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-   -   New Project: Amicable Numbers (https://www.overclock.net/forum/365-overclock-net-boinc-team/1622474-new-project-amicable-numbers.html)

 bfromcolo 02-04-2017 08:47 AM

A new math project to find amicable numbers.

https://sech.me/boinc/Amicable/

If you were wondering what an amicable number is, from Wikipedia:

Amicable numbers are two different numbers so related that the sum of the proper divisors of each is equal to the other number. (A proper divisor of a number is a positive factor of that number other than the number itself.

The smallest pair of amicable numbers is (220, 284). They are amicable because the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, of which the sum is 284; and the proper divisors of 284 are 1, 2, 4, 71 and 142, of which the sum is 220.

Not sure these have much more value than trillion digit primes, but its something to crunch for WUProp stars.

 Tex1954 02-04-2017 02:34 PM

Well, I put one setup on it to see what it's about...

 tictoc 02-04-2017 03:03 PM

The tasks for this project are multi-threaded.  It will be interesting to see how they perform. I have completed 4 tasks so far.  The run-times are pretty similar, but the points vary.

 Run time (sec) CPU time (sec) Credit 3,512.95 17,522.73 816.96 3,602.06 17,962.75 943.09 3,585.81 17,880.21 1,566.90 3,956.17 19,732.88 1,097.92

 bfromcolo 02-04-2017 03:50 PM

Trying to make space in one of my systems to try this out, looking on their boards you can control the number of CPUs used by an individual task through the app config:

Quote:

```<app_config>
<app>
<name>amicable_2_64</name>
<max_concurrent>1</max_concurrent>
</app>
<app_version>
<app_name>amicable_2_64</app_name>
<plan_class>mt</plan_class>
<avg_ncpus>15.000000</avg_ncpus>
</app_version>
</app_config>
```

 Tex1954 02-05-2017 12:47 AM

4,278.75 33,967.68 1,032.98
3,904.71 31,003.49 1,256.10
3,823.44 30,391.79 1,275.44
4,007.67 31,852.80 1,434.43

These on a setup using 8T of E3-1240V2 CPU.

 bfromcolo 02-05-2017 05:12 AM

I have finished 4 of them, using 5 cores on a 6300 (stock), Mint 17.3.  7850 sec run times, 39000 sec of CPU time, but all tasks are still pending credit.

WUProp seems to be smart enough to measure CPU time for run time in this case, or run time times cores.  The only other multi-core project I remember running was Atlas and in that case WUProp looked at run time and not the number of cores involved.

 k4m1k4z3 02-05-2017 09:04 AM

I will fire this up on one of my laptops for a while. I have too many projects I want to run and not enough CPU cores... Perhaps I will have to build another 2P when my bonus check arrives in a few months

 BeerCan 02-05-2017 01:06 PM

Just so I know, what the heck is this research good for? Anyone know?

 bfromcolo 02-05-2017 01:19 PM

Quote:
Originally Posted by BeerCan

Just so I know, what the heck is this research good for? Anyone know?

As far as I know it just finds amicable number pairs up to 2^64, and there probably isn't much application for them.  Although Wikipedia says they may have mystical powers, it also says there are over 1B known pairs, so I don't know it the ones this project is finding have been found before or are new ones.

https://en.wikipedia.org/wiki/Amicable_numbers

 Tex1954 02-05-2017 11:04 PM

Quote:
Originally Posted by bfromcolo

As far as I know it just finds amicable number pairs up to 2^64, and there probably isn't much application for them.  Although Wikipedia says they may have mystical powers, it also says there are over 1B known pairs, so I don't know it the ones this project is finding have been found before or are new ones.

https://en.wikipedia.org/wiki/Amicable_numbers

Umm, JUST? 1 x 2^64 is a MUCH higher number than 1 x 10^18... I think it will take a while...

And like many math projects, especially PRIME projects, they climb that arithmetic mountain "Because It's There!" and for no other practical reason I can ascertain....

LOL!

PS: This about all I am going to do, two are pending... I may give a couple to the 2P setup just for grins later...

 WhiteWulfe 02-09-2017 08:53 AM

Interesting concept for a project. I might fire it up for a bit and see where it goes... Aka I need WUProp hours for my fourth star >. >

 mmonnin 02-13-2017 03:27 PM

GPU app incoming:

 BeerCan 02-13-2017 06:09 PM

I wish we would get more medical gpu apps

 WhiteWulfe 02-13-2017 06:12 PM

Agreed. Medical gpu apps would be amazing to have again!

 BeerCan 02-13-2017 06:53 PM

Quote:
Originally Posted by WhiteWulfe

Agreed. Medical gpu apps would be amazing to have again!

I think TN-Grid may be contemplating one. Their volunteer developer Daniel has been doing amazing work for them.

 WhiteWulfe 02-13-2017 07:08 PM

Quote:
Originally Posted by BeerCan

I think TN-Grid may be contemplating one. Their volunteer developer Daniel has been doing amazing work for them.

That's awesome to hear, because, well... In short... They're steadily becoming my favourite project (alongside DENIS now that it has regular work). Others are nice due to their broad appeal (WCG, another one where rumours of a gpu app are swirling) or specific focus on areas of major interest to me ([email protected]) but yeah.... If they get a gpu app going... They'll definitely become a major priority for me ^_^

 mmonnin 02-13-2017 07:41 PM

I think I heard that Rosetta calculations weren't suited for GPU work, like it wasn't parallel enough for GPUs or something.

One of these days Universe will get a GPU client going and I'll slap that 280x on it. So many projects, not enough processors.

 WhiteWulfe 02-14-2017 04:36 AM

Quote:
Originally Posted by mmonnin

I think I heard that Rosetta calculations weren't suited for GPU work, like it wasn't parallel enough for GPUs or something.

One of these days Universe will get a GPU client going and I'll slap that 280x on it. So many projects, not enough processors.

Yeah, I think I remember reading something along that line regarding Rosetta as well. Universe getting a gpu app would be nice - I hope their beta doesn't wind up taking too long, AND gets ported over to nvidia cards as well, even if it's still using OpenCL and the cpu thread lockdown "problem" it tends to have.

 k4m1k4z3 02-23-2017 07:39 PM

In case anyone missed, the GPU app is out in beta testing now.

 emoga 02-23-2017 08:17 PM

Quote:
Originally Posted by k4m1k4z3

In case anyone missed, the GPU app is out in beta testing now.

Thanks, trying it out now

 tictoc 02-26-2017 07:22 AM

 WhiteWulfe 02-26-2017 07:33 AM

Added in my GTX 980 Ti to the mix ^_^

 k4m1k4z3 02-28-2017 04:23 AM

Quote:
Amicable Numbers: GPU application version
GPU application version is available for beta-testing now released as of February 28th. Both AMD (HD 5xxx or newer) and NVIDIA GPUs are supported. 1 GB of video RAM is required. To test it, enable "Run test applications" in project preferences here: https://sech.me/boinc/Amicable/prefs.php?subset=project

Looks like it is out of beta. If you were not intending to run the project on your GPU, you might want to check your settings.

 bfromcolo 03-03-2017 01:12 PM

The site says I have discovered 4 amicable numbers!

144 "BOINC: bfromcolo, Sergei Chernykh" 2017
1670955096662970790=2*5*7*37*73*54059*163483583
1907767206084554330=2*5*37*71*1627*65719*679183

245 "BOINC: bfromcolo, taurec" 2017
2106500495461250630=2*5*7*29*1279*5741*141321239
2380584995157117370=2*5*29*151*283*521*10559*34919

344 "BOINC: bfromcolo, fastgeek" 2017
2856894125877910930=2*5*7*29*6659*185483*1139423
3223752871411868270=2*5*29*79*3607*51503*757457

466 "BOINC: pelpolaris, bfromcolo" 2017
11739605364198511310=2*5*7*37*179*3631*4139*1684919
13214618118542224690=2*5*29*137*191*683*14779*172519

Guess I need to somehow translate those to lotto numbers or something.  These must be easier to find then big primes because I don't think I have ever found one of those.

 k4m1k4z3 03-03-2017 03:16 PM

Hahaha, would I get in trouble if I posted all of the amicable numbers I found?

Amicable pairs discovered: 4511

There are 110 that I found myself...
ctrl + f: "BOINC: k4m1k4z3"

 bfromcolo 03-03-2017 06:26 PM

Quote:
Originally Posted by k4m1k4z3

Hahaha, would I get in trouble if I posted all of the amicable numbers I found?

Amicable pairs discovered: 4511

There are 110 that I found myself...
ctrl + f: "BOINC: k4m1k4z3"

Wow! You have must have been running this for a while.  It's kind of neat to have the results reflect that you accomplished something, not a lot of projects that provide any feedback even if it is just a weird math problem.

 mmonnin 03-19-2017 02:28 PM

App is 36% complete so far:
https://sech.me/boinc/Amicable/server_status.php

Project admin said most amicable pairs will be found before 50% completion. I have found 37 out of 52 tasks with credit so a pretty high rate. But if you want to get the badge for Amicable Pairs found you might want to get on it now. A task takes about 5min on my 1070. Even with it being OpenCL there is very little CPU usage so I'm running 4x on both the 1070 an 970 for WUProp hours. GPU utilization runs at 100%.
Quote:
227,482 amicable pairs have been found so far, ~340,000 are yet to be found according to my estimations. Due to the way this search is organized and how amicable numbers are distributed, I expect almost all of those ~340k pairs to be found before the search reaches 50% in a couple of weeks, and only a few thousand of new pairs will be found after 50%. So if your target is to get some of the discoverer badges, now is the time to crunch with everything you've got.

Since there will be only a few new pairs after 50%, this is when I'll introduce credit badges.

 tictoc 03-19-2017 02:31 PM

Other than WUProp hours, is it more efficient to run concurrent tasks?

 mmonnin 03-19-2017 02:44 PM

Quote:
Originally Posted by tictoc

Other than WUProp hours, is it more efficient to run concurrent tasks?

Probably not. Still high GPU usage, 99-100% most of the time. Just a dip when switching tasks, like a second, but then pegged at 100% again.

Coming from running 4x [email protected] tasks I get to run 8x CPU threads all full throttle again, which is nice.

ProcessLasso is showing less than 1% CPU usage per task. 0.6-0.8% of the whole CPU per task.

 k4m1k4z3 03-19-2017 02:45 PM

I see that my 980 isnt quite as loaded down, there might be some improvement from running two....
I am making a push for 10,000 pairs before it is too late I currently have 6781

 WhiteWulfe 03-19-2017 02:53 PM

I haven't gotten a single pair yet, but fired it up again to get the 200 badge as a "why not" situation ^_^

Edit: but we'll see about that since it puts out a rather decent amount of heat, not to mention how long would it take to find that many (since running 100 hours worth of tasks netted me zero)

 mmonnin 03-19-2017 05:07 PM

Hmm 4x with a full CPU load was giving sporadic GPU usage so back down to 3x.

 WhiteWulfe 03-19-2017 10:22 PM

Well, I'm up to 8 now, and k4m1k4z3 was paired with me for a quarter of them ^_^

EDIT: After the Foldathon, I suspect I'm going to put a few days of work in to try and get at least one of the badges. I'm not normally a badge hunter, but the past few months I've taken to at least trying for them once a project has made mention of the fact that it's time limited/sensitive (aka only so much work left)

 k4m1k4z3 03-20-2017 04:49 AM

Its only 2 out of 18 now.
It is fun when you confirm your own numbers too, nobody else can claim that they helped find that number.

 WhiteWulfe 03-20-2017 04:58 AM

Quote:
Originally Posted by k4m1k4z3

Its only 2 out of 18 now.
It is fun when you confirm your own numbers too, nobody else can claim that they helped find that number.

Awwwww, oh well, it was fun to see a decently high percentage involving teammates at first... I am hoping that being up to 18 already means that the 200 badge won't take too too long... Although I might go for the next ranking simply because it would be kinda nice to register at least 500 hours in WUProp too.

 k4m1k4z3 03-20-2017 05:06 AM

At some point I will pull the list of all my numbers and make a count of teammates

 mmonnin 03-20-2017 05:13 AM

I got over 100 last night. Although it doesn't show up on Free-DC.

Quote:
I've added the Drug Discovery badges. Amicable, I'm not sure how to handle just yet. I may have to breakdown and just write a parser for the xml

 WhiteWulfe 03-20-2017 09:51 AM

Oh sweet, DrugDiscovery has badges too now? ^_^

Edit: guess that's going into the "I'll run it soon" queue then

 mmonnin 03-20-2017 10:08 AM

Haha yeah. They show up big on Free-DC as well. It's on my list as well for badges.

 WhiteWulfe 03-20-2017 10:10 AM

I think the biggest thing for me at the moment is whether or not to go for that 5k Amicable Numbers badge. Why? It's orange, that's why

But yeah, it's definitely nice to see more projects offering up badges, as it makes it more enticing to spend a bit more time on projects that may not be a person's core focus ^_^;;;;

 mmonnin 03-20-2017 07:47 PM

Not sure I can hold this guy back. I'm gonna need more hardware.

Only 6.27 million years until they pass me.

 emoga 03-21-2017 07:29 AM

Just noticed that the 'Amicable pairs' badge now shows up on FreeDC

 WhiteWulfe 03-22-2017 05:25 AM

Grrrf, I'd be a lot closer to at least the 100 found badge if the server would stop cancelling my work units 8-11 hours AFTER I finished them! Four work units killed off this way already.

 mmonnin 03-22-2017 05:57 AM

Hmm I checked and have 25 of those. 33 more invalids with a canceled WU message. All this morning. I guess thats why I had none when I woke up and checked on it. An update got more work right away. 1.55million points and 825 pairs.

 TwirlyWhirly555 03-22-2017 09:26 AM

Just put my pro duo on this , Anyone change the kernel size under the preferences ?

 mmonnin 03-23-2017 05:50 PM

v1.12 was producing bad results so app version went back to 1.11. WUs were canceled/invalid but they don't count towards the autoban.

1k Pairs on 1600 Tasks. Since this takes so little CPU usage I think I'll keep crunching this until end of the Sprint.

 WhiteWulfe 03-23-2017 06:02 PM

The weird thing though... All four of mine were cpu 1.11, so why they were cancelled I'll never know.

On the flipside, got my 100 found badge, so for now I'll stop in order to focus on yoyo for the weekend alongside my regular projects.

 TwirlyWhirly555 03-24-2017 08:28 AM

Half way to 100 pairs badge : D , 55 pairs so far from 170 valid tasks .

 bfromcolo 03-24-2017 09:32 AM

I only have 8, guess I better start running this again...

 WhiteWulfe 03-24-2017 09:42 AM

Looks like I'll be sticking around 104 as I don't have that many left pending. Oh well, good enough. ^_^

 TwirlyWhirly555 03-25-2017 03:16 AM

Got it to run 1 CPU task with (8 CPUs) and two GPU tasks with 0.2 CPUs , CPU usage sits at 75% and both GPUs sit at 99 - 100%

CPU is at 3.4Ghz , GPUs 1115 Mhz ( I did do 1180Mhz ) but things got warm : P .

 mmonnin 03-25-2017 07:58 PM

Not sure what happened with the tasks here but today my two cards have done 948,168 according to Free-DC. About 200k more than any other day so far. Looking at my history the completion times are all over the place. From as low as 2min to 1 hour today. I'm still doing 3x but even at a single task the 1st ones I did were taking 5min each. One yesterday took 8 seconds.

 TwirlyWhirly555 03-26-2017 12:16 AM

I had alot under 5 minuets with some being 12 minuets , but they do seem the change a lot .

got 214 pairs from 411 tasks so far

 bfromcolo 03-27-2017 06:07 AM

Found this in my BOINC notifications:

Quote:
Amicable Numbers: Update on project progress and badges
227,482 amicable pairs have been found so far, ~340,000 are yet to be found according to my estimations. Due to the way this search is organized and how amicable numbers are distributed, I expect almost all of those ~340k pairs to be found before the search reaches 50% in a couple of weeks, and only a few thousand of new pairs will be found after 50%. So if your target is to get some of the discoverer badges , now is the time to crunch with everything you've got.

I was thinking of this for the POM GPU project for April, but it doesn't sound like it is going to be around for long.  Get your stars and badges while you can.

 k4m1k4z3 03-27-2017 09:47 AM

Got my 10k badge... maybe I can make it to 20?

 bfromcolo 03-27-2017 09:51 AM

Quote:
Originally Posted by k4m1k4z3

Got my 10k badge... maybe I can make it to 20?

Thinking more like 200...

 mmonnin 03-27-2017 09:53 AM

I had gotten 2k pairs and was 26 hours short of 1k WUProp hours. D'oh! So I gotta go back for a few more.

 WhiteWulfe 03-27-2017 10:26 AM

I'm happy with my 100 pairs badge and 500 hours. It could be tempting to push for 200 pairs but I kind of miss some of my other projects already (especially after running yoyo for the weekend).

 mmonnin 03-28-2017 03:31 AM

Credit has doubled for a bit to 50%. 47.946% complete so far.
Quote:
It appears that current work units are 2 times slower on average, so I've set credit per WU to 3236.07 temporarily (2 times more than usual). This is until the project reaches 50%, when a whole new type of WU will start, so I'll revise credit per WU once again then.

 bfromcolo 03-31-2017 05:29 AM

I am up to 989 ANs but it sounds like tough sledding the rest of the way.

Quote:
There are very few undiscovered amicable numbers left, somewhere between 5,000 and 15,000 in total for the remainder of the search.

 mmonnin 04-09-2017 09:06 PM

 WhiteWulfe 04-09-2017 09:16 PM

Quote:
Originally Posted by mmonnin

Insert copious amounts of grumbling here because I need to get another 500k to get the badge....

Edit: I only need another 440k but still. It's almost as annoying as doing the extra tasks in CSG aaaaaand it not showing any evidence that you spent two hours watching wildlife videos or another two hours sorting through a thousand photos... Tracked my climate tweets though, although I apparently didn't even get 50% valid loo

 mmonnin 04-10-2017 05:31 AM

Haha, It shouldn't take long with the Ti though. A day or two. I think since the point badges were added it messed with the Free-DC badge banner as neither show up now.

The top badge is 1billion and no one is anywhere close to that and probably won't get there before the project ends. Maybe there will be another app later as I won't be running duplicate work as the admin mentioned.

 WhiteWulfe 04-10-2017 08:05 AM

Quote:
Originally Posted by mmonnin

Haha, It shouldn't take long with the Ti though. A day or two. I think since the point badges were added it messed with the Free-DC badge banner as neither show up now.

The top badge is 1billion and no one is anywhere close to that and probably won't get there before the project ends. Maybe there will be another app later as I won't be running duplicate work as the admin mentioned.

True enough... It had already gone up 100k thus morning when I checked, so hopefully it will just take a day to do the rest. Trying to keep the living room at a reasonable temperature, which is why I'm slowly switching over to mostly cpu crunching...

... Which kind of works out because I'm still kind of semi-tempted to get a Natex bundle (or wait for Ryzen Naples), and then maybe slap a pair of 1050 Ti's in there with it so it would do more work but put somewhat less heat into the place. Only issue is that two 1050 Ti's isn't that much lower for heat output compared to a 980 Ti.

Natex bundle would be neat to get, especially if put into the upcoming CaseLabs BX8 as air cooling the rig wouldn't be an issue (and I'd get 4x the amount of work done)

 mmonnin 04-18-2017 05:26 PM

Quote:
Originally Posted by WhiteWulfe

True enough... It had already gone up 100k thus morning when I checked, so hopefully it will just take a day to do the rest. Trying to keep the living room at a reasonable temperature, which is why I'm slowly switching over to mostly cpu crunching...

... Which kind of works out because I'm still kind of semi-tempted to get a Natex bundle (or wait for Ryzen Naples), and then maybe slap a pair of 1050 Ti's in there with it so it would do more work but put somewhat less heat into the place. Only issue is that two 1050 Ti's isn't that much lower for heat output compared to a 980 Ti.

Natex bundle would be neat to get, especially if put into the upcoming CaseLabs BX8 as air cooling the rig wouldn't be an issue (and I'd get 4x the amount of work done)

Just for you, dude. 100k, 200k, 500k badges. Just saw this in my Notices.

 WhiteWulfe 04-18-2017 05:29 PM

Quote:
Originally Posted by mmonnin

Just for you, dude. 100k, 200k, 500k badges. Just saw this in my Notices.

Definitely nice to see they came up with lower badges. I snagged a 1mil badge, but definitely happy you don't have to move that high up.

Now if only we could talk the TN-Grid guys into a 10k and 25k badge

 Egilman 05-30-2017 08:40 AM

Though I would throw this on the 48 core and see what it does.

Both CPU and GPU, the Tahiti does a wu in about 4:45 the E5 does one in 6:10.

Smooth as silk......

 Egilman 05-30-2017 08:47 AM

Quote:
Originally Posted by bfromcolo

Found this in my BOINC notifications:

I was thinking of this for the POM GPU project for April, but it doesn't sound like it is going to be around for long.  Get your stars and badges while you can.

Posted on the Forum on May 10th....
Quote:
The next goal will be search for all amicable numbers up to 10^20. It's ~5.4 times bigger than 2^64, so the project will last for several more years.

Looks like it's going to be around a while...

 WhiteWulfe 05-30-2017 09:14 AM

Huh, maybe I'll have a chance at getting the higher up badges after all... But the question then is do I want to run a math project

 bfromcolo 05-30-2017 09:15 AM

Right I think the difference will be the rate at which the numbers are found.  There for a while you could find hundreds in a few days.

 mmonnin 06-08-2017 03:45 PM

Current app of 2^64 is also complete and there will be a new 10^20 app come up right after.

Get the app hours in now if you want them.

 k4m1k4z3 06-08-2017 04:31 PM

Crap. I need almost 2 days to reach my 25,000 hours

 mmonnin 06-08-2017 04:33 PM

Quote:
Originally Posted by k4m1k4z3

Crap. I need almost 2 days to reach my 25,000 hours

I ran multiple tasks at once for more hours:
Code:
``````<app_config>
<app>
<name>amicable_2_64</name>
<max_concurrent>8</max_concurrent>
<gpu_versions>
<gpu_usage>0.33</gpu_usage>
<cpu_usage>0.1</cpu_usage>
</gpu_versions>
</app>
</app_config>```
```

 k4m1k4z3 06-08-2017 04:51 PM

Most of my hours come from CPU work.. But it gives me the idea to fire up additional clients. Should work the same, right?
Also setting my GPUs to run 3 at a time will help though.

 mmonnin 06-08-2017 05:34 PM

Quote:
Originally Posted by k4m1k4z3

Most of my hours come from CPU work.. But it gives me the idea to fire up additional clients. Should work the same, right?
Also setting my GPUs to run 3 at a time will help though.

Yup, should work the same.

 mmonnin 06-30-2017 04:47 PM

The 10^20 app will be out tomorrow:

Quote:
It will be started tomorrow (July 1st)!

I've decided to speed up the launch of the next search due to performance issues with GPU version that everyone experiences now.

What will happen on July 1st:

1) "Amicable Numbers up to 10^20" application will start receiving tasks.
2) All GPU versions for the old application "Amicable Numbers up to 2^64" will be deprecated.
3) Credit points for both applications will be re-balanced to make sure that RAC doesn't change.

So all GPUs should automatically switch to the new application, and the old application will remain as CPU-only until it finishes.

Edit: If it's like the last search it would be good to get it on it early before the numbers become big and the tasks get more and more CPU bound. Might be more numbers to be found as well.

 WhiteWulfe 06-30-2017 08:13 PM

I kind of like the idea of running it for a bit and getting up to orange badges if at all possible ^_^

 Tex1954 07-01-2017 03:28 AM

The new 10_20 task utilizes the GPU @ 100% with Kernels set to 23... at least on my 970's and 980.

 bfromcolo 07-01-2017 05:18 AM

Still getting 2^64 tasks for CPU as well as the new 10^20 ones.

 mmonnin 07-01-2017 06:04 AM

Yup, you can disable the old app.

3.5mil pairs available to count towards the badge.

 tictoc 07-01-2017 07:03 AM

I will probably keep plugging away at the old app.  Hate to see the rest of that range untested (even though all the previously known pairs were found), since most people will move on to the new search.

I wonder if the new app is optimized for the larger data set.  This search range is 100 Quintillion vs the previous search which was 18 Quintillion (plus a few hundred quadrillion)

 bfromcolo 07-01-2017 07:20 AM

The new one runs a lot longer, at least the CPU version.

 tictoc 07-04-2017 10:27 AM

Once I wrap up some Collatz tasks, I will be back crunching the the 2^64 app.  No surprise that nearly everyone moved on to the new app.

The project admin has added some additional incentive to crunch the 2^64 app. Credits for the old application (search up to 2^64) doubled

Quote:

Amicable Numbers: Credits for the old application (search up to 2^64) doubled

It's sad to see everyone leave the old (and unfinished) application "Amicable Numbers up to 2^64" so I decided to double credit points for it.

 mmonnin 07-04-2017 12:15 PM

People left since it's CPU only now for the old app. To be expected really.

 tictoc 07-04-2017 12:22 PM

Quote:
Originally Posted by mmonnin

People left since it's CPU only now for the old app. To be expected really.

I didn't realize the 2^64 tasks were CPU only now.  I was getting ready to fire up 12x tasks on my 1070.

CPU only does make more sense, with the massive amount of CPU overhead that I saw running 12x GPU tasks.

 Diffident 07-04-2017 03:59 PM

I just started running this today on my i3. CPU only tasks, but something seems strange. Boinc manager says that I'm running a single Amicable numbers multi threaded task using 4 CPU's which is the total number of threads i3's have....but heres the kicker....3 Primegrid tasks are also running at the same time, which would be 7 threads on a 4 thread CPU. So either Amicable numbers is really only using 1 thread while saying it's using 4, or my CPU is performing an incredible juggling act.

 tictoc 07-04-2017 04:34 PM

It might be performing a juggling act.  I believe that it is possible for BOINC to over commit CPUs if one of the projects is a multi-threaded project.  You can also select the number of CPUs to use in the Amicable Numbers Preferences.  What does it look like in htop?

 mmonnin 07-04-2017 04:53 PM

 Diffident 07-04-2017 06:56 PM

Quote:
Originally Posted by tictoc

It might be performing a juggling act.  I believe that it is possible for BOINC to over commit CPUs if one of the projects is a multi-threaded project.  You can also select the number of CPUs to use in the Amicable Numbers Preferences.  What does it look like in htop?

I didn't think about looking at it in htop....I wish I had. It seems to have corrected itself. It's currently running 1 task while CSG and Asteroids tasks are waiting to run.
Quote:
Originally Posted by mmonnin

Did you update the app_config after the task was downloaded? Then it won't update the # of threads in the display even if its using a different number of threads.

I haven't made an app_config yet...I haven't gotten that far into it.

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