On Wed, Nov 6, 2013 at 5:21 PM, drago01 <drago01@xxxxxxxxx> wrote:
The Kernel can't track which window is focused and which isn't.
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On Wed, Nov 6, 2013 at 4:18 PM, Elad Alfassa <elad@xxxxxxxxxxxxxxxxx> wrote:No that's the kernel's job not gnome-shell's. Besides raising the nice
> slightly off-topic to the main subject of this email, I was wondering:
> perhaps we should make gnome-shell automatically raise the nice and ionice
> values (ie. lower the priority) of unfocused windows, so that a focused
> window will always get priority for I/O and processor time (thus increasing
> the perceived performance of the system)
level of background processes does not gain you much if anything in
terms of perceived performance on todays multi core systems.
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nice value might not mean much on an i7 (unless you're doing a really heavy multi-thread compile in the background) but ionice does, because I/O is slow even with threading, and even on SSDs, when we have high I/O loads the system needs some way to prioritize which I/O is important and which isn't. If I copy some heavy files to an external hard drive and keep the progress window focused, I probably want it to be done ASAP. On the other hand, if I hide that window and continue to do other stuff, it probably means that the file transfer is less important now (hence unfocused).
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-Elad Alfassa.
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