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Profile mikey
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Message 75926 - Posted: 23 Jun 2023, 23:08:56 UTC - in response to Message 75921.  

Yes I know, I have some new ram to put into a pc because it's got a combination of ram speeds in it now and the new stuff is faster than the slowest stuff but not as fast as the fastest stuff, and yes I know about them all running at the slowest speed that's why I bought the new stuff. I will spread the old ram out between my other pc's trying to keep speed in mind.


That's what I was trying to do, along with the problem of two RAM types - some go fast due to Intel XMP (something to do with raising the voltage for more speed), some are just fast and don't do XMP. But if you get a 3200MHz XMP and a 3200MHz normal and mix them, they don't go 3200MHz. The MB switches off XMP because one of them can't do it, and the XMP one can't go full speed without XMP, so they now both go about 2600MHz. Anyway my strategy didn't work to swap RAM about, because I'm limited to which computers like which RAM! My best machine crashes with the new RAM, yet it works fine on another, so my best machine now has slower RAM in it, but everything has lots of RAM which is the main thing for Boinc.


I agree it's a pain in the butt
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Mr P Hucker
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Message 75929 - Posted: 23 Jun 2023, 23:37:15 UTC - in response to Message 75926.  

I agree it's a pain in the butt
Only if you leave the RAM on the chair and sit on it. Metal oxide semiconductor field effect transistor pins are much more painful though.
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 75937 - Posted: 24 Jun 2023, 10:43:05 UTC - in response to Message 75929.  

I agree it's a pain in the butt


Only if you leave the RAM on the chair and sit on it. Metal oxide semiconductor field effect transistor pins are much more painful though.


LOL
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Message 76112 - Posted: 1 Jul 2023, 19:39:25 UTC - in response to Message 75485.  

Lately, N-Body Simulation tasks com through using 9 CPUs on my computer.

Will all future N-Body simulation tasks be using 9 CPUs?

S. Gaber
Oldsmar, FL
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Message 76113 - Posted: 1 Jul 2023, 19:46:50 UTC - in response to Message 76112.  

They will try to use all cores that are available.
There should be app_config to change this behavior on page 2.
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Message 76115 - Posted: 1 Jul 2023, 20:02:48 UTC - in response to Message 76113.  

They will try to use all cores that are available.
With a limit of 16, which is annoying when you have 24. I had to change them to 12 to run 2.
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 76169 - Posted: 5 Jul 2023, 18:40:19 UTC - in response to Message 75485.  

I just recently "upped" the utilization of my new computer's CPU. I have a 5995 Threadripper Pro with 64 core CPUs. Until today, I had run at a 50% CPU utilization. Currently I am running ~ 65-75% core utilization. I am nervously increasing the amount of CPU utilization. When I first downloaded BOINC to this new computer I ran it at almost 100% utilization and could barely get in to stop the program as it took over the computer.

My question is this: How much CPU % utilization can I run without the BOINC program blocking me out and wreaking havoc?

PS I was a longtime SETI & milky way BOINC utilizer, moving from 4 core to 7 cores.

Thanks for any guidance.
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Message 76172 - Posted: 5 Jul 2023, 21:25:39 UTC - in response to Message 76169.  
Last modified: 5 Jul 2023, 21:26:15 UTC

Depends on the project you're running and what OS you have and what else you're doing on the computer. I've got my 24 thread Ryzen 9 3900XT on 100% in Windows 11, it's also my main computer for browsing, email, and also has two security cameras on it which try to take 1 thread each. It's happy like that unless I run LHC, which uses Virtualbox and grinds things to a halt. I can still get in to pause Boinc, so it's not deadly, but I need to lower the usage for that project. I did this by telling it each task needed more than 1 thread in the app config file.

You should just adjust it gradually until it annoys you, then back off a bit.
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 76173 - Posted: 6 Jul 2023, 4:03:25 UTC - in response to Message 76169.  

I just recently "upped" the utilization of my new computer's CPU. I have a 5995 Threadripper Pro with 64 core CPUs. Until today, I had run at a 50% CPU utilization. Currently I am running ~ 65-75% core utilization. I am nervously increasing the amount of CPU utilization. When I first downloaded BOINC to this new computer I ran it at almost 100% utilization and could barely get in to stop the program as it took over the computer.

My question is this: How much CPU % utilization can I run without the BOINC program blocking me out and wreaking havoc?

PS I was a longtime SETI & milky way BOINC utilizer, moving from 4 core to 7 cores.

Thanks for any guidance.


One other thing to look out for is the amount of memory each task uses as compared to the total amount of ram you have You can check that by going into the Boinc Manager and clicking properties on a running task, some types of tasks use alot more memory than others do, ie the EcmP2 tasks at Yoyo use about 8gb of ram for each task but the regular Ecm tasks use less than 250mb each.
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Message 76176 - Posted: 6 Jul 2023, 4:49:43 UTC - in response to Message 76173.  

One other thing to look out for is the amount of memory each task uses as compared to the total amount of ram you have You can check that by going into the Boinc Manager and clicking properties on a running task, some types of tasks use a lot more memory than others do, ie the EcmP2 tasks at Yoyo use about 8gb of ram for each task but the regular Ecm tasks use less than 250mb each.
And Boinc is pretty rubbish (as always) at working out how much RAM to use. You may have to reduce it from 100% to something less.
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 76178 - Posted: 6 Jul 2023, 8:30:44 UTC - in response to Message 75546.  

I think https://foldingathome.org/ uses double precision.


several projects "use" DP, like Einstein and Asteroids. but it's not a large portion of the total computation time like Milkyway Separation is/was. so even though a P100 has decent FP64 performance, it's relatively low FP32 performance makes it fall behind in these hybrid FP32/FP64 situations. far more worth it to go with a card with better FP32 since that's where most of the time is spent.


Folding@home uses single precision

https://fahbench.github.io/details.html
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Message 76180 - Posted: 6 Jul 2023, 14:43:57 UTC - in response to Message 76178.  

Folding@home uses single precision

https://fahbench.github.io/details.html
This part is interesting: "Consumer GPUs are really bad at double precision calculations (so manufacturers can sell more expensive enterprise units to researchers)."

Only one Boinc project has ever needed/used DP, Milkyway. Why? There are quite a lot of us with DP cards, the older cards like 280X, the posh ones like Radeon VII.
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 76183 - Posted: 6 Jul 2023, 15:03:37 UTC - in response to Message 76180.  

Folding@home uses single precision

https://fahbench.github.io/details.html
This part is interesting: "Consumer GPUs are really bad at double precision calculations (so manufacturers can sell more expensive enterprise units to researchers)."

Only one Boinc project has ever needed/used DP, Milkyway. Why? There are quite a lot of us with DP cards, the older cards like 280X, the posh ones like Radeon VII.


or Titan V which is better than all of those.

but Einstein uses DP also. and it is needed for the calculations, but it's only a small part of the overall computation (not 100% like MW) and they just coded the app in a way to revert that calculation to the CPU if the GPU doesn't support it.

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Message 76185 - Posted: 6 Jul 2023, 15:12:58 UTC - in response to Message 76183.  
Last modified: 6 Jul 2023, 15:13:11 UTC

or Titan V which is better than all of those.

but Einstein uses DP also. and it is needed for the calculations, but it's only a small part of the overall computation (not 100% like MW) and they just coded the app in a way to revert that calculation to the CPU if the GPU doesn't support it.
What I meant was if they're making fast expensive DP cards for researchers, there must be a lot of programs they're using which utilise it fully like MW, or they'd just buy gaming cards. Why aren't we seeing fully DP apps in Boinc? MW did well with them.
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 76187 - Posted: 6 Jul 2023, 15:24:20 UTC - in response to Message 76185.  

Because they don’t need the extra precision. And implementing it would ostracize a large portion of their user base, reduce a very large chunk of their overall processing power, and gain nothing in the quality of their science results.

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Message 76190 - Posted: 6 Jul 2023, 15:39:16 UTC - in response to Message 76187.  

Because they don’t need the extra precision. And implementing it would ostracize a large portion of their user base, reduce a very large chunk of their overall processing power, and gain nothing in the quality of their science results.
So what are researchers running on the pro cards and why isn't that sort of work done in Boinc?
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 76191 - Posted: 6 Jul 2023, 16:37:18 UTC - in response to Message 76190.  

Because they don’t need the extra precision. And implementing it would ostracize a large portion of their user base, reduce a very large chunk of their overall processing power, and gain nothing in the quality of their science results.
So what are researchers running on the pro cards and why isn't that sort of work done in Boinc?


Ask them.

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Message 76194 - Posted: 7 Jul 2023, 0:22:18 UTC - in response to Message 76191.  

Because they don’t need the extra precision. And implementing it would ostracize a large portion of their user base, reduce a very large chunk of their overall processing power, and gain nothing in the quality of their science results.
So what are researchers running on the pro cards and why isn't that sort of work done in Boinc?
Ask them.
I don't know them, and they'll be too busy doing their research.
The above was double spaced between sentences, I apologise for the forum software ruining my post.
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Message 76195 - Posted: 7 Jul 2023, 0:24:26 UTC - in response to Message 76194.  

then i guess you'll never know.

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Message 76196 - Posted: 7 Jul 2023, 0:33:18 UTC

I just recently "upped" the utilization of my new computer's CPU. I have a 5995 Threadripper Pro with 64 core CPUs. Until today, I had run at a 50% CPU utilization. Currently I am running ~ 65-75% core utilization. I am nervously increasing the amount of CPU utilization. When I first downloaded BOINC to this new computer I ran it at almost 100% utilization and could barely get in to stop the program as it took over the computer.

My question is this: How much CPU % utilization can I run without the BOINC program blocking me out and wreaking havoc?

PS I was a longtime SETI & milky way BOINC utilizer, moving from 4 core to 7 cores.

Thanks for any guidance.


It sounds like you don't have enough RAM in the system to use it fully for that project. Add more RAM and watch RAM utilization.

A good rule to follow is having 1GB of RAM per thread. So you'll want at least 128GB of RAM for that 5995 TR Pro CPU.

Just keep in mind, 1GB is a good rule of thumb, but not the end all. Some projects can and will use more than 1GB per task. 1GB is the bare minimum. I've recently been going with 2GB or 4GB per thread on my hosts due to the increase in memory foot prints at some projects that I run.
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