very weak credit

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fzs600

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Joined: 18 Aug 11
Posts: 6
Credit: 2,900,893
RAC: 7,517
Message 2603 - Posted: 16 Dec 2019, 7:29:49 UTC

with ubuntu
AuthenticAMD
AMD FX(tm)-8350 Eight-Core Processor [Family 21 Model 2 Stepping 0]
(8 processors) NVIDIA GeForce GTX 780 Ti (3016MB) driver: 390.11 OpenCL: 1.2 Linux Ubuntu
Ubuntu 18.04.3 LTS [4.15.0-72-generic|libc 2.27 (Ubuntu GLIBC 2.27-3ubuntu1)]


16 Dec 2019, 5:34:52 UTC 16 Dec 2019, 7:04:26 UTC Completed and validated 5,352.89 5,158.54 5.03 Get Decic Fields v3.00 (default)
x86_64-pc-linux-gnu

16 Dec 2019, 5:34:52 UTC 16 Dec 2019, 6:35:47 UTC Completed and validated 3,634.37 3,519.06 3.33 Get Decic Fields v3.00 (default)
x86_64-pc-linux-gnu

15 Dec 2019, 15:00:30 UTC 15 Dec 2019, 17:03:01 UTC Completed and validated 7,330.34 7,175.58 5.36 Get Decic Fields v3.00 (default)
x86_64-pc-linux-gnu


i have 44 wu like that.
is this normal?
thank you.
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Profile Eric Driver
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Message 2604 - Posted: 16 Dec 2019, 15:29:29 UTC - in response to Message 2603.  

That credit does look too low, by about a factor of 10.

I thought maybe your benchmarks were off, so I looked at them. Your GFLOPS look reasonable but the GIOPS (Giga integer operations per second) look very high, which is actually the opposite of what I expected. So I am not sure what is going on here, and will need to think on it some more.

This could be a side effect of "Credit New". I noticed that this machine has a high total credit but low RAC, meaning it's been away for a while. While you were away the credit system was changed to Credit New, so maybe that is contributing to the problem. I would try recomputing benchmarks from the client and resetting stats.
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fzs600

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Message 2605 - Posted: 16 Dec 2019, 17:39:29 UTC - in response to Message 2604.  

That credit does look too low, by about a factor of 10.

I thought maybe your benchmarks were off, so I looked at them. Your GFLOPS look reasonable but the GIOPS (Giga integer operations per second) look very high, which is actually the opposite of what I expected. So I am not sure what is going on here, and will need to think on it some more.

This could be a side effect of "Credit New". I noticed that this machine has a high total credit but low RAC, meaning it's been away for a while. While you were away the credit system was changed to Credit New, so maybe that is contributing to the problem. I would try recomputing benchmarks from the client and resetting stats.

very well I await a solution
thank you
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Profile Eric Driver
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Message 2606 - Posted: 16 Dec 2019, 21:07:24 UTC - in response to Message 2605.  

That credit does look too low, by about a factor of 10.

I thought maybe your benchmarks were off, so I looked at them. Your GFLOPS look reasonable but the GIOPS (Giga integer operations per second) look very high, which is actually the opposite of what I expected. So I am not sure what is going on here, and will need to think on it some more.

This could be a side effect of "Credit New". I noticed that this machine has a high total credit but low RAC, meaning it's been away for a while. While you were away the credit system was changed to Credit New, so maybe that is contributing to the problem. I would try recomputing benchmarks from the client and resetting stats.

very well I await a solution
thank you


I noticed your credit per hour is slowly going up. So I have a guess as to what is happening. Normally we see the opposite effect when a user first connects - credit starts high and slowly comes down - this is because the fpops estimate is higher than it should be and this is the initial guess that Credit New uses. In your case, Credit New is starting from older stats from many months ago when run times were much quicker. So basically, in your case, Credit New is starting from an under-estimate, hence you get less credit. It will just take some time for Credit New to stabilize.

If you don't want to wait for the credit to stabilize, you should reset your stats. I know it can be done, but I forget offhand how to do it. One way is to reset the project but this will also abort any currently running tasks, so be careful with that method. Hopefully someone else can chime in with a better method (Richard, are you still lurking around out there?).
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fzs600

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Message 2607 - Posted: 17 Dec 2019, 10:28:49 UTC - in response to Message 2606.  

good
I start crunch again with this PC and over time the situation will recover?
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Profile Eric Driver
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Message 2608 - Posted: 17 Dec 2019, 17:26:03 UTC - in response to Message 2607.  

good
I start crunch again with this PC and over time the situation will recover?


Yes, but it could take a while.

An instant fix would be to reset the project (If my hypothesis is true).
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fzs600

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Message 2609 - Posted: 18 Dec 2019, 10:57:45 UTC - in response to Message 2608.  

well I put 2 PC under ubuntu for 1 week.
and I hope for rapid stabilization.
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Profile Conan
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Message 2754 - Posted: 10 May 2020, 11:03:56 UTC

This credit issue still has not changed, I have recently come back and I am only getting 6 cr/h or less. 12 credits for more than 2 hours work is very much on the poor side.

I ran a few and then aborted the rest as it was not worth the effort, credit wise.

Sorry but I haven't stayed very long this time round, but I am just not seeing much of a reward to run the project.

Conan
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Profile Eric Driver
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Message 2757 - Posted: 10 May 2020, 18:20:22 UTC - in response to Message 2754.  

This credit issue still has not changed, I have recently come back and I am only getting 6 cr/h or less. 12 credits for more than 2 hours work is very much on the poor side.

I ran a few and then aborted the rest as it was not worth the effort, credit wise.

Sorry but I haven't stayed very long this time round, but I am just not seeing much of a reward to run the project.

Conan


I have been meaning to take care of the credit issue. I will do that as soon as the Pentathlon is over.

I am considering using the credit per wu option, instead of creditNew. Does anyone know what a good credit/hour is on a single threaded CPU core (at 3.5 to 4 GHz)?
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Richard Haselgrove

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Message 2759 - Posted: 10 May 2020, 21:50:19 UTC - in response to Message 2757.  

I am considering using the credit per wu option, instead of creditNew. Does anyone know what a good credit/hour is on a single threaded CPU core (at 3.5 to 4 GHz)?
Let's be careful to research this properly - some people have, in the past, provided what must have been deliberate over-generous examples.

I would personally nominate Einstein@Home as a well resourced, long-standing, thoughtful project that uses fixed credit and makes a conscientious effort to honour the cobblestone definition. I'll try to find some figures tomorrow.
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Profile Eric Driver
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Message 2760 - Posted: 10 May 2020, 22:02:42 UTC - in response to Message 2759.  

I am considering using the credit per wu option, instead of creditNew. Does anyone know what a good credit/hour is on a single threaded CPU core (at 3.5 to 4 GHz)?
Let's be careful to research this properly - some people have, in the past, provided what must have been deliberate over-generous examples.

I would personally nominate Einstein@Home as a well resourced, long-standing, thoughtful project that uses fixed credit and makes a conscientious effort to honour the cobblestone definition. I'll try to find some figures tomorrow.


No worries, it's at least 2 weeks away.

And I've gotten better at reducing variance in run times. So I could base credit on the average run time (I run 100 cases offline for every batch to get a good estimate of the average).
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Profile Skivelitis2

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Message 2764 - Posted: 11 May 2020, 15:59:01 UTC

Look to the PrimeGrid sieve sub-projects for a fair benchmark, both CPU and GPU.
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Profile Eric Driver
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Message 2775 - Posted: 22 May 2020, 23:00:19 UTC - in response to Message 2759.  

I am considering using the credit per wu option, instead of creditNew. Does anyone know what a good credit/hour is on a single threaded CPU core (at 3.5 to 4 GHz)?
Let's be careful to research this properly - some people have, in the past, provided what must have been deliberate over-generous examples.

I would personally nominate Einstein@Home as a well resourced, long-standing, thoughtful project that uses fixed credit and makes a conscientious effort to honour the cobblestone definition. I'll try to find some figures tomorrow.


I can use the credit that CreditNew computes to give me a good idea what I should use for fixed credit. On my one machine the credit fluctuates between 45 and 50 credits/hour. I will use the higher end of the range for the fixed credit. We can see how that works for now and then adjust accordingly.
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