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Message-ID: <1444639687.3425.39.camel@gmail.com> Date: Mon, 12 Oct 2015 10:48:07 +0200 From: Mike Galbraith <umgwanakikbuti@...il.com> To: Peter Zijlstra <peterz@...radead.org> Cc: linux-kernel@...r.kernel.org, Yuyang Du <yuyang.du@...el.com> Subject: Re: 4.3 group scheduling regression On Mon, 2015-10-12 at 10:04 +0200, Peter Zijlstra wrote: > On Mon, Oct 12, 2015 at 09:44:57AM +0200, Mike Galbraith wrote: > > > It's odd to me that things look pretty much the same good/bad tree with > > hogs vs hogs or hogs vs tbench (with top anyway, just adding up times). > > Seems Xorg+mplayer more or less playing cross group ping-pong must be > > the BadThing trigger. > > Ohh, wait, Xorg and mplayer are _not_ in the same group? I was assuming > you had your entire user session in 1 (auto) group and was competing > against 8 manual cgroups. > > So how exactly are things configured? I turned autogroup on as to not have to muck about creating groups, so Xorg is in its per session group, and each konsole instance in its. I launched groups via testo (aka konsole) -e <content> in a little script to turn it loose at once to run for 100 seconds and kill itself, but that's not necessary 'course. Start 1 hog in 8 konsole tabs, and mplayer in the 9th, ickiness follows. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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