[tictoc]

December Projects of the Month

[email protected]

Start: 22 - Goal: 21 - End: 22 | It has been more than three years since we had LHC as a POTM.

SRBase

Start: 36 - Goal: 30 - End: 26 | It is a bit of feast or famine for tasks, but if the queues are kept full we can probably move up a number of spots.

[email protected]

Start: 22 - Goal: 21 - End: 22 | Will be a heck of a month if we can move up to 21, but we can give it a go.

A bit of a different mix for the last month of the year.

 

[emoga]

I'll switch over to SRBase. Still got some badges to grind.

 

[tictoc]

I have been having issues with Einstein. Not sure what the deal is, but I am getting driver crashes on my 290s and my 1070s. No issues on my 480 which is running the same OS and drivers as my 290s and 1070s.

After killing the stuck tasks, they go into uninterruptable sleep and I have to shutdown and reboot in order to clear the stuck tasks. I haven't had time to see what is going on, but hopefully I can get it sorted out over the weekend.

 

[emoga]

Looks like my Ryzen 1800X has terrible performance compared to my slower intel 2670 v0 processors when crunching SRBase.

I scanned through the top computers and the first Ryzen that appears is at #190 place...

 

[tictoc]

Quote:

Originally Posted by emoga

Looks like my Ryzen 1800X has terrible performance compared to my slower intel 2670 v0 processors when crunching SRBase.

I scanned through the top computers and the first Ryzen that appears is at #190 place...

There is really no way that a 2670 should be 20% faster than an 1800X. The only thing I could find was a post from April where rebirther said that it is not optimized for Ryzen yet.

I just loaded it up in Linux to see if it is a Windows issue, or if Ryzen is just knee-capped on this project

*Edit* I show the same results in Linux. My R7 1700 is about 30% slower than my 2670v2

You might try and start a thread in the forums, since rebirther is active and is obviously optimizing the project with the use of AVX, AVX2, and FMA3.

 

[AlphaC]

LHC seems to be mostly ATLAS units (i.e. using VirtualBox) right now.

 

[mmonnin]

All I've gotten the past few weeks have been Atlas. There was a post about it somewhere on their forums. Got 4 threads of 1950x (ends up utilizing about 2.5-3) and about 1 threads worth of a 3570k. 9.8gb of memory usage on the 1950x and 5.3gb on 3570k.

Finished my Moo tasks and moved over the RX 580 to [email protected]

 

[tictoc]

Just fired up six 4-core Atlas tasks on my 2P. Running six 4-core tasks uses roughly 35GB of memory on my 2P. I did have to use an app_config with a much higher memory allocation than anything I saw on the forums, in order for the tasks to truly use 4 cores per task.

Maybe they just take a while to start and I could have left the memory set at a lower value, but for the first thirty minutes each of the six tasks I was running were only using a single thread. Once I upped the memory to 40GB in the app_config, the tasks immediately started using 4 threads each.

 

[mmonnin]

Quote:

Originally Posted by tictoc

Just fired up six 4-core Atlas tasks on my 2P. Running six 4-core tasks uses roughly 35GB of memory on my 2P. I did have to use an app_config with a much higher memory allocation than anything I saw on the forums, in order for the tasks to truly use 4 cores per task.

Maybe they just take a while to start and I could have left the memory set at a lower value, but for the first thirty minutes each of the six tasks I was running were only using a single thread. Once I upped the memory to 40GB in the app_config, the tasks immediately started using 4 threads each.

They either take awhile to get up to higher CPU usage or it takes awhile to write nearly 10gb of data. They go from less than 1 core of CPU time to something like 2.5 cores for me when set to 4. I run a couple of CPU tasks on my 2nd client for GPUs to keep the CPU busy at all times.

 

[mmonnin]

Was browsing LHC forums and found a thread about this topic. Looks like 4, 5 and 3 threads are the most efficient.

https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4479#32732

 

[tictoc]

I saw the same thing when I was digging around to try and find out why each of the tasks I was running were only using about 20% of a thread, instead of the 400% I expected to see.

@mmonnin is correct, and it is just a matter of waiting for the tasks to ramp up to full usage. Screenshot below is six 4-thread tasks running. One of the tasks had only been running for about 10 minutes. It is not using any CPU, while the other 5 tasks are using 400+%.



*Edit* After waiting a few more minutes, the new task is now at full usage.

 

[mmonnin]

Anyone know if its just some pre-calculations, VM setup, loading the large dataset to mem or something? Like wheres the bottleneck to get to full cores. I just have an el cheapo 120gb SSD on mine that might take a bit to load 9.8gb.

 

[CasperGS]

How do you change user name in [email protected]??

 

[mmonnin]

Quote:

Originally Posted by CasperGS

How do you change user name in [email protected]??

Account ->Preferences->Community

See if that changes your BOINC ID or just the one on the forum.

https://einsteinathome.org/account/prefs/community

Not the only one to ask:
https://einsteinathome.org/content/how-change-my-account-name

 

[CasperGS]

Quote:

Originally Posted by mmonnin

Account ->Preferences->Community

See if that changes your BOINC ID or just the one on the forum.

https://einsteinathome.org/account/prefs/community

Not the only one to ask:
https://einsteinathome.org/content/how-change-my-account-name

Seems like everything is outdated, unable to locate ability to change username or set gpu use only on website or application (ver 7.8.3) or im stupid and cant figure it out.

 

[CasperGS]

Scratch that, I figured it out for username, but cant get it to run gpu only

 

[tictoc]

Quote:

Originally Posted by mmonnin

Anyone know if its just some pre-calculations, VM setup, loading the large dataset to mem or something? Like wheres the bottleneck to get to full cores. I just have an el cheapo 120gb SSD on mine that might take a bit to load 9.8gb.

I haven't had a chance to log what's going in and out of the VM when the ATLAS tasks start, but according to this post it is downloading the dataset for the task. https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4440&postid=32442

Once that is complete then the WU launches with a single process

Quote:

The slides also explain the large initialisation time - running a single process for as long as possible in order to share as much memory as possible between the processes.

Link to post on ATLAS forums: https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4165&postid=29433

After reading through all of that and a bunch of other posts regarding ATLAS efficiency, I am probably going to change my settings to run 12*2-core tasks, rather than the 6*4-core tasks I am currently running. Memory usage is not an issue on my 2P, but I'm not sure how it will affect disk usage. Running 6*4-core tasks, ATLAS is using 18GB of space on my hard drive, so even if that doubles, I should have plenty of available space.

 

[mmonnin]

Quote:

Originally Posted by CasperGS

Scratch that, I figured it out for username, but cant get it to run gpu only

There is an option to run CPU versions of GPU tasks. Is that checked? Separate location?

 

[CasperGS]

Quote:

Originally Posted by mmonnin

There is an option to run CPU versions of GPU tasks. Is that checked? Separate location?

I ended up changing it to 1% cpu usage, it wouldnt let me do 0%, that fixed my issue, ty

 

[tictoc]

POTM Update

[email protected]

Start: 22 - Currently: 23 - End: | CERN was only doing about 45k per day when I set the goal, so I didn't see them being able to catch us.

We are only a few days away from passing our original target the Dutch Power Cows.

SRBase

Start: 36 - Currently: 30 - End: | Goal achieved.

We also have a shot at moving into the top 25 before the end of the month.

[email protected]

Start: 22 - Currently: 22 - End: | We are creeping up on Team Russia, and with the boost from @lanofsong the gap is getting narrower.

Great start to the month.