I/O, memory priority reduction of tasks
11 Dec 2011 12:11:37 UTC
Topic 196096
(moderation:
Got redirected here with this question:
In Windows there's also a Memory priority and I/O priority. I used an online guide to get those lowered for uTorrent process, and it seems the program become less noticeable when ran in the background.
Screenshot of BOINC spawned process and my adjusted uTorrent process
I just wanted to ask, what is a reason not to apply these low priorities to BOINC processes too?
I/O, memory priority reduction of tasks
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This is more a general BOINC question, not specific to Einstein@Home, right?
BM
BM
RE: This is more a general
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Ageless redirected the Question here from the Boinc Forum:
I/O, memory priority reduction of BOINC
Claggy
It's not "High priority" that
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It's not "High priority" that he's talking about, it's about the priority at which the application runs under the OS.
The Gamma-ray pulsar v0.23 that he's pointing at is your application. If it runs at Normal priority in Windows, it's your doing, as you compile the application to run at a certain priority. That isn't anything to do with BOINC, other than that BOINC may ask of the projects to use Low priority on CPU apps.
RE: It's not "High
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It's even more complicated than that. Under Windows, at least, the separate threads within an application can have different priorities:
Oliver hit a problem (BRP3/4) with those around this time last year (that's the before-fix version in the screenshot), and we sorted it out over boinc_dev.
From what Boomman says, it might be possible to extend the principle to I/O and memory priorities, as well as the threads we're already controlling. But given the amount of data which the Einstein apps have to process, I'm wondering whether lowering those priorities would mean the app takes too much of a performance hit. uTorrent, if I understand it right, would be limited to WAN speeds anyway, so doesn't need the sort of performance a scientific CPU or GPU app would need.
This document outlines new
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This document outlines new I/O priorities implemented in Vista.
One of the examples of program that would need I/O prioritization: