Background priority on Windows Vista and later?

Message boards : Number crunching : Background priority on Windows Vista and later?

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lx45803

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Message 76301 - Posted: 20 Dec 2013, 4:22:10 UTC

Hey devs, would it be possible for you to modify Rosetta to use the background priority on Windows Vista and later? I ask because I run Rosetta on 7 of my 8 cores, which consumes around 3.3 GB of memory. I only have 8 GB total, which isn't enough for Chrome, Planetside 2, and Rosetta all at once. As such, I set PS2 as an exclusive application so that Rosetta gets suspended when I launch the game. This all works great.

The problem comes in when I exit the game. BOINC sees the game close, and starts all 7 Rosetta processes back up. At the same time. My hard drive is kinda slow, and each instance of Rosetta needs to read a lot of data from disk on startup. This makes my computer almost unusable for 2-3 minutes as whatever I'm doing has to contend with 7 other processes, each with a mile-long list of files to be read.

If Rosetta used Background priority, all other disk IO would be prioritized over it, solving my problem, and probably that of at least a few other people as well. What do you guys think?
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Profile dcdc

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Message 76302 - Posted: 21 Dec 2013, 13:34:52 UTC

I hadn't heard of the "background priority" before, so thanks for that :) For anyone else who hasn't, it's the same as Idle, but considers the priority of memory and disk activity as well as the CPU:

http://betanews.com/2012/02/17/process-explorer-15-13-adds-background-priority-setting/

It seems sensible to me - can you assign the threads that priority manually for now? Using one of these programs perhaps?: http://superuser.com/questions/65108/setting-process-priority-everytime-it-is-launched I guess BOINC needs to stay at a higher priority which makes things slightly less straight-forward.

Also, you might see a benefit from using a USB flash drive as ReadyBoost. I know internet wisdom generally suggests it makes no difference unless you're RAM-constrained, but as it helps with speeding cached reads so might help in your situation.

Danny
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lx45803

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Message 76303 - Posted: 21 Dec 2013, 22:42:16 UTC

Yes, I can manually assign the background priority manually, using Process Explorer, or just assign the priority to boinc.exe and let the new Rosetta processes inherit it since Boinc doesn't really need a higher priority than the tasks it runs. But if possible, I'd like to see this behavior built into the program by the devs as the default behavior.

Unfortunately, I don't have any flash drives fast enough for ReadyBoost. But in a way, you're right; I am RAM constrained. It's not uncommon for PS2 to eat huge gobs of memory due to the nature of the game, and I regularly see my system running at >7.5 GB of memory usage. This doesn't leave much room for the filesystem cache, which is exactly the problem ReadyBoost was designed to alleviate. If anyone else is in a similar situation and is encountering the same problems, I'd certainly recommend looking into ReadyBoost if just buying more RAM isn't an option.
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Mod.Sense
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Message 76304 - Posted: 22 Dec 2013, 0:12:06 UTC

The task priorities are actually established by BOINC Manager. So your request should be directed to the Berkeley BOINC newsgroup or message boards.
Rosetta Moderator: Mod.Sense
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Message boards : Number crunching : Background priority on Windows Vista and later?



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