Welcome to MilkyWay@home

More New N-Body Runs


Advanced search

Message boards : News : More New N-Body Runs
Message board moderation

To post messages, you must log in.

AuthorMessage
Jake Bauer
Project developer
Project tester
Project scientist

Send message
Joined: 20 Aug 12
Posts: 66
Credit: 406,916
RAC: 0
100 thousand credit badge6 year member badge
Message 61270 - Posted: 28 Feb 2014, 21:07:03 UTC

I have started:

de_nbody_02_28_orphan_real_0
ps_nbody_02_28_orphan_real_0


de_nbody_02_28_orphan_real_1
ps_nbody_02_28_orphan_real_1

de_nbody_02_28_orphan_real_2
ps_nbody_02_28_orphan_real_2
ID: 61270 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
[TA]Assimilator1
Avatar

Send message
Joined: 22 Jan 11
Posts: 357
Credit: 42,228,692
RAC: 1
30 million credit badge8 year member badgeextraordinary contributions badge
Message 61282 - Posted: 1 Mar 2014, 16:16:06 UTC

OK, btw what's different about these WUs/simulations to others?

And nbody means CPU WUs only?
Team AnandTech - SETI@H, Muon1 DPAD, F@H, MW@H, A@H, LHC@H, POGS, R@H, Einstein@H, DHEP.

Main rig - i7 4930k @4.1 GHz, RX 580 8 GB, 16 GB DDR3 1866, Win 7 64bit
2nd rig - Q9550 @3.6 GHz, HD 7870 XT 3GB(DS), 8 GB DDR2 1066, Win 7 64bit
ID: 61282 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Jake Bauer
Project developer
Project tester
Project scientist

Send message
Joined: 20 Aug 12
Posts: 66
Credit: 406,916
RAC: 0
100 thousand credit badge6 year member badge
Message 61292 - Posted: 1 Mar 2014, 20:38:52 UTC - in response to Message 61282.  
Last modified: 1 Mar 2014, 20:39:00 UTC

MilkyWay@Home runs 2 applications:

Separation tries to pull out structures called "stellar streams" from a background (see astrophysics section of the website) by running a complicated probability calculation. Separation is an older project and has since acquired a GPU version to supplement the CPU calculations.

N-body is tasked with the problem of replicating the creation of stellar streams from collisions in an arbitrary Galactic gravitational potential (basically a measure of how strong the gravity of the Milky Way is at any point and space, and in principle, time as well). What you guys are doing is running a single n-body simulation and telling us what the likelihood of your simulation fitting the observed data. In principle, this will eventually tell us where dark matter is in the Milky Way system. This is a newer application and only runs on CPUs at present, although this has potential to change in the near future.

I hope this helps!

Jake
ID: 61292 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
L

Send message
Joined: 1 Oct 13
Posts: 2
Credit: 1,635,132
RAC: 0
1 million credit badge5 year member badge
Message 61303 - Posted: 2 Mar 2014, 12:55:50 UTC
Last modified: 2 Mar 2014, 13:09:40 UTC

Please mark assignments for N-body as burdening N-1 (and possibly N-2, or even N*3/4) CPU cores. Now it turns out the situation in which the equipment (4CPU + HT = 8CPU) is not fully loaded, that is not correct :(
ID: 61303 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
[TA]Assimilator1
Avatar

Send message
Joined: 22 Jan 11
Posts: 357
Credit: 42,228,692
RAC: 1
30 million credit badge8 year member badgeextraordinary contributions badge
Message 61305 - Posted: 2 Mar 2014, 13:57:29 UTC - in response to Message 61292.  
Last modified: 2 Mar 2014, 14:28:34 UTC

MilkyWay@Home runs 2 applications:

Separation tries to pull out structures called "stellar streams" from a background (see astrophysics section of the website) by running a complicated probability calculation. Separation is an older project and has since acquired a GPU version to supplement the CPU calculations.

N-body is tasked with the problem of replicating the creation of stellar streams from collisions in an arbitrary Galactic gravitational potential (basically a measure of how strong the gravity of the Milky Way is at any point and space, and in principle, time as well). What you guys are doing is running a single n-body simulation and telling us what the likelihood of your simulation fitting the observed data. In principle, this will eventually tell us where dark matter is in the Milky Way system. This is a newer application and only runs on CPUs at present, although this has potential to change in the near future.

I hope this helps!

Jake

Yea it does, thx :)

What's the difference between de & ps, & real 0-2?
Team AnandTech - SETI@H, Muon1 DPAD, F@H, MW@H, A@H, LHC@H, POGS, R@H, Einstein@H, DHEP.

Main rig - i7 4930k @4.1 GHz, RX 580 8 GB, 16 GB DDR3 1866, Win 7 64bit
2nd rig - Q9550 @3.6 GHz, HD 7870 XT 3GB(DS), 8 GB DDR2 1066, Win 7 64bit
ID: 61305 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
L

Send message
Joined: 1 Oct 13
Posts: 2
Credit: 1,635,132
RAC: 0
1 million credit badge5 year member badge
Message 61312 - Posted: 3 Mar 2014, 14:26:27 UTC - in response to Message 61303.  
Last modified: 3 Mar 2014, 14:31:23 UTC

p.s:
(4CPU + HT = 8CPU) is not fully loaded, that is not correct :(


Loading kept within 60-70%, so the mind just to make corrections N*3/4 (for N-body) that would provide full system load.

This problem I have seen in other multi-core systems with the first appearance of multi-threaded applications in MilkyWay@Home. Waiting for corrections load CPU, or complete transfer of such applications on the GPU.
ID: 61312 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote

Message boards : News : More New N-Body Runs

©2019 Astroinformatics Group