Posts by Gigacruncher [TSBTs Pirate]
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1) Message boards : Cafe : How to run SRBase using GPU (Message 6916)
Posted 6 Nov 2020 by Gigacruncher [TSBTs Pirate]
I spoke too soon -- in Windows Task Manager, it appears that Prime95 never exceeds ~48% CPU usage if BOINC is running. I get how due to the vagaries of Windows, giving Prime95 a priority of 10 doesn't result in it getting any more cycles, but none of the available settings in Prime95 or BOINC seem to alter the fact that Prime95 won't utilize more than half of available processor time if BOINC is running. I tried giving BOINC just 1 thread and 1% of available CPU time and I tried giving it all 8 threads and 100% of CPU time; processor utilization varies, but rarely approaches the over 90% it does running Prime95 alone. HWInfo shows my GPU utilization at 100% (though Task Manager seems to think the GPU is idle). I'm still looking for a means of getting SRBase to use my GPU without (significantly) interfering with Prime95.


Hi there. Prime95 will always force you to not run all threads on your cores for better performance even when you set it on local.txt file. It is not recommended to use HT for PRP/LLR, only for factoring on CPU.
2) Message boards : Number crunching : Distribution of Credits (Message 6812)
Posted 18 Oct 2020 by Gigacruncher [TSBTs Pirate]
Before jumping to the 72-73 bits range here’s an interesting sub project;

-for range lower than 99M clean all up to 73 bits, I believe this can be done in one week.
https://www.mersenne.ca/status/tf/0/0/2/0


yes, but this is reserved by the GPU72 project? I will ask the admin if these are available but will be working on later in the future.


Please ask him. In that range you have a mix of fast and slow wus but most it will please the community in trying to find known factors for that range almost PRP’ed.
3) Message boards : Number crunching : Distribution of Credits (Message 6810)
Posted 18 Oct 2020 by Gigacruncher [TSBTs Pirate]
Before jumping to the 72-73 bits range here’s an interesting sub project;

-for range lower than 99M clean all up to 73 bits, I believe this can be done in one week.
https://www.mersenne.ca/status/tf/0/0/2/0
4) Message boards : Number crunching : Trial Factoring (Message 6578)
Posted 9 Jun 2020 by Gigacruncher [TSBTs Pirate]
The last batch with around 122k WUs are running now (795M max), no more work left in the 70-71 range. There could be some tests left. I will check this later. The next 71-72 range is planned later today.


Quick question, for 71 to 72 bits, are we going from lowest n range to highest n range or the other way around?
5) Message boards : News : New work for TF added (Message 6570)
Posted 7 Jun 2020 by Gigacruncher [TSBTs Pirate]
For the slower GPUs you can almost track on your completed wus which ones have a factor, but this is a manual search. If the factor is found in the beginning of the bit depth then you can easily see by lower timings but if it is found at the end the search is more complicated. Since my wus are ran each 700 seconds or so, any timings below 500-600 seconds have indeed a factor. Faster machines are tricky...
6) Message boards : Number crunching : Trial Factoring (Message 6543)
Posted 31 May 2020 by Gigacruncher [TSBTs Pirate]
You can trick the server by saying you have x amount of GPU’s or CPU’s. You are too naive. If we had 2700 GPU how many wus would we all be doing per day? Make the calculations.


And exactly what is the purpose of doing so? Why not just accept the amount that the server send out?

Doing the last request would actually make it possible to calculate the real ressources we have - now in stead of a very huge production we only have a very huge cue of work waiting to be processed.

Maybe a setting on the server could/should be made to render that possibility IMPOSSIBLE - is that possible Reb?

A note on my third question is that the server has proven reliable enough to sustain the users with enough work even if they have only 20 workunits cued per host.


I advice you to read this https://boinc.berkeley.edu/wiki/Client_configuration and stop where you are.
7) Message boards : Number crunching : Trial Factoring (Message 6540)
Posted 31 May 2020 by Gigacruncher [TSBTs Pirate]
You are wrong, please think. Your top host does not have 400 GPU’s.
Your output it is not about how much you can queue but how much you can process. Dividing by 20 is wrong.


On Free-dc stats there are 117 active users of 290 = 117 GPUs


Another ressource is the server status, so you can see active users reported a result, last time I have seen 111.


The question was if the project had 2700 or 2800 GPUs deployed which now I believe we reached a consensus.
Look at this: 2800 GPU’s / 117 active users =~24....lol Active crunchers here don’t have on average 24 GPU’s...lol
8) Message boards : Number crunching : Trial Factoring (Message 6537)
Posted 31 May 2020 by Gigacruncher [TSBTs Pirate]
You are wrong, please think. Your top host does not have 400 GPU’s.
Your output it is not about how much you can queue but how much you can process. Dividing by 20 is wrong.


On Free-dc stats there are 117 active users of 290 = 117 GPUs


So it is not 2700 GPUs...Lol
9) Message boards : Number crunching : Trial Factoring (Message 6535)
Posted 31 May 2020 by Gigacruncher [TSBTs Pirate]
You are wrong, please think. Your top host does not have 400 GPU’s.
Your output it is not about how much you can queue but how much you can process. Dividing by 20 is wrong.
10) Message boards : Number crunching : Trial Factoring (Message 6534)
Posted 31 May 2020 by Gigacruncher [TSBTs Pirate]
Also you are 7 day averaging 103,000 GHz/day on GIMPS, that’s equivalent to 70 RTX 2070.
11) Message boards : Number crunching : Trial Factoring (Message 6532)
Posted 31 May 2020 by Gigacruncher [TSBTs Pirate]
Not 2700 GPUs but around 100-200 yes...lol


2700 should be correct, there are only 20 WUs max in progress per host.


You can trick the server by saying you have x amount of GPU’s or CPU’s. You are too naive. If we had 2700 GPU how many wus would we all be doing per day? Make the calculations.
12) Message boards : Number crunching : Trial Factoring (Message 6530)
Posted 31 May 2020 by Gigacruncher [TSBTs Pirate]
Not 2700 GPUs but around 100-200 yes...lol
13) Message boards : Number crunching : Trial Factoring (Message 6516)
Posted 28 May 2020 by Gigacruncher [TSBTs Pirate]
In my opinion we should test for the lower n range from 72 bits to 73 bits to get a feeling of the timings needed, we have almost 470k units in there. This will help in short term GIMPS project but I do understand we should get fast wus available to the community, like the ones we are doing now, which will only be useful to GIMPS in 20-30 years time. It’s a threshold.

Extrapolating my timings I would get 40-45 mins per wu at n<=199M from 72 bits to 73bits.

Since I can run the standalone client as expected it is not feasible to run these bigger wus on slow slow GPU’s so whatever we decide I’m perfectly fine with it.

PS( my card is AMD AMD Radeon HD 7670)
14) Message boards : Number crunching : Trial Factoring (Message 6514)
Posted 28 May 2020 by Gigacruncher [TSBTs Pirate]
Here's an example on my GPU.

For n=794M it takes 10 mins from 70 bits to 71 bits
For n=794M it takes 20 mins from 71 bits to 72 bits
For n=794M it takes 30 mins from 70 bits to 72 bits

A NVIDIA card RTX 2080 is 50x faster than my laptop GPU.
15) Message boards : Number crunching : Trial Factoring (Message 6513)
Posted 28 May 2020 by Gigacruncher [TSBTs Pirate]
Can you queue more than 500k wus onto the server or the limitation is on GIMPS side to provide a bigger batch of wus? Just conscience that we will reach a time we will start processing more than 200-300k wus per day, which would be awesome, and therefore time demanding from your side to keep feeding the server on a daily basis. Really looking forward to seeing for 70-71 bits all done the 4M wus.


yes, its planned but it will growing the database very fast, Iam trying to purge things before I backup the database. The main issue is the assignment queue. The more I have in pipeline the more its taking to report results.


Maybe for higher ranges instead of going to 71 bits from 70 just go straight to 72 or 73 instead. You will have to make some trials for timings.
16) Message boards : Number crunching : Trial Factoring (Message 6511)
Posted 28 May 2020 by Gigacruncher [TSBTs Pirate]
Can you queue more than 500k wus onto the server or the limitation is on GIMPS side to provide a bigger batch of wus? Just conscience that we will reach a time we will start processing more than 200-300k wus per day, which would be awesome, and therefore time demanding from your side to keep feeding the server on a daily basis. Really looking forward to seeing for 70-71 bits all done the 4M wus.
17) Message boards : Number crunching : Trial Factoring (Message 6501)
Posted 25 May 2020 by Gigacruncher [TSBTs Pirate]
For better understanding the next batch will have a better name with current range max. The current batch reached 438M of 1000M max.


Nope, for n range taking from 70 to 71 bits the available range is only up to 799M. I believe the range 1000M to 1099M is only available to CPU at the moment, high exponent low bit.
18) Message boards : Number crunching : Trial Factoring (Message 6493)
Posted 23 May 2020 by Gigacruncher [TSBTs Pirate]
I believe the yellow cells is where another action is being made, the P-1 Factoring. See here for all Math approaches: https://www.mersenne.org/various/math.php

If you zoom in onto those yellow cells up to maximum resolution you will see along side trial factoring the n has taken P-1 factoring to two bounds.

Also, as already said here, fixed column and going down, wu speed will increase. Fixed line, going column to right wu speed will decrease.
19) Message boards : Number crunching : Trial Factoring (Message 6489)
Posted 23 May 2020 by Gigacruncher [TSBTs Pirate]
What about adding more details on SRBase progress on GIMPS trial factoring?

Looking at these stats as a matrix (line, column) where line is the range and column the bit depth: https://www.mersenne.ca/status/tf/0/0/1/10000

Priority to clean all ranges to 71 bits, on the above link is the 70 bits column.
Right now SRBase is cleaning the position (300M,70 bits) and will go down up to (700M,70bits). Already in the server queue some (400M,70 bits) work. As can be seen 5.1M wus to clean to 71 bits for n range up to 999M.

On a daily basis it is fantastic to see projects progress. Keep an eye on the 70 column and you will see the figures changing, or moving to the right column, or getting out, when a factor is found.
20) Message boards : Number crunching : Trial Factoring (Message 6477)
Posted 22 May 2020 by Gigacruncher [TSBTs Pirate]
Hey Reb. Are you going to feed the TF with more work or you just awaiting the return of last results? TIA.


No, already posted in the work available thread. There is a problem to request new work running into an error. The admin was already informed.


Oh, not again...


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