Prime 95 will not let me change cores per worker

evanh · 2017-12-22, 18:24

Prime 95 Specs:
Mac OS X 64-bit, Prime95,v29.4, build 6

Computer Specs:
4 GHz Intel Core i7, 32 GB 1600 MHz DDR3, AMD Radeon R9 M295X 4 GB
Activity Monitor has regular CPU usage between 390%-400% for Prime95 with 8 threads

Prime Settings:
configured usage for day and night=26000 MB configured in the application
CPU/Work Threads 1,2,3,4 = LL-100M-LL test 100+ million digitsconfigured in browser
Priority Level = 10. configured in the application

When I attempt to change the worker windows from 1 worker to 2 workers, then the worker 1 cores from 3cores to 1core it automatically returns it back to 4 cores for worker window 1 and doesn't allow me to allocate my cores at my own discretion.

I am currently testing M332196607
[Comm thread Dec 22 12:06] Sending expected completion date for M332196607: May 18 2018
[Dec 22 12:14] Iteration: 11420000 / 332196607 [3.43%], ms/iter: 36.960

Should I just let it continue to run on 4 cores?

The whole purpose for wanting to open another worker window was have one window performing factoring calculations. It is my understanding that when Prime95 is performing factoring computations it can take advantage of the RAM. Since I have a large amount of RAM I was going to help out with some factoring.

I wanted to leave 3 cores on the current LL test and use one as a factoring core.

This iMac, without Prime95, is essentially a desk ornament so I just want to put it to work!

evanh · 2017-12-22, 19:10

attached is the benchmarks for my Mac

ixfd64 · 2017-12-22, 20:02

I believe this is a known issue. However, you can change the worker settings by manually editing the local.txt file.

Prime95 · 2017-12-22, 21:30

This is a known issue. Prime95 won't let you use less than 4 cores on a big assignment because it is highly likely that a user will give up before completing multiple concurrent 100M digit assignments. As ixfd64 points out, this can be overridden with manual editing.

As to P-1 factoring with your gobs of memory, I wouldn't worry about it. P-1 factoring is currently well ahead of LL testers.

Also, your best set up is one worker running 4 threads. Leave priority at 1 or 2, you will achieve the same throughput without slowing down your day-to-day activities.

evanh · 2017-12-22, 22:25

Thank you both for the quick responses.

I will just leave it as one worker with 4 cores, and I will go ahead and reduce the priority to 2.

Also, I had initially tried to install the latest version of P95 on my Mac and it would not place a certain file in the correct location. I ended up installing an older version of Prime 95 then downloading the new version and this allowed the latest version to start up and run just fine. Just wanted to let whoever know. I initially emailed support about the issue which I believe was Mr. Woltman and he advised me to place the file into a certain place but that did not work on my machine so I defaulted to the older version and thought, well let me try to install the new version on top of the old and it worked.

Thanks for the input.

2017-12-22, 18:24	#1
evanh "Evan" Dec 2017 Houston, TX 2×3×5 Posts	Prime 95 will not let me change cores per worker Prime 95 Specs: Mac OS X 64-bit, Prime95,v29.4, build 6 Computer Specs: 4 GHz Intel Core i7, 32 GB 1600 MHz DDR3, AMD Radeon R9 M295X 4 GB Activity Monitor has regular CPU usage between 390%-400% for Prime95 with 8 threads Prime Settings: configured usage for day and night=26000 MB configured in the application CPU/Work Threads 1,2,3,4 = LL-100M-LL test 100+ million digitsconfigured in browser Priority Level = 10. configured in the application When I attempt to change the worker windows from 1 worker to 2 workers, then the worker 1 cores from 3cores to 1core it automatically returns it back to 4 cores for worker window 1 and doesn't allow me to allocate my cores at my own discretion. I am currently testing M332196607 [Comm thread Dec 22 12:06] Sending expected completion date for M332196607: May 18 2018 [Dec 22 12:14] Iteration: 11420000 / 332196607 [3.43%], ms/iter: 36.960 Should I just let it continue to run on 4 cores? The whole purpose for wanting to open another worker window was have one window performing factoring calculations. It is my understanding that when Prime95 is performing factoring computations it can take advantage of the RAM. Since I have a large amount of RAM I was going to help out with some factoring. I wanted to leave 3 cores on the current LL test and use one as a factoring core. This iMac, without Prime95, is essentially a desk ornament so I just want to put it to work!

2017-12-22, 19:10	#2
evanh "Evan" Dec 2017 Houston, TX 2·3·5 Posts	attached is the benchmarks for my Mac Attached Thumbnails

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2017-12-22, 20:02	#3
ixfd64 Bemusing Prompter "Danny" Dec 2002 California 4533₈ Posts	I believe this is a known issue. However, you can change the worker settings by manually editing the local.txt file.

2017-12-22, 21:30	#4
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 1110101101110₂ Posts	This is a known issue. Prime95 won't let you use less than 4 cores on a big assignment because it is highly likely that a user will give up before completing multiple concurrent 100M digit assignments. As ixfd64 points out, this can be overridden with manual editing. As to P-1 factoring with your gobs of memory, I wouldn't worry about it. P-1 factoring is currently well ahead of LL testers. Also, your best set up is one worker running 4 threads. Leave priority at 1 or 2, you will achieve the same throughput without slowing down your day-to-day activities.

2017-12-22, 22:25	#5
evanh "Evan" Dec 2017 Houston, TX 30₁₀ Posts	Thank you both for the quick responses. I will just leave it as one worker with 4 cores, and I will go ahead and reduce the priority to 2. Also, I had initially tried to install the latest version of P95 on my Mac and it would not place a certain file in the correct location. I ended up installing an older version of Prime 95 then downloading the new version and this allowed the latest version to start up and run just fine. Just wanted to let whoever know. I initially emailed support about the issue which I believe was Mr. Woltman and he advised me to place the file into a certain place but that did not work on my machine so I defaulted to the older version and thought, well let me try to install the new version on top of the old and it worked. Thanks for the input.