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World Community Grid Forums
Category: Completed Research
Forum: The Clean Energy Project - Phase 2 Forum
Thread: Strange visualizer |
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Thread Status: Active Total posts in this thread: 5
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Alexone
Cruncher Russia Joined: Dec 26, 2007 Post Count: 3 Status: Offline Project Badges: 
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Hello everybody
 Recently I saw strange picture of visializer. It was green.  I was surprised because a normal picture of visualizer is blue.  Anyone else seen something like that? And why it happened? Is this normal? |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Maybe the quantum calculation skipped right on by the photovoltaic effect and into photosynthesis? (He says, feebly...)
Most likely CPU and/or GPU processor time was temporarily hogged by "something", the thread doing screen painting was blocked, you see "green", cpu scheduler sez time for next thread, the thread writing to the display is unblocked, you see normal screen paint. I.e., not something I would worry excessively about as there are other processes running besides BOINC's "calculator processes" that can cause a thread to temporarily block particularly on Windows boxes (e.g., antivirus scans, backups if you have them scheduled, BOINC doing a file transfer, the dreaded Windows update, file indexing, your computer reporting in to the *NSA or the PRC's Ministry of State Security...) (*lollll...kidding. Probably.  ) |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
The calculation was feeling a bit seasick that day
 . No, what most likely happened here was that the so-called Fock matrix (which is visualized in the screensaver) has relatively uniformly non-zero off-diagonal elements, which are displayed in greenish. It basically means that the job has a ways to go till it finishes. The more the calculation progresses, the smaller these off-diagonal values become until they are all zero (color coded in blue) and the calculation is converged. Hope that clears everything up Best wishes Your Harvard CEP team |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Guess I should have included "When I have seen it, the progress indicator also stopped updating - and then suddenly Voilà! Progress indicator updating, everything back to normal colors."
Now I would conclude that there are multiple potential causes. |
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Alexone
Cruncher Russia Joined: Dec 26, 2007 Post Count: 3 Status: Offline Project Badges:
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Thank you for the explanation.
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