Searching for pulsars in PALFA data from Arecibo

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Bruce Allen
Bruce Allen
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Topic 194085

We are starting some limited public testing of a new pulsar search on Einstein@Home. This search uses data from the PALFA collaboration, taken at the Arecibo radio observatory. Science information will be available in this thread in the Science Message Board area.

Please use this thread (which is in the Problems and Bug Reports Messsage Board area) to report bugs and problems with this new search. This is especially useful during our initial public testing!

Bruce Allen

Ageless
Ageless
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Searching for pulsars in PALFA data from Arecibo

How do we recognize these tasks? Do they have a different name or different application?

Jord

Pooh Bear 27
Pooh Bear 27
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Will they download if running

Will they download if running the optimized apps, or do we have to remove the app_info and run standard?

Chris S_2
Chris S
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If we want to take part, can

If we want to take part, can we please have instructions on how to do so.

Waiting for Godot & salvation :-)

Why do doctors have to practice?
You'd think they'd have got it right by now

Bernd Machenschalk
Bernd Machenschalk
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There is no need for you to

There is no need for you to do anything, the tasks will be issued randomly between the usual "HierarchicalSearch" tasks. The number of tasks will be very limited during the testing phase (628 workunits at a time), it is rather unlikely you get one. The name of the application will be "einsteinbinary_ABP1" instead of the current "einstein_S5R4". You will be able to opt-out from the "Arecibo binary pulsar search" in your Einstein@home preferences (once the App is in the database, which will be some time tomorrow afternoon CET). Users currently running the Windows Beta App will not automatically get ABP1 tasks, I'll publish instructions and a new app_info.xml in the Beta App thread in the next days. For various technical reasons the ABP1 App will not be available for Mac OS X on PowerPC.

BM

BM

Klimax
Klimax
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It would be good idea to put

It would be good idea to put info at server-status about how many WU is present in the system.

Bikeman _Heinz-Bernd Eggenstein_
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RE: It would be good idea

Message 89031 in response to message 89030

Quote:
It would be good idea to put info at server-status about how many WU is present in the system.

There sure will be once this goes into production, but with the test set of just a few hundred units, it will be more like now-you-see-them,now-you-don't.

CU
Bikeman

Bernd Machenschalk
Bernd Machenschalk
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The first 628 "ABP1"

The first 628 "ABP1" workunits are being produced right now and should be delivered in about 1h.

For this to happen our scheduler runs in a new "mixed" mode, which could break something for the normal operation (S5R4 workunits), too. We did our best to test this, but haven't done this before on the scale of the whole project.

On a machine that needs about 9h10m for a S5R4 task a ABP1 task ran 6h12m.

BM

BM

Bruce Allen
Bruce Allen
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RE: It would be good idea

Message 89033 in response to message 89030

Quote:
It would be good idea to put info at server-status about how many WU is present in the system.

That's a good idea. We'll modify the server status page to show this.

Klimax
Klimax
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RE: RE: It would be good

Message 89034 in response to message 89033

Quote:
Quote:
It would be good idea to put info at server-status about how many WU is present in the system.

That's a good idea. We'll modify the server status page to show this.

Thank you.

Bernd Machenschalk
Bernd Machenschalk
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Credit: 130314344
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Two issues are (now) known

Two issues are (now) known for this application:

1. On Windows 98/ME the communication between the worker and the screensaver isn't working, i.e. you'll see the starsphere, but not the data that's usually displayed. That's a common problem to all MinGW-built Windows Applications (i.e. S5R4 Beta Apps, too). We're working on this.

2. The App had a bug that occasionally lead to "general access violations" / "segfaults", preferably on Windows. The bug was in the part of the application that communicated with the screensaver, it didn't affect the scientific computation. This bug has been fixed and a new application version was published, Tasks that are resent because they errored out previously should be run with the new version of the application (minor version 02).

BM

BM

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