Weird host

Luigi R.
Luigi R.
Joined: 7 Feb 14
Posts: 2
Credit: 17,889,681
RAC: 0
Topic 198433

https://einsteinathome.org/host/12191867/tasks

0.00sec CPU time
962.17sec Run time to complete a workunit on FGRP4-SSE2... eeeeh?

Just curious. Is this ok?

Gary Roberts
Gary Roberts
Moderator
Joined: 9 Feb 05
Posts: 5,624
Credit: 89,040,215,496
RAC: 64,930,383

Weird host

If the results are valid, the project is happy to accept them.

As to why the crunch times seem fictitious, that's because they probably are. This doesn't affect the way this project works. If you drill down to the host details, it's a quite decent i5 running Linux. The recommended BOINC version for Linux is 7.2.42 and the most recent development version is 7.4.22. That host is running a version which identifies as 7.5.0. In other words, it's a version that may have been compiled outside the official BOINC system.

Since the source code is freely available, there's nothing to stop people modifying it for their own purposes and giving it whatever version number they want. BOINC doesn't do any science itself - it just provides the framework for the project apps to do their thing. Projects have systems in place to ensure that what is returned as a result is legitimate. I'm not at all suggesting there's anything suspicious about people who compile their own versions. There's lots of legitimate reasons.

The most likely reason for the very low elapsed time is that the task was stopped at some point close to completion and when it was restarted, the time counting started from scratch but the previous progress was able to be reloaded from the saved checkpoint. I've seen exactly this sort of behaviour with official BOINC versions, particularly after a crash of some sort. The 0.00 CPU time is probably an OS artifact. I used to see this a lot on earlier 32bit versions of the OS I run. I don't see it now with later 64bit versions.

Cheers,
Gary.

Sebastian M. Bobrecki
Sebastian M. Bo...
Joined: 20 Feb 05
Posts: 63
Credit: 1,529,568,217
RAC: 102

It looks like some time

It looks like some time accounting error. According to stderr of this task it was started at 06:55:20 and finished at 14:38:36. So it seams that it probably took about 7h and 43m.

Luigi R.
Luigi R.
Joined: 7 Feb 14
Posts: 2
Credit: 17,889,681
RAC: 0

Thank you for explanations.

Thank you for explanations. ;)

Comment viewing options

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