1)
Message boards :
Number crunching :
Badges III
(Message 160548)
Posted 107 days ago by  ThrasherX-17
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2)
Message boards :
Number crunching :
A Prime Chinese New Year Challenge
(Message 159510)
Posted 130 days ago by ThrasherX-17
All of your CPUs have a ton of cache and are fast enough for the challenge, so 1 thread/task is what you'll want to use. Make sure you have settings in BOINC to use at most 50% of your CPUs as the extra logical cores provided by HT/SMT are no good for LLR.
Thank you for your answer.
If I get it right, the GPUs will get GFN-17 tasks but what about CPU tasks?
Is it better to check GFN-17 or PPS-MEGA for CPUs for max output during the challenge?
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3)
Message boards :
Number crunching :
A Prime Chinese New Year Challenge
(Message 159508)
Posted 130 days ago by ThrasherX-17
More...confusing. It really comes down to the individual CPU's cache structure. For CPUs with less than 2MB L3/core (or L2+L3 for newer Ryzen/Intel), multithreading (2 threads/task) is the way to go, and the rest can just run a single thread.
We can certainly agree that it's time to give the opening spiel a good update. The AVX-512 section now needs to add Ryzen 7000/Epic Genoa. Great little performers despite needing 2 clocks per instruction.
Interesting.
I have Ryzen 5900X and 3900X and a couple of Xeons 26xx v2 and 26xx v3
In your opinion is it better to run multithreading tasks? HT is on everywhere if it matters.
Thank you!
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4)
Message boards :
Number crunching :
Prime Meridian Day Challenge
(Message 157761)
Posted 203 days ago by ThrasherX-17
Big thanks for all of your answers!
Computing times improved after updating BIOS (from 5% per 1 hour to 10% per 1 hour) 12 cores per WU and "use 50% of cores".
It seems to me it's not optimal performance of 3900X but a lot better that earlier.
10 hours for 1 Cullen LLR task
Also I've installed chipset drivers and Ryzen Master but didn't change anything there.
My running apps: boinc manager and teamviewer (0-0,5% of CPU usage)
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5)
Message boards :
Number crunching :
Prime Meridian Day Challenge
(Message 157734)
Posted 205 days ago by ThrasherX-17
Thanks to everybody with the answers on my questions above.
Some things are too complicated and above my knowledge because I'm a doctor and anesthesiology is my field.
I sorted all of my PCs into 9 groups according to the number of cores and also GPU tasks and now when I set in boinc to use 50% of cores the computation times are a lot better.
The only problem that left is my Ryzen 9 3900X.
I bought it yesterday and this PC joined the challenge too.
I used the same settings as on 5900X build (12 cores per task) with use of 50% CPU cores but the computation times are awful.
Cullen task on 5900X - 6 hours 30 min
On 3900X - 14 hours and still 75% the cores temps are about 62-63 but when I start any different benchmark (Cinebench, passmark) the temps are near 85-86 degrees.
Memory is DDR4 2x16Gb @3200, XMP activated.
I tried to set 6 cores per task and the situation was even worse. 1,1% - 1 hour
Any ideas?
A little update:
I tried 2 workunits with (6 core per task) instead of 1 WU with 12 cores settings but when I suspended 1 task my computation times went from 1,1% - 1 hour to 5,8% - 1 hour.
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6)
Message boards :
Number crunching :
Prime Meridian Day Challenge
(Message 157631)
Posted 211 days ago by ThrasherX-17
Thanks for your reply!!
Ok, in case if I set to use 50% of CPU cores.
Does it make sense to change to "6 cores per tasks" settings in PCs with 12/24 threads configuration or is better to stay with "12 cores per task"???
Is it normal that after changing to use 50% of CPU cores my Windows task manager shows only 60% of CPU usage not 100%??
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7)
Message boards :
Number crunching :
Prime Meridian Day Challenge
(Message 157629)
Posted 211 days ago by ThrasherX-17
Hello!
It seems I have a big problem with optimum settings.
I divided all my PCs at 5 different settings according to the quantity of CPU threads.
But the times are 24+ hours almost everywhere.
For example:
2 x Xeon 2470 (8c/16t)@2.6 are running Cullen with 16 threads per task. It took 23 hours to reach 94% of tasks. No AVX
2 x Xeon 2698v3 (16t/32c)@2.9 with 16 threads per task (AVX 2.0). 22 hours to reach 90%.
Ryzen 5900X (12c/24t)@4.2 with 12 threads per task 14 hours to reach 90%/
Everywhere HT is ON. CPU is fully loaded and my BOINC settings are set to use 100% of CPU cores and 100% of CPU time.
Is it normal? How can I improve my CPU output?
Thanks! And sorry for my bad English.
P.S. I've read about to set CPU cores to 50% in case when HT is ON. But when I set to use 50% of CPU cores my CPU load drops. What is the priority.
Set settings of CPU 50% and then download tasks or download tasks and set CPU to 50%
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8)
Message boards :
Problems and Help :
Radeon HD7950 low GPU utilization (PPS Sieve 1.42 opeclatiPPSsieve)
(Message 156816)
Posted 278 days ago by ThrasherX-17
Are you using the Windows Task Manager to get those numbers because if so it's notoriously bad at tracking stuff like that, you will get much more accurate numbers from GPU-Z or even MSIAfterburner. MSIAfterburner let's you adjust things to keep from overheating or you can even adjust them to make them run a bit faster, the adjustments work for most but not all gpus but seeing how your gpu is really doing does work for every gpu I've ever tried and I do have one like you do.
Hello!
Thank you for the answer.
I use MSI afterburner for monitoring GPU usage and GPU temps.
MSI Afterburner shows GPU usage somewhere from 60 to 65% and it looks like real.
For example, my Radeon HD 7950 OC @ Primegrid with 60-65% usage with temps around 60 degrees. @Einstein (2 WUs per core) and 96-99% usage with temps around 75-80 degrees.
This facts prove accurate GPU monitoring by MSI Afterburner. And I still can't increase GPU usage at Primegrid app.
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9)
Message boards :
Problems and Help :
Radeon HD7950 low GPU utilization (PPS Sieve 1.42 opeclatiPPSsieve)
(Message 156636)
Posted 304 days ago by ThrasherX-17
Hello everybody!
Happy to be back to the Primegrid family.
I stuck at the problem of low GPU utilization with my Radeon GPU.
I run 1 WU - 1 GPU and I've got only 62-65% of GPU core usage.
My system is Win 7 64 bit
CPU i7-2600k and 8 Gb of RAM
Please, help me to improve the GPU utilization (if it's possible)
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10)
Message boards :
Number crunching :
Race to the New Moon Challenge
(Message 76670)
Posted 3294 days ago by ThrasherX-17
Ken_g6, but that happens only with LLRs. Other projects run well.
Q6600@3,08GHz
25.05.2014 10:58:42 | | Benchmark results:
25.05.2014 10:58:42 | | Number of CPUs: 4
25.05.2014 10:58:42 | | 2893 floating point MIPS (Whetstone) per CPU
25.05.2014 10:58:42 | | 9011 integer MIPS (Dhrystone) per CPU
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