is a small fraction of one CPU. The bulk of the work would be running on the GPU, not the CPU.

You can probably run somewhere between 5 & 7 CPUs and still have modest fan speed. Basically we're just saying that it is an exercise left up to you to determine how many CPUs brings you to acceptable fan noise. Only takes a few minutes after adjustment to find out.
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Ironworker16

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Message 79129 - Posted: 29 Nov 2015, 3:17:17 UTC - in response to Message 73133.  

I stopped running Rosetta many months ago when I bought an i7. Problem was that he grabbed all eight CPUs and the fan noise was unacceptable. I did try Tthrottle but that affected all CPUs and my normal work was downgraded significantly.

Is there a way to assign n CPUs to Rosetta where n = Fan Noise OK?

Thanks, Tom


Create an empty text file in the folder for this project and paste the following into the file and save it named as app_config.xml, change the number in max concurrent to the number of cores you want, then stop the client and start the client again or under Options in the Advanced View click Read config files to make it work.

<app_config>
<app>
<name>minirosetta</name>
<max_concurrent>1</max_concurrent>
</app>
</app_config>
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Message 79140 - Posted: 30 Nov 2015, 10:33:11 UTC - in response to Message 79129.  

You know, that you answered to a over 3.5 years old post of an inactive user?
.
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sgaboinc

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Message 90615 - Posted: 5 Apr 2019, 1:14:23 UTC - in response to Message 73133.  
Last modified: 5 Apr 2019, 1:32:50 UTC

I stopped running Rosetta many months ago when I bought an i7. Problem was that he grabbed all eight CPUs and the fan noise was unacceptable. I did try Tthrottle but that affected all CPUs and my normal work was downgraded significantly.

Is there a way to assign n CPUs to Rosetta where n = Fan Noise OK?

Thanks, Tom


this is a very old post and it seemed the 'demon' has gone away for some time and apparently it 'resurfaced' with vengence
the more recent i'd think 4.x versions of rosetta@home it seemed has been pretty 'optimised'
so if you have a haswell and higher cpu (including the amd ryzens) it probably use AVX etc (it is a good thing :)
and probably gets higher compute throughput

the thing is running 8 concurrent threads with AVX/AVX2 switches on perhaps many more transistors concurrently
so this time round the cpu runs *hot* - it is expected really, troughput probably doubled if all that transistors are switched on for maximum performance and try to imagine concurrent avx/avx2 on the high end intel 16-32 cores or ryzen 16-128 cores cpus
ok above is actually off-topic, the topic is really *fan noise*

what i did *in linux* is to make an attempt to *limit the max cpu frequency* while running all 8 threads concurrently e.g.
cpupower -c all frequency-set -u 3.5ghz

on windows some utility may be necessary to limit the max cpu speeds/frequency, i'm not too sure what may help

i try to find the frequencies (cpu speeds) in which the fan runs fast but just a little slow enough to be somewhat quiet

accordingly i think cpu frequencies and cpu core voltages are somewhat related, if you limit cpu frequencies., i think the on-chip or on-board DVFS (dynamic voltage and frequency scaling) circuits would choose a lower core voltage, as power = V^2 / R plus a linear contribution from F (frequency), a tiny change in V and F could significantly reduce power output and hence requires a lower fan speed to keep TDP, temperatures in control

and oh yes get a better 'cpu cooler' with a bigger fan e.g.. 120-140mm fans, the 'tower heatpipes types' they seem to run more silently

that seem to work for me

off-topic:
i think we've very much entered the age of dark silicon
http://darksilicon.org/
on a 16, 32, 64, 128 core/hyperthreads single chip SOC processor, if you try to push 5 Ghz and AVX2 or AVX512 on all 16, 32, 64, 128 cores /hyperthreads, you would probably need absolute zero (-273 deg C) and superconducting silicon to keep the cpu going lol
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Eshadowt

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Message 90882 - Posted: 30 Jun 2019, 15:23:34 UTC

Random question but couldn’t this be used to create an immortal human, having access to all these new protein configurations?
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Message boards : Number crunching : Beyond newbie Q&A



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