PrimeGrid Challenges 2022

[StefanR5R]

PS:
a) How many tasks are you running at once? And how many threads per task did you configure?
b) Navigate to the BOINC data directory (help), from there into the slots/ subdirectories, and have a look at stdout and stderr files, with notepad or any other plaintext viewer. Check if there is anything suspicious logged in these files, or if in doubt, post representative examples of these files here.

 

[Markfw]

This can't be the norm.

The "Edit PrimeGrid preferences" web page shows for SR5:

Recent average CPU time: 17:38:12​

Let's say a reasonably modern CPU but with Hyperthreading enabled and with multithreading overhead needed not 17.6 CPU hours, but, let's say, 35 CPU hours. 7-threaded tasks should then complete after 5 hours.

Note, there are three types of tasks:

• "Verification tasks". These tasks are similar to "wingmen tasks" of other projects, except that they use a clever algorithm which makes these tasks very light weight. They complete after a few minutes.
• Regular tasks in the very rare case that an actual prime is found. These take up to four times as long as regular tasks which don't find a prime, according to the "Edit PrimeGrid preferences" page.
• Regular tasks. Here is an example: result ID 1357472901
  6-threaded task on Core i7-9700 (8c/8t Coffee Lake desktop CPU, i.e. no Hyperthreading, 3 GHz base clock), took 48,759 seconds CPU time and 8,935 seconds = 2.5 h run time according to the result page on the project server (which is not always reliable in these matters¹). The WU was 5,490 credits worth. Note that this computer runs PPS Sieve on the GPU in parallel, which takes a bit of performance away and may be the reason why the user did not give all 8 cores to the LLR application. That is, this computer probably runs 1 LLR task and 1 Sieve task at a time.

________
¹) I am not in the race myself yet, hence can only look at others' computers on the web for task runtimes.

@Bradtech519 , I have a 12700F with e-cores disabled. Other than that stock, with 3200 ddr4. I am running 15 threads at a time. My shortest first task was 73 minutes, or one hour 15 minutes. The other one about 1 hour 40 minutes. Here:

Valid tasks for computer 1138816

 

[Bradtech519]

@Bradtech519 , I have a 12700F with e-cores disabled. Other than that stock, with 3200 ddr4. I am running 15 threads at a time. My shortest first task was 73 minutes, or one hour 15 minutes. The other one about 1 hour 40 minutes. Here:

Valid tasks for computer 1138816

I'll look into disabling the e-cores. Only other thing I can think of is only using 1 8 pin CPU connector. It's all my new PSU had.

https://www.amazon.com/gp/product/B088SSX883/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[Bradtech519]

I don't believe it was using my preferences. I went and updated my preferences, and then added the tasks this morning. Might should have waited longer. Now it's down 1hr 20 minutes. With or without the e-cores. earlier it was overloaded on tasks. I just removed primegrid and added it back to get new tasks.

 

[Markfw]

I don't believe it was using my preferences. I went and updated my preferences, and then added the tasks this morning. Might should have waited longer. Now it's down 1hr 20 minutes. With or without the e-cores. earlier it was overloaded on tasks. I just removed primegrid and added it back to get new tasks.

View attachment 63231

You don't HAVE to disable e-cores, I was just telling you my complete config. Not sure how many threads you should specify with a 25 meg L3 cache.

 

[Skillz]

Each task uses 8MB of L3 cache. So take the L3 cache of the CPU, divide by 3. Take that number and divide by total number of threads. Thats how many threads each task should use. Disabling the E-cores would probably be better.

Your CPU seems to have 8-cores (p-cores) and 16 threads. With 25MB L3 cache you can run 3 at once. So you should run 5 (I'd go down to an even 4) threads per task.

 

[Markfw]

I would say 5 threads per task and it will run 3 tasks. The GPU needs one. That will total 15.

 

[Ken g6]

Day 1.125 stats:

Rank___Credits____Username
2______6964240____[TA]Skillz
8______1877706____Icecold
9______1730354____markfw
10_____1524546____crashtech
24_____676407_____biodoc
25_____646402_____wah
44_____355352_____Orange Kid
57_____245670_____Fardringle
58_____241691_____mmonnin
61_____209668_____cellarnoise2
102____105536_____Ken_g6
110____100209_____waffleironhead
148____52768______Lane42
156____48960______Bradtech519
217____17613___10esseeTony
308____244________catavalon21

Rank__Credits____Team
1_____24992464___Antarctic Crunchers
2_____14802909___TeAm AnandTech
3_____6784975____Ural Federal University
4_____6629247____Czech National Team
5_____5879549____SETI.Germany

We may not get first this time.

 

[Skillz]

Perhaps we should reach out to Gal, I see he's running Moo right now.

Not sure if I will be able to hold this till the end, so I took a screenshot now.

 

[StefanR5R]

I don't believe it was using my preferences.

IME, this is what's needed to apply modified threads-per-task settings to tasks:

a) if web preferences are used

• change settings on the web site
• request new tasks

I am not aware of a way to apply the changed web settings to previously downloaded tasks, although there may be one.


b) if a local app_config.xml file is used

• edit app_config.xml
• let the client re-read the config files
• suspend task to disk (i.e., don't let suspended tasks stay in memory for this occasion)
• resume task

That is, the threads-per-task setting of already downloaded tasks can be modified this way.
The last three bullet points can alternatively be performed via client shutdown and restart.

 

[Ken g6]

Day 2.125 stats:

Rank___Credits____Username
2______26455718___[TA]Skillz
8______4113683____Icecold
9______3556311____markfw
10_____3222964____crashtech
25_____1325751____wah
26_____1311769____biodoc
42_____794329_____mmonnin
47_____686223_____Orange Kid
55_____561958_____cellarnoise2
65_____407086_____Fardringle
103____214950_____SystemViper
114____196820_____Ken_g6
118____180819_____waffleironhead
141____133495_____Lane42
208____61055___10esseeTony
216____50549______Bradtech519
387____244________catavalon21

Rank__Credits____Team
1_____59979518___Antarctic Crunchers
2_____43168437___TeAm AnandTech
3_____14164343___Ural Federal University
4_____13592382___Czech National Team
5_____12605865___SETI.Germany

Happy Father's Day to all the fathers out there!

 

[Markfw]

Holding 9th !

 

[cellarnoise]

Well, 9th is great.!!
Xii is what?

 

[lane42]

8​	Icecold	TeAm AnandTech	6 228 779.35​	1 912​
9​	markfw	TeAm AnandTech	5 180 793.86​	1 585​
10​	crashtech	TeAm AnandTech	4 641 543.75​	1 785​

25​	w a h	TeAm AnandTech	1 927 442.70​	575​
26​	biodoc	TeAm AnandTech	1 842 892.17​	511​

49​	Orange Kid	TeAm AnandTech	938 408.20​	273​
50​	cellarnoise2	TeAm AnandTech	933 754.68​	273​

112​	Ken_g6	TeAm AnandTech	289 413.25​	86​
113​	waffleironhead	TeAm AnandTech	284 410.61​	63​

A few close race's

 

[Orange Kid]

Well.....
100 degrees outside and I have lost power.
Been 2 hours so far.
I'll be dropping like a rock in the standings.

 

[Markfw]

Where is todays stats ?

 

[Icecold]

Where is todays stats ?

This is current-

Rank​	Name​	Score​	Tasks​
2​	[TA]Skillz​	46,968,206.14​	15,413​
8​	Icecold​	7,274,486.69​	2,191​
10​	markfw​	5,947,608.87​	1,743​
11​	crashtech​	5,372,429.22​	2,021​
21​	xii5ku​	2,749,832.81​	814​
26​	w a h​	2,221,689.51​	650​
27​	biodoc​	2,138,528.08​	590​
41​	mmonnin​	1,466,790.02​	635​
50​	cellarnoise2​	1,084,993.44​	303​
51​	Orange Kid​	1,024,676.87​	293​
71​	Fardringle​	604,187.41​	132​
111​	Ken_g6​	341,616.12​	99​
121​	waffleironhead​	296,001.37​	66​
132​	Lane42​	271,461.17​	171​
196​	10esseeTony​	124,383.68​	34​
259​	Bradtech519​	50,549.83​	111​
443​	catavalon21​	244.21​	3​

 

[Ken g6]

Where is todays stats ?

Sorry, I thought @lane42's were enough.

 

[Markfw]

Sorry, I thought @lane42's were enough.

While those were nice, they excluded other members of the team that have contributed. I like everybody to get credit for their efforts.

 

[Skillz]

Lane was just posting the close races between team members. His intentions wasn't to leave anyone out. I'm sure he felt someone else would have posted the full stats update.

 

[StefanR5R]

A few close race's

26 hours left... I'm taking some shortcuts and hope to join one of these close races for the finale. :-)

 

[Ken g6]

Day 4 stats:

Rank___Credits____Username
2______55959824___[TA]Skillz
8______8635192____Icecold
10_____6952490____markfw
12_____6095138____crashtech
15_____4575035____xii5ku
27_____2621052____w a h
29_____2519013____biodoc
39_____1806238____mmonnin
49_____1308354____cellarnoise2
58_____1106075____Orange Kid
71_____699770_____Fardringle
111____396931_____Ken_g6
131____324125_____Lane42
136____308037_____waffleironhead
201____147311___10esseeTony
267____50549______Bradtech519
467____244________catavalon21

Rank__Credits____Team
1_____126123489___Antarctic Crunchers
2_____93630414___TeAm AnandTech
3_____30187109___SETI.Germany
4_____27640307___Ural Federal University
5_____26682915___Czech National Team

Edit: Please forgive my erratic behavior. My Dad passed away last night.

 

[lane42]

Ken g6, very very sorry to hear that.

 

[Orange Kid]

Oh no, so sorry for your loss.

 

[crashtech]

Condolences, Ken.