New GW search S6LV1

Bernd Machenschalk
Bernd Machenschalk
Moderator
Administrator
Joined: 15 Oct 04
Posts: 3,935
Credit: 198,769,599
RAC: 43,524
Topic 196212

The current GW search S6Bucket is coming to an end. We already started to generate all the remaining workunits and put these in the database.

As the remaining workunits are scattered over the whole frequency band, as usual our locality scheduling isn't very effective anymore, and the download volume for processing GW tasks increases. If you are on a slow (or expensive) internet connection, you may want to back off Einstein@Home for a few days.

Preparations for the next 'run' called S6LV1 (data from sixth LIGO science run, first run using 'line veto') are already finished, the first S6LV1 tasks should be shipped in just a few days. As this run uses the same data files, this should then lower the required download volume again.

BM

BM

Donald A. Tevault
Donald A. Tevault
Joined: 17 Feb 06
Posts: 439
Credit: 73,516,529
RAC: 0

New GW search S6LV1

I've noticed on the "Applications" page that there's no 64-bit Linux version of this app. Do you plan to add one, or do I need to install the 32-bit libraries on my machines that don't have them?

Donald A. Tevault
Donald A. Tevault
Joined: 17 Feb 06
Posts: 439
Credit: 73,516,529
RAC: 0

RE: I've noticed on the

Quote:
I've noticed on the "Applications" page that there's no 64-bit Linux version of this app. Do you plan to add one, or do I need to install the 32-bit libraries on my machines that don't have them?

Never mind. I'm installing 32-bit libraries now.

archae86
archae86
Joined: 6 Dec 05
Posts: 2,812
Credit: 3,213,088,201
RAC: 2,608,468

The two hosts for which I so

The two hosts for which I so far have finished S6LV1 both take longer to finish a task than on the previous GW work. Initial indications suggest 10% or a bit more extra time.

The hosts are both Windows XP Pro machines, one a dual-core Conroe, the other a quad of the Penryn generation.

Sunny129
Sunny129
Joined: 5 Dec 05
Posts: 162
Credit: 160,342,159
RAC: 0

i too am experiencing

i too am experiencing increased run times, although i'm seeing S6LV1 tasks taking anywhere from 5% to 32% longer than S6GC tasks. i'd say on average they're taking ~%18 longer to run. i to am running WinXP (32-bit though). of course my S6LV1 sample size is extremely small b/c the tasks have only been available for a few days now, so take my estimates with a grain of salt.

Bernd Machenschalk
Bernd Machenschalk
Moderator
Administrator
Joined: 15 Oct 04
Posts: 3,935
Credit: 198,769,599
RAC: 43,524

We have stopped generating

We have stopped generating S6LV1 workunits for now to investigate a 'scientific' problem in the app (the code apparently differs from the formula it should implement). We probably need to restart the run, most likely on Monday next week. It is still not clear whether we need a new application (version), or just need to change the command-line arguments to achieve the same effect. But in any case the timing behavior of the S6LV1 tasks will most likely be different after the restart.

BM

BM

Bernd Machenschalk
Bernd Machenschalk
Moderator
Administrator
Joined: 15 Oct 04
Posts: 3,935
Credit: 198,769,599
RAC: 43,524

The "locality scheduler", the

The "locality scheduler", the part of the scheduler that serves GW work (S6Bucket and S6LV1) was causing problems, so I turned it off (late Thursday) until I could analyze and fix this in the code. I did this today. Currently the workunit generator for the S6LV1 re-launch is initializing (which takes a few hours), the "locality scheduler" will be turned on again afterwards, later today or early tomorrow.

BM

BM

archae86
archae86
Joined: 6 Dec 05
Posts: 2,812
Credit: 3,213,088,201
RAC: 2,608,468

RE: in any case the timing

Quote:
in any case the timing behavior of the S6LV1 tasks will most likely be different after the restart.

Yes. My small initial sample of SL6V1B shows times materially shorter than SL6V1A on the same two hosts mentioned before, and not so far distinguishable from the previous S6BucketA recent work on those hosts.

Paul Sands
Paul Sands
Joined: 16 Feb 05
Posts: 6
Credit: 9,982,650
RAC: 0

All of these tasks are

All of these tasks are failing on my linux hosts. May be a permission error for this app other Einstein tasks are running fine on these hosts.

process exited with code 22 (0x16, -234)

execv: Permission denied

Bernd Machenschalk
Bernd Machenschalk
Moderator
Administrator
Joined: 15 Oct 04
Posts: 3,935
Credit: 198,769,599
RAC: 43,524

This seems to be an issue

This seems to be an issue with the new BOINC Core Client 7.0.20. We do see this on Macs, too. I'm in contact with BOINC Devs.

BM

BM

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.