Welcome to MilkyWay@home

Posts by Kevin Roux

1) Message boards : Number crunching : Joining a Team (Message 77097)
Posted 2 days ago by Profile Kevin Roux
Post:
The error should be fixed now. Let me know if you still experience trouble joining a team.
2) Message boards : Number crunching : Joining a Team (Message 77096)
Posted 2 days ago by Profile Kevin Roux
Post:
I am unable to join my Team Boinc@Australia. When clicking join this team I receive the following error:

Deprecated: Creation of dynamic property BoincTeam::$refcnt is deprecated in /home/boinc/boinc/milkyway/html/user/team_search.php on line 67.

Can anybody help me identifying where the problem lies. ?


Its probably an error on our end. I will look into it.
3) Message boards : News : Admin Updates (Message 77095)
Posted 2 days ago by Profile Kevin Roux
Post:
Hello everyone,

Update
- Wording for the new settings that were enabled in "Preferences for this project: MilkyWay@home Preferences" has been changed to hopefully be more clear
- After some testing, the single-threaded executable and multi-threaded executables running on one thread have very little difference in between them with the MT executable even being slightly faster in most cases
- MilkyWay N-Body Orbit Fitting Application executable has been changed to version 1.87, but the executable itself is exactly the same. In order to eliminate the mix of ST and MT executables that people were receiving, the new version of the executables have been set up so that all four are multi-threaded although two are labeled at single-threaded (one for Windows and one for Linux). From testing, when I set the max number of threads for each task to "1", my BOINC client crunched the tasks on one core successfully. When I set the max number of threads for each task to anything above "1", it crunched task at the max number I had set or when set to "No Limit", ran on the max number of threads for my computer.
- Default for "Max # of simultaneous MilkyWay@home tasks" is set to "10"
- Default for "Max # of threads for each MilkyWay@home task" is set to "16"

I hope this fixes all the issues, allows people to crunch WUs on one thread and makes it easier for users to change those settings.

Thank you,
Kevin
4) Message boards : Number crunching : No Milkyway@home N-Body Simulation Tasks (Message 77079)
Posted 10 days ago by Profile Kevin Roux
Post:
Is there a source code available for the orbit fitting version of the nbody tasks? I would like to try it out on some ARM devices like Raspberry Pi 5 or something similar :)


https://github.com/Milkyway-at-home/milkywayathome_client
Version 1.86 is the version being used for the Orbit Fitting application.
5) Message boards : Number crunching : No Milkyway@home N-Body Simulation Tasks (Message 77078)
Posted 10 days ago by Profile Kevin Roux
Post:
Currently there are only "Milkyway@home N-Body Simulation with Orbit Fitting tasks" available, which is basically a newer version of the N-Body application. Simply enable both, they use about same amount of memory and same amount of threads, so you shouldn't run into any issues, you might however need to update your app_config.xml if that's what you are using to limit the number of cores per task.


I hope they bring back the regular N-Body Simulation tasks, I'm almost to a milestone and would hate to miss it.


There will be more tasks coming for N-body for Palomar 5. Not exactly sure what the timeline will be on that but probably sometime this summer.
6) Message boards : News : Admin Updates (Message 77059)
Posted 13 days ago by Profile Kevin Roux
Post:
Hello everyone,

Update
- Choosing the max number of jobs and the max number of CPUs has been added to the "Preferences for this project" page
- Selecting "1" for the max number of CPUs should make the BOINC client download the single threaded version of the binary for those tasks

Please let me know if you encounter any issues with these and if the single threaded binary is not downloading for you. I was able to get the single threaded binary downloaded in testing so I am hoping there is no issues there.

Working on
- GFLOPs estimate fix is almost done and will be implemented shortly after some testing
- Still looking into the low credit issued for some tasks
- Will look into the difference in instructions between the Linux and Windows executable

Thanks,
Kevin
7) Message boards : Number crunching : Why èarn some WUs a very low credit? (Message 77034)
Posted 20 days ago by Profile Kevin Roux
Post:
About 70% of my results look like this:

run time | CPU time | credits
223.89   | 1,807.51 | 28.25


But the other 30% look like this:
run time | CPU time | credits
224.09   | 1,863.43 | 1.41


Why are there so many results with such low credits?
This happens on 2 different PCs.


Could you give me the task ids or workunit ids?
8) Message boards : Number crunching : Unable to get MW tasks using TSC computers (Message 77032)
Posted 20 days ago by Profile Kevin Roux
Post:
I am unable to get any Milkyway project tasks when using single core CPU computers from The Science Cloud.

Please fix the blockage.


Are you getting an error message or is it just not getting tasks?
If just not getting tasks, then it might be because the binary we use is for multicore computing.
It is on the lists of things to do to get an option for single-core in computing preferences.
9) Message boards : News : Admin Updates (Message 77030)
Posted 20 days ago by Profile Kevin Roux
Post:
Hello everyone,

The person in charge of the new runs has been notified that they are erroring out and will be working to fix these ASAP.

Thanks,
Kevin
10) Message boards : Number crunching : bad argument #0 to 'calculateEps2' (Expected 3 or 6 arguments) (Message 77028)
Posted 20 days ago by Profile Kevin Roux
Post:
Sorry for the bad tasks. I have notified the person in charge of these tasks and they should fix this issue soon.
11) Message boards : News : Admin Updates Discussion (Message 76998)
Posted 23 days ago by Profile Kevin Roux
Post:
Kevin Roux wrote:
Working on
- Will look into getting number of CPUs used as an option in Preferences
When looking into it, perhaps you can also check if it's possible to send the single thread application in case someone chooses to run Milkyway on a single core. I have not tested it, but probably it will run faster than the MT application forced to run on a single core. At least in theory it should. I mean, you compiled a single core version, it's there, there's just no way to get it automatically from the server. Or maybe a selection between the ST app and the MT app could be a simple way to get at least some options in case making it possible to select any number of cores needs too much time.


Thank you for the information. I wasn't sure if this was something people wanted but will look into implementing that was well when I work on implementing choosing the number of cores more easily.
12) Message boards : News : Admin Updates Discussion (Message 76997)
Posted 23 days ago by Profile Kevin Roux
Post:
i assume there are still no plans as of today to support the Apple silicon arm architecture ?


It is something I have planned for the summer when I get a MacBook so I can build/test the binary for Apple support.
These are not solid plans however. There are always things that come up that might have to take priority.
13) Message boards : Number crunching : de_nbody_orbit_fitting (Message 76975)
Posted 22 Mar 2024 by Profile Kevin Roux
Post:
And what does "OCS" mean in the job name?


Orphan-Chenab Stream
14) Message boards : News : Admin Updates (Message 76970)
Posted 15 Mar 2024 by Profile Kevin Roux
Post:
Hello everyone,

Update
- We now have 3 runs in the Orbit Fitting application

Working on
- Still working on the GFLOPS issue
- Will look into getting number of CPUs used as an option in Preferences

Best,
Kevin
15) Message boards : News : Admin Updates Discussion (Message 76969)
Posted 10 Mar 2024 by Profile Kevin Roux
Post:
@Kevin: will the new N-Body Simulation with Orbit Fitting replace the old N-Body Simulation? As far as I see in the results it's calculating <search_likelihood>, <search_likelihood_EMD>, <search_likelihood_Mass> and <search_likelihood_Beta> like the old app did and adds on top of that <search_likelihood_BetaAvg>, <search_likelihood_VelAvg> and <search_likelihood_Dist>. So the old app does not seem necessary unless it's working on completely different data.


The new app is running the newest version of our n-body code. We want to fit the orbit of the Orphan-Chenab Stream that a past grad student had optimized using MW@home before. The old app currently has no active runs but still has all those workunits that need to be crunch. The old application is running a completely different set of data as it is fitting Palomar 5. There will be future runs that will not be fitting orbits but looking at the affects of self-interacting dark matter on streams. The reason we made a new application is because the new code had changes to the way it calculates likelihood scores so it would be unable to validate the current runs on the old application. Making the new application was just the easiest way to get new runs up without affecting the old ones and making sure those workunits that needed validation would get validated.
16) Message boards : News : Admin Updates (Message 76943)
Posted 27 Feb 2024 by Profile Kevin Roux
Post:
Hello everyone,

Announcement
I will be doing some server maintenance on 28 Feb 2024 at 15:00 UTC. The server should only be down for a couple of hours.
I will also be putting up new runs under a new application called Milky Way N-Body Orbit Fitting.

Update
- Fixed error causing warning messages to appear on people's profiles and on the Message Boards
- Removed the quotation mark that was appearing at the top of the home page

Working on
- GFLOPS error
- Cause of runaway WU generation

Thank you,
Kevin
17) Message boards : Number crunching : GFLOPS backwards (Message 76941)
Posted 26 Feb 2024 by Profile Kevin Roux
Post:
I will put it on the list of things to look at this week.
18) Message boards : News : Admin Updates (Message 76937)
Posted 21 Feb 2024 by Profile Kevin Roux
Post:
Hello everyone,

I am working on getting a new version of our code up on the server.
This new version will allow us to fit orbits on top of the other parameters we have already been fitting.
There seems to be a slight issue right now with downloading the new version and I am working on fixing the issue.

Thank you,
Kevin


Update
Download error has been fixed but the error with the new version persists.
Working to get the new version working and getting new runs that have orbit fitting up on the server.
19) Message boards : News : Admin Updates (Message 76936)
Posted 21 Feb 2024 by Profile Kevin Roux
Post:
Hello everyone,

I am working on getting a new version of our code up on the server.
This new version will allow us to fit orbits on top of the other parameters we have already been fitting.
There seems to be a slight issue right now with downloading the new version and I am working on fixing the issue.

Thank you,
Kevin
20) Message boards : News : Admin Updates (Message 76876)
Posted 5 Feb 2024 by Profile Kevin Roux
Post:
Hello everyone,

Update
- Removed old separation tasks for some users
- Updated the GPU requirement thread title and unpinned the GPU threads

Working on
- giving tasks needed for validation priority so credit can be given out faster
- finishing testing on new binary with orbit fitting
- fixing the cause for runaway task generation

Thank you,
Kevin


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