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Posts by DJStarfox

1) Message boards : News : New Poll Regarding GPU Application of N-Body (Message 70990)
Posted 21 Jul 2021 by DJStarfox
When you say it's not much faster than a CPU, do you mean single-core CPU vs single GPU? Or do you mean an 8 or 12 thread CPU vs a 512 CUDA Core GPU? Because N-Body can scale itself to multiple threads, and I image the CPU also uses all CUDA cores on a GPU....
2) Message boards : Number crunching : ERR_RSC_LIMIT_EXCEEDED (Message 65077)
Posted 29 Aug 2016 by DJStarfox
About 1 out of 4 nBody WU are failing with this error. Any idea what's wrong?

My setup:
BOINC 6.10.45
Linux 2.6.32 x86_64
3) Message boards : Number crunching : differences between running 1,2,4,8 etc. work units simultaneously (Message 63153)
Posted 17 Feb 2015 by DJStarfox
See this thread. http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=2301

Edit: Oh wait, sorry. You're talking about GPU.... Link is for CPU above.
4) Message boards : News : New Version of Separation Modfit 1.34 (Message 62423)
Posted 29 Sep 2014 by DJStarfox
I'm still receiving the GLIBC version missing error with this new modified fit app.

So, looks like the compile for modified fit didn't work right....

The recent nBody app is working though.
5) Message boards : News : New Version of Separation Modfit 1.34 (Message 62367)
Posted 22 Sep 2014 by DJStarfox
Sounds great. I will test out the new version. In the meantime, the feeder is "not running", so i cannot get any work.
6) Message boards : News : New Version of Separation Modified Fit (1.32) (Message 62307)
Posted 10 Sep 2014 by DJStarfox
Thanks. I'm running Centos 6.5 x86_64 with glibc 2.12.

My developer skills are rusty at the moment, but I'll see if I can find time this weekend to compile the code.
7) Message boards : News : New Version of Separation Modified Fit (1.32) (Message 62302)
Posted 9 Sep 2014 by DJStarfox
Both the latest Modified Fit app and the N-Body app fail on every WU due to this error:
../../projects/milkyway.cs.rpi.edu_milkyway/milkyway_nbody_1.42_x86_64-pc-linux-gnu__mt: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ../../projects/milkyway.cs.rpi.edu_milkyway/milkyway_nbody_1.42_x86_64-pc-linux-gnu__mt)

Therefore, I can no longer run any Milkyway applications. :(

Sorry, but if you do not fix, I must detach from this project.
8) Message boards : News : Separation Modified Fit v1.28 Release (Message 60127)
Posted 8 Oct 2013 by DJStarfox
This application (like many before it) is accessing /home and being denied by SELinux. Please re-program your application to not access /home. Otherwise, it results in computation error.


This has happened since version 1.24:

And previously with nBody:
9) Message boards : News : Separation Modified Fit v1.24 (Message 59376)
Posted 16 Jul 2013 by DJStarfox
Any word on this at all?

I cannot run any modified fit tasks until this is fixed. I think statically linking the glibc version GLIBC_2.14 will fix it.
10) Message boards : News : N-Body 1.30 (Message 59321)
Posted 12 Jul 2013 by DJStarfox
If version 1.30 was just release, why is there a version 1.32 in the downloads folder? Should I use 1.32 or 1.30 for linux x86_64?

Edit: I use the app_info.xml anonymous platform for this project.
11) Message boards : News : Separation Modified Fit v1.24 (Message 59293)
Posted 9 Jul 2013 by DJStarfox
Linux localhost #1 SMP Wed Nov 23 13:07:52 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

Getting these errors with modified fit:
../../projects/milkyway.cs.rpi.edu_milkyway/milkyway_separation__modified_fit_1.24_x86_64-pc-linux-gnu: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ../../projects/milkyway.cs.rpi.edu_milkyway/milkyway_separation__modified_fit_1.24_x86_64-pc-linux-gnu)

12) Message boards : News : Separation Modified Fit v1.24 (Message 59292)
Posted 9 Jul 2013 by DJStarfox
This binary is accessing my /home folder again, and it's being denied by SELinux. This causes the task to crash.

This was a problem before with the regular separation binaries, but you had fixed it there. Guess you should compare source code or something.
13) Message boards : News : nbody fpops calculation updated (Message 59229)
Posted 5 Jul 2013 by DJStarfox
Does this explain why I was given so much credit for a few workunits earlier? I posted about it, but no one has shed any light on the observation.

NOTE: All those WU have been deleted from the server. However, if you look at my credit, you'll see my MW credits more than doubled in 1 day. This was due to completing a single WU.

Edit: I'm also reading about credit system problems from June. Perhaps something is going on with the credit system?
14) Message boards : News : Separation Modified Fit Release (Message 58944)
Posted 18 Jun 2013 by DJStarfox
In the project preferences, there are two separation applications! How do we know which is which?

You could just do what malariacontrol.net does. They have applications alongside "beta" applications (with same name, just plus "beta"). Users can run either or both alongside the regular app.
15) Message boards : Number crunching : How do I limit the number of cores running the simulation (mt) units to 4? (Message 58903)
Posted 15 Jun 2013 by DJStarfox
To start, see this thread for a sample app_info.xml file to create.

Not sure on the GPU limits. You could research how to modify the app_info.xml file to do what you want from this link. I believe the parameter you're looking for is "coproc".
16) Message boards : Number crunching : Excessive Credit (Message 58889)
Posted 15 Jun 2013 by DJStarfox
I'm getting excessive credit since the new version of nBody 1.18 starting running. For example, this WU gave me 37741 credits; normally it's 350 or so.


Running BOINC 6.10.58.
17) Message boards : News : N-Body 1.08 (Message 57789)
Posted 3 Apr 2013 by DJStarfox
Thank you Jeff. I will download some workunits tonight and let you know if there's any problem.
18) Message boards : News : N-Body 1.08 (Message 57626)
Posted 23 Mar 2013 by DJStarfox
I agree. Statically link it, or I'm not going to be able to run the latest n-body application.
19) Message boards : News : N-Body 1.08 (Message 57607)
Posted 22 Mar 2013 by DJStarfox
I'm getting SELINUX errors because the nbody application is trying to access /home. No, I will not disable SELINUX. Your application should not access my filesystem outside its working directory.

The real problem is that it says it requires GLIB 2.14. I have libc.so.6, but I guess it's not the right version.

./milkyway_nbody_1.08_x86_64-pc-linux-gnu__mt: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./milkyway_nbody_1.08_x86_64-pc-linux-gnu__mt)
linux-vdso.so.1 => (0x00007fff693ff000)
librt.so.1 => /lib64/librt.so.1 (0x0000003315200000)
libm.so.6 => /lib64/libm.so.6 (0x0000003088400000)
libgomp.so.1 => /usr/lib64/libgomp.so.1 (0x000000326d800000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003315e00000)
libc.so.6 => /lib64/libc.so.6 (0x0000003087800000)
/lib64/ld-linux-x86-64.so.2 (0x0000003087400000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003088800000)
20) Message boards : Number crunching : nbody compute failures (Message 55384)
Posted 18 Aug 2012 by DJStarfox
BOINC 6.10.58, Linux 2.6.35 x86_64, milkyway_nbody_0.88_x86_64-pc-linux-gnu__mt

All NBody tasks fail with this error. What is going on?

Error loading Lua script 'nbody_parameters.lua': 
 [string "#---~/Research/milkywayathome_client/bin/milkyway_nbody -f ./pl..."]:1: unexpected symbol near '#' 
Failed to read input parameters file

News from Jul 29 said this should be fixed...

Example failed task:

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