From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> To: Peter Zijlstra <peterz@infradead.org> Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>, Mike Galbraith <efault@gmx.de>, Hans-Peter Jansen <hpj@urpla.net>, linux-kernel@vger.kernel.org, Lennart Poettering <mzxreary@0pointer.de>, Linus Torvalds <torvalds@linux-foundation.org>, david@lang.hm, Dhaval Giani <dhaval.giani@gmail.com>, Vivek Goyal <vgoyal@redhat.com>, Oleg Nesterov <oleg@redhat.com>, Markus Trippelsdorf <markus@trippelsdorf.de>, Ingo Molnar <mingo@elte.hu>, Balbir Singh <balbir@linux.vnet.ibm.com> Subject: Re: [RFC/RFT PATCH v3] sched: automated per tty task groups Date: Fri, 19 Nov 2010 08:20:37 -0500 [thread overview] Message-ID: <20101119132037.GA18589@Krystal> (raw) In-Reply-To: <1290171648.2109.1580.camel@laptop> * Peter Zijlstra (peterz@infradead.org) wrote: > On Fri, 2010-11-19 at 07:55 -0500, Mathieu Desnoyers wrote: [...] > > Yep, this looks like one of these perpetual throughput vs latency trade-offs. > > > Trade-off sure, throughput vs latency only in a specific use-case, its > more a feature vs cost thing, just like all them trace people want lower > cost tracing but want more features at the same time.. Yep, agreed for "feature vs cost", given that the kind of latency that is fixed in this case really boils down to a sluggish system under a relatively common workload -- so making this work might be called a "feature". ;) FWIW, about tracing, well, we should distinguish between features that add cost to the fast-path and slow-path only. But I really don't care anymore, since Ingo, Linus, Thomas and yourself made it very clear that you don't care. So let's not even start this discussion -- it's going nowhere. Thanks, Mathieu -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com
next prev parent reply other threads:[~2010-11-19 13:20 UTC|newest]
Thread overview: 264+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-19 9:16 [RFC/RFT PATCH] sched: automated per tty task groups Mike Galbraith
2010-10-19 9:26 ` Peter Zijlstra
2010-10-19 9:39 ` Mike Galbraith
2010-10-19 9:43 ` Peter Zijlstra
2010-10-19 9:46 ` Mike Galbraith
2010-10-21 7:55 ` Mike Galbraith
2010-10-21 10:28 ` Peter Zijlstra
2010-10-19 9:29 ` Peter Zijlstra
2010-10-19 9:42 ` Mike Galbraith
2010-10-19 11:29 ` Mike Galbraith
2010-10-19 11:56 ` Ingo Molnar
2010-10-19 13:12 ` Mike Galbraith
2010-10-19 15:28 ` Linus Torvalds
2010-10-19 18:13 ` Mike Galbraith
2010-10-19 18:53 ` Mike Galbraith
2010-10-20 2:56 ` Ingo Molnar
2010-10-21 8:11 ` Mike Galbraith
2010-10-21 8:31 ` Ingo Molnar
2010-10-21 8:39 ` Mike Galbraith
2010-10-21 8:48 ` Markus Trippelsdorf
2010-10-21 8:52 ` Mike Galbraith
[not found] ` <20101021115723.GA1587@arch.trippelsdorf.de>
2010-10-21 16:22 ` Mathieu Desnoyers
2010-10-21 10:51 ` Mathieu Desnoyers
2010-10-21 11:25 ` Peter Zijlstra
2010-10-21 16:29 ` Oleg Nesterov
2010-10-21 19:11 ` Mike Galbraith
2010-10-26 7:07 ` [RFC/RFT PATCH v3] " Mike Galbraith
2010-10-26 7:29 ` Mike Galbraith
2010-10-26 15:47 ` Linus Torvalds
2010-10-27 1:58 ` Mike Galbraith
2010-11-11 15:26 ` Mike Galbraith
2010-11-11 18:04 ` Ingo Molnar
2010-11-11 18:34 ` Linus Torvalds
2010-11-11 19:08 ` Mike Galbraith
2010-11-11 19:37 ` Linus Torvalds
2010-11-11 20:29 ` Oleg Nesterov
2010-11-11 19:15 ` Markus Trippelsdorf
2010-11-11 19:35 ` Mike Galbraith
2010-11-11 19:38 ` Markus Trippelsdorf
2010-11-11 19:58 ` Mike Galbraith
2010-11-11 20:27 ` Oleg Nesterov
2010-11-11 22:20 ` Mike Galbraith
2010-11-12 18:12 ` Oleg Nesterov
2010-11-13 11:42 ` Mike Galbraith
2010-11-14 17:19 ` Mike Galbraith
2010-11-14 17:49 ` Markus Trippelsdorf
2010-11-14 18:10 ` Mike Galbraith
2010-11-14 19:28 ` Linus Torvalds
2010-11-14 20:20 ` Linus Torvalds
2010-11-14 20:27 ` Markus Trippelsdorf
2010-11-14 20:48 ` Linus Torvalds
2010-11-14 23:43 ` Mike Galbraith
2010-11-15 0:15 ` Linus Torvalds
2010-11-15 0:26 ` Linus Torvalds
2010-11-15 1:13 ` Mike Galbraith
2010-11-15 3:12 ` Linus Torvalds
2010-11-15 14:00 ` Mike Galbraith
2010-11-15 8:57 ` Peter Zijlstra
2010-11-15 11:32 ` Mike Galbraith
2010-11-15 11:46 ` Mike Galbraith
2010-11-15 12:57 ` Oleg Nesterov
2010-11-15 21:25 ` Mike Galbraith
2010-11-15 22:48 ` Peter Zijlstra
2010-11-16 1:56 ` Vivek Goyal
2010-11-16 2:18 ` Linus Torvalds
2010-11-17 8:06 ` Balbir Singh
2010-11-16 14:02 ` Mike Galbraith
2010-11-16 14:11 ` Peter Zijlstra
2010-11-16 14:47 ` Dhaval Giani
2010-11-16 17:03 ` Lennart Poettering
2010-11-16 17:11 ` Linus Torvalds
2010-11-16 18:16 ` Lennart Poettering
2010-11-16 18:21 ` Peter Zijlstra
2010-11-16 18:33 ` Paul Menage
2010-11-16 18:55 ` david
2010-11-16 18:59 ` Peter Zijlstra
2010-11-16 19:09 ` Vivek Goyal
2010-11-16 19:13 ` Peter Zijlstra
2010-11-16 19:22 ` Vivek Goyal
2010-11-16 19:25 ` Peter Zijlstra
2010-11-16 19:40 ` Vivek Goyal
2010-11-16 19:43 ` Peter Zijlstra
2010-11-16 19:49 ` Linus Torvalds
2010-11-16 19:35 ` Linus Torvalds
2010-11-16 20:03 ` Lennart Poettering
2010-11-16 20:12 ` Peter Zijlstra
2010-11-16 18:49 ` Linus Torvalds
2010-11-16 19:03 ` Pekka Enberg
2010-11-16 20:21 ` Kay Sievers
2010-11-16 20:35 ` Linus Torvalds
2010-11-16 20:31 ` Lennart Poettering
2010-11-17 13:21 ` Stephen Clark
2010-11-16 19:08 ` david
2010-11-16 20:33 ` Lennart Poettering
2010-11-16 20:38 ` Linus Torvalds
2010-11-16 21:14 ` Lennart Poettering
2010-11-17 13:23 ` Stephen Clark
2010-11-18 22:33 ` Hans-Peter Jansen
2010-11-18 23:12 ` Samuel Thibault
2010-11-18 23:35 ` Mike Galbraith
2010-11-18 23:43 ` Samuel Thibault
2010-11-18 23:51 ` Linus Torvalds
2010-11-19 0:02 ` Samuel Thibault
2010-11-19 0:07 ` Samuel Thibault
2010-11-19 11:57 ` Peter Zijlstra
2010-11-19 14:24 ` Samuel Thibault
2010-11-19 14:43 ` Peter Zijlstra
2010-11-19 14:55 ` Samuel Thibault
2010-11-19 0:42 ` Linus Torvalds
2010-11-19 0:59 ` Samuel Thibault
2010-11-19 1:11 ` Linus Torvalds
2010-11-19 1:12 ` Mike Galbraith
2010-11-19 1:23 ` Samuel Thibault
2010-11-19 2:28 ` Mike Galbraith
2010-11-19 9:02 ` Samuel Thibault
2010-11-19 11:49 ` Peter Zijlstra
2010-11-19 12:19 ` Peter Zijlstra
2010-11-19 12:55 ` Mathieu Desnoyers
2010-11-19 13:00 ` Peter Zijlstra
2010-11-19 13:20 ` Mathieu Desnoyers [this message]
2010-11-19 12:31 ` Paul Menage
2010-11-19 12:51 ` Peter Zijlstra
2010-11-19 13:03 ` Mike Galbraith
2010-11-19 12:38 ` Mike Galbraith
2010-11-22 6:22 ` Balbir Singh
2010-11-18 23:29 ` Mike Galbraith
2010-11-16 20:44 ` Pekka Enberg
2010-11-16 19:27 ` Dhaval Giani
2010-11-16 19:42 ` Diego Calleja
2010-11-16 19:45 ` Linus Torvalds
2010-11-16 19:56 ` Paul Menage
2010-11-16 20:17 ` Vivek Goyal
2010-11-16 20:50 ` Lennart Poettering
2010-11-20 22:16 ` Mika Laitio
2010-11-21 0:19 ` Mike Galbraith
2010-11-16 20:28 ` Lennart Poettering
2010-11-16 20:46 ` David Miller
2010-11-16 21:08 ` Lennart Poettering
2010-11-16 21:14 ` David Miller
2010-11-16 20:52 ` Alan Cox
2010-11-16 21:08 ` Linus Torvalds
2010-11-16 21:19 ` Lennart Poettering
2010-11-16 23:39 ` Ted Ts'o
2010-11-17 0:21 ` Lennart Poettering
2010-11-17 2:06 ` Ted Ts'o
2010-11-17 14:57 ` Vivek Goyal
2010-11-17 15:01 ` Lennart Poettering
2010-11-17 17:16 ` John Stoffel
2010-11-19 5:20 ` Andev
2010-11-19 11:59 ` Peter Zijlstra
2010-11-19 13:03 ` Ben Gamari
2010-11-19 13:07 ` Theodore Tso
2010-11-19 16:29 ` David Miller
2010-11-19 16:34 ` Lennart Poettering
2010-11-19 16:43 ` David Miller
2010-11-19 17:51 ` Linus Torvalds
2010-11-19 19:12 ` Ben Gamari
2010-11-19 19:48 ` Linus Torvalds
2010-11-20 1:33 ` Lennart Poettering
2010-11-19 20:38 ` Paul Menage
2010-11-20 1:13 ` Lennart Poettering
2010-11-20 4:25 ` Balbir Singh
2010-11-20 15:41 ` Lennart Poettering
2010-11-22 6:24 ` Balbir Singh
2010-11-22 19:21 ` Lennart Poettering
2010-11-19 19:31 ` Mike Galbraith
2010-11-19 13:21 ` Peter Zijlstra
2010-11-17 22:34 ` Lennart Poettering
2010-11-17 22:37 ` Peter Zijlstra
2010-11-17 22:45 ` Lennart Poettering
2010-11-17 22:52 ` Peter Zijlstra
2010-11-18 15:00 ` Stephen Clark
2010-11-17 23:49 ` Lennart Poettering
2010-11-16 21:17 ` Lennart Poettering
2010-11-17 20:59 ` James Cloos
2010-11-22 6:16 ` Balbir Singh
2010-11-16 18:57 ` Stephen Clark
2010-11-16 19:12 ` Vivek Goyal
2010-11-16 19:57 ` Mike Galbraith
2010-11-16 20:36 ` Lennart Poettering
2010-11-16 19:42 ` Markus Trippelsdorf
2010-11-16 18:08 ` Peter Zijlstra
2010-11-16 18:56 ` Stephen Clark
2010-11-16 20:05 ` Lennart Poettering
2010-11-16 20:15 ` Peter Zijlstra
2010-11-19 0:35 ` H. Peter Anvin
2010-11-19 0:42 ` Samuel Thibault
2010-11-19 3:15 ` Mathieu Desnoyers
[not found] ` <20101120090955.GB12043@balbir.in.ibm.com>
2010-11-20 19:47 ` Mike Galbraith
2010-11-16 13:04 ` Oleg Nesterov
2010-11-16 14:18 ` Mike Galbraith
2010-11-16 15:03 ` Oleg Nesterov
2010-11-16 15:41 ` Mike Galbraith
2010-11-16 17:28 ` Ingo Molnar
2010-11-16 17:42 ` Mike Galbraith
2010-11-20 19:35 ` [PATCH v4] sched: automated per session " Mike Galbraith
2010-11-30 15:39 ` [tip:sched/core] sched: Add 'autogroup' scheduling feature: " tip-bot for Mike Galbraith
2010-12-15 17:50 ` Oleg Nesterov
2010-12-16 7:53 ` Mike Galbraith
2010-12-16 14:09 ` Mike Galbraith
2010-12-16 15:07 ` Oleg Nesterov
2011-01-04 14:18 ` [tip:sched/core] sched, autogroup: Fix potential access to freed memory tip-bot for Mike Galbraith
2010-12-20 13:08 ` [tip:sched/core] sched: Add 'autogroup' scheduling feature: automated per session task groups Bharata B Rao
2010-12-20 13:19 ` Peter Zijlstra
2010-12-20 15:46 ` Bharata B Rao
2010-12-20 15:53 ` Bharata B Rao
2010-12-21 8:33 ` Peter Zijlstra
2010-12-20 16:39 ` Mike Galbraith
2010-12-21 5:04 ` Bharata B Rao
2010-12-21 5:50 ` Mike Galbraith
2010-12-04 17:39 ` [PATCH v4] sched: " Colin Walters
2010-12-04 18:33 ` Linus Torvalds
2010-12-04 20:01 ` Colin Walters
2010-12-04 22:39 ` Linus Torvalds
2010-12-04 23:43 ` Colin Walters
2010-12-05 0:31 ` Linus Torvalds
2010-12-05 7:47 ` Ray Lee
2010-12-05 19:22 ` Colin Walters
2010-12-05 20:47 ` Linus Torvalds
2010-12-05 22:47 ` Colin Walters
2010-12-05 22:58 ` Jesper Juhl
2010-12-05 23:05 ` Jesper Juhl
2010-12-07 18:51 ` Peter Zijlstra
2010-12-05 10:18 ` Con Kolivas
2010-12-05 11:36 ` Mike Galbraith
2010-12-05 20:58 ` Ingo Molnar
2010-12-04 23:31 ` david
2010-12-05 11:11 ` Nikos Chantziaras
2010-12-05 15:12 ` [PATCH v4] Regression: " Alan Cox
2010-12-05 16:16 ` Florian Mickler
2010-12-05 19:48 ` Alan Cox
2010-12-06 16:03 ` Florian Mickler
2010-12-05 16:59 ` Mike Galbraith
2010-12-05 17:09 ` Mike Galbraith
2010-12-05 17:15 ` Mike Galbraith
2010-12-06 0:28 ` [PATCH v4] " Valdis.Kletnieks
2010-11-16 14:01 ` [RFC/RFT PATCH v3] sched: automated per tty " Peter Zijlstra
2010-11-16 14:19 ` Mike Galbraith
2010-11-17 1:31 ` Kyle McMartin
2010-11-17 1:50 ` Linus Torvalds
2010-11-17 1:56 ` Kyle McMartin
2010-11-17 2:14 ` Mike Galbraith
2010-11-15 0:02 ` Mike Galbraith
2010-11-15 22:41 ` Valdis.Kletnieks
2010-11-15 23:25 ` Linus Torvalds
2010-11-20 19:33 ` Jesper Juhl
2010-11-20 19:51 ` Mike Galbraith
2010-11-20 20:37 ` Jesper Juhl
2010-11-20 22:02 ` Konstantin Svist
2010-11-20 22:15 ` Samuel Thibault
2010-11-20 22:18 ` Thomas Fjellstrom
2010-11-20 20:25 ` Samuel Thibault
2010-11-15 23:46 ` Mike Galbraith
2010-11-15 23:50 ` Linus Torvalds
2010-11-16 0:04 ` Mike Galbraith
2010-11-16 1:18 ` Linus Torvalds
2010-11-16 1:55 ` Paul Menage
2010-11-16 12:58 ` Mike Galbraith
2010-11-16 18:25 ` Paul Menage
2010-11-16 13:59 ` Peter Zijlstra
2010-11-16 14:26 ` Mike Galbraith
2010-10-21 11:27 ` [RFC/RFT PATCH] " Mike Galbraith
2010-10-20 13:55 ` Markus Trippelsdorf
2010-10-20 14:41 ` Mike Galbraith
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