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Dingo
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« on: January 31, 2017, 09:21:13 AM »

Because this project uses all available CPU / Threads there is a app_config.xml to put in your /projects/sech.me_boinc_Amicable folder to restrict the number of CPU / Threads.  The down side is if the version changes you need to change this file to get work.

<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>
  <cmdline>--nthreads 4</cmdline>
  <avg_ncpus>4.000000</avg_ncpus>
 </app_version>
</app_config>


Change the 4 in both places to the number of CPU/Threads you want to run at once on this project and make sure there is a blank line at the bottom.

Cheers

PS:  I got this from the project forum and it is working on my machine.

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« Reply #1 on: February 06, 2017, 03:33:32 PM »

I noticed tonight that when you stop BOINC, change the app_config_xml and then start BOINC, all the tasks that were downloaded under the old specs are kept the same and only the new tasks downloaded have the changed specs.   Bang Head
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« Reply #2 on: February 06, 2017, 09:50:46 PM »

Haha, they really are a pain sent to test us, those multithreaded applications, aren't they?

I also fiddled around with the number of cores per task and the number of concurrent instances. Don't know if it was more efficient on Skylake box but found it more flexible and easier to allow other projects to run some tasks to have multiple instances running on fewer cores. For example on my 8 core Skylake box initially ran two instances of 3 cores each. On the 32 core dual socket Sandy Bridge initially ran four instances of 7 cores.*

The benefit of running multiple instances is you can change the number of instances running without stopping and restarting BOINC. This enables you to vary the amount of resources given to Amicable Numbers and give other projects a go on some cores if you wish. So I ended up running one instance of 3 cores on Skylake and two instances of 7 cores on dual Sandy Bridge. This allowed me to finish off the high credit CSG CPU tasks I had stored in my caches. It's easily done just by changing the <max concurrent> value in your app_config.xml and then clicking Options > Read config files in BOINC Manager.

Skylake:

<app_config>
 <app>
  <name>amicable_2_64</name>
  <max_concurrent>2</max_concurrent>
 </app>
 <app_version>
  <app_name>amicable_2_64</app_name>
  <plan_class>mt</plan_class>
  <cmdline>--nthreads 3</cmdline>
  <avg_ncpus>3.000000</avg_ncpus>
 </app_version>
</app_config>


Dual Sandy Bridge:

<app_config>
 <app>
  <name>amicable_2_64</name>
  <max_concurrent>4</max_concurrent>
 </app>
 <app_version>
  <app_name>amicable_2_64</app_name>
  <plan_class>mt</plan_class>
  <cmdline>--nthreads 7</cmdline>
  <avg_ncpus>7.000000</avg_ncpus>
 </app_version>
</app_config>


*For dual socket computers running a single multithreaded task on more than one physical CPU is less efficient as there are losses transferring data between the 2 CPUs and their memory. Something like that anyway.

Anyone with an Nvidia GPU who wants to do some Amicable Numbers crunching, Gerasim@Home recently released an application. On my GTX 970 current tasks take about 500 seconds and grant 3,000 credit. So a bit over 500K per day.

However as the processed numbers progressively get higher the runtime increases so unfortunately the credit rate is dropping substantially every day. I downloaded 1.8 days cache which will yield about 960k at the current credit rate. See what happens after that. Supposed to be benchmarked against a PrimeGrid GPU app so perhaps credit per task will be increased after a while. Don't know how long this subproject will run for, some Gerasim@Home projects finish quite quickly.

Danger, Will Robinson! Danger! This app runs my card very hard at 100% load and there are no adjustable parameters available to tone it down. This results in high GPU temperature compared to other GPU apps and very sluggish screen refresh so annoyingly slow scrolling anything. If you can cop that and/or have a computer you don't browse on then you could give it a go if you wish.




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Dingo
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« Reply #3 on: February 23, 2017, 07:26:13 AM »

Amicable Numbers: GPU application version
GPU application version is available for beta-testing now. Both AMD and NVIDIA GPUs are supported. To test it, enable "Run test applications" in project preferences here: https://sech.me/boinc/Amicable/prefs.php?subset=project
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« Reply #4 on: February 23, 2017, 12:18:41 PM »

Thanks for the info Dingo. Thumbs Up
I've just downloaded some.
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« Reply #5 on: February 23, 2017, 12:41:13 PM »

They have added a place in the preferences where you can restrict the number of CPU's  https://sech.me/boinc/Amicable/prefs.php?subset=project

« Last Edit: February 23, 2017, 12:48:05 PM by Dingo » Logged


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« Reply #6 on: February 23, 2017, 02:13:19 PM »

Am trying some.
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« Reply #7 on: February 23, 2017, 03:04:36 PM »

Yep Me Too  thanks Dingo.

Work units for the "test" at Amicable Numbers Dingo mentioned run for about 15 - 25 mins on Nvidia cards. They credit 1,618 per work unit. 

Note: It seems AMD cards are slow. My AMD HD 7970 is nearly twice as slow as all my other Nvidia cards averaging about 35 mins a work untit. :(


On a side note: I only just finished doing some Amicable Numbers at Gerasim a day or so ago but sadly for me I only found out about the sub project at Gerasim at the very last minute and so only got 20hrs worth.  But they credited very well and gave 1000 credit per work unit and only ran between  2 - 2.5 minutes each.  I sure wish I would have seen kashi's post a lot earlier. :( 

Not to worry no lack of good crunching around at the moment that's for sure.   Crazy Dance
« Last Edit: February 23, 2017, 06:16:33 PM by JugNut » Logged



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« Reply #8 on: February 24, 2017, 11:20:59 PM »

Greetings

Have jumped on board for a bit on this GPU part of this project, have clocked up enough units, to get to 100k, but I have a few in PV, so I wont hit this number till about tomorrow sometime.

Then its cards down and cpus up for the BOINCSTATS challenge.

Regards
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Dingo
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« Reply #9 on: February 25, 2017, 10:49:51 AM »

looks like you have about 500K pending so no problems there.  That was the last project that I had #1 in the Team, Crying  BUT good crunching there everyone.  Hope the Challenge is as good.   BOINC@AUSTRALIA Rocks

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« Reply #10 on: March 29, 2017, 02:50:51 AM »

Just in case you haven't read the notices section on Boinc Manager Amicable Number is now giving double credits.  The Admin says the tasks are now twice as big so he giving double credits. 

It may well change in the future but at the moment I haven't noticed much change in the work size at all.  A few less of the shorter ones perhaps but thats it.

« Last Edit: March 29, 2017, 02:52:32 AM by JugNut » Logged



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« Reply #11 on: March 29, 2017, 05:48:47 AM »

Cool, Thanks. I put 4 GPU's on it for now.

EDIT: WOW ... 7,700 credits/hr is rather good.  Big Grin Jester
« Last Edit: March 29, 2017, 06:35:12 AM by Dataman » Logged


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« Reply #12 on: April 10, 2017, 11:22:10 AM »

I just noticed that Amicable Numbers has released a new badge system. This time it's credit based.  Crazy Dance 

https://sech.me/boinc/Amicable/forum_thread.php?id=60#410

« Last Edit: April 10, 2017, 12:43:13 PM by JugNut » Logged



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