Messages in this thread | | | Subject | Re: [PATCH v4] Regression: sched: automated per session task groups | From | Mike Galbraith <> | Date | Sun, 05 Dec 2010 18:09:37 +0100 |
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On Sun, 2010-12-05 at 17:59 +0100, Mike Galbraith wrote: > On Sun, 2010-12-05 at 15:12 +0000, Alan Cox wrote: > > > > As soon as you do that from the same terminal that you're going to > > > > launch the "make" from, you're back to total lossage. Are you going > > > > to explain to a student that "oh, you need to create a new > > > > gnome-terminal tab and launch firefox from that"? > > > > > > Btw, most people don't do that anymore. They don't use terminals. They > > > > Its a regression for those who do - and often have good reason to do. > > This is of course why you don't put policy in the kernel and the original > > patch was bogus anyway. > > What is a very clear regression is a threaded app (say firefox) vs a > single threaded app, particularly on UP. The per thread scheduling > model wins hands down there, because the scheduler very heavily favors > the threaded application. Take that unfairness away, and you have an > undeniable regression. Yes, it's not black and white, never is.
P.S. You also have an obvious _progression_ from the perspective of the single threaded application, which may just as well be interactive.
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