Hi Cassidy, thanks for your reply! Yeah, priority by focus is a great idea. And so simple. Ingenious things are always simple :D I have a proof-of-concept implementation, but it conflicts with prioritizing apps by default with ulatencyd because it sets priority to higher-than-normal value on focus and resets it back to normal on unfocus, regardless of the previous priority of the process. Well, that can be fixed in theory, but the real problem is that it's not setuid-safe - shell scripts in Linux can't be setuid-safe, there's always an exploitable race condition, so I'll need somebody to rewrite it in C or Vala. Shouldn't be hard to implement with libwnck.
By the way, looks like ulatencyd implements something like that already. I'm fiddling with its configs right now, it's mostly for item #4 on the list (prioritizing apps by default) though. It has Xorg as one of data providers and decides priorities depending on all the data it collects, but in my experiments it considers several apps to be the current active app... weird. By the way, anybody familiar with Lua in here? That's what ulatencyd uses for decision-making code. Using ulatencyd I've already prevented app installation and system updates from gobbling up resources I need for foreground apps, gave screencasters higher priority so they don't drop frames that hard, increased priority for media apps, etc. Looks like we'll be able to ship it with proper configs in Luna (but no promises!). -- Sergey "Shnatsel" Davidoff
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