Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760937Ab2EWVoX (ORCPT ); Wed, 23 May 2012 17:44:23 -0400 Received: from mail-wg0-f42.google.com ([74.125.82.42]:42266 "EHLO mail-wg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755697Ab2EWVoU (ORCPT ); Wed, 23 May 2012 17:44:20 -0400 From: Juri Lelli To: peterz@infradead.org, tglx@linutronix.de Cc: mingo@redhat.com, rostedt@goodmis.org, oleg@redhat.com, fweisbec@gmail.com, darren@dvhart.com, johan.eker@ericsson.com, p.faure@akatech.ch, linux-kernel@vger.kernel.org, claudio@evidence.eu.com, michael@amarulasolutions.com, fchecconi@gmail.com, tommaso.cucinotta@sssup.it, juri.lelli@gmail.com, nicola.manica@disi.unitn.it, luca.abeni@unitn.it, dhaval.giani@gmail.com, hgu1972@gmail.com, paulmck@linux.vnet.ibm.com, raistlin@linux.it, insop.song@ericsson.com, liming.wang@windriver.com, jkacur@redhat.com, harald.gustafsson@ericsson.com Subject: [RFC][PATCH 00/15] sched: SCHED_DEADLINE v5 Date: Wed, 23 May 2012 23:42:40 +0200 Message-Id: <1337809375-24295-1-git-send-email-juri.lelli@gmail.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7529 Lines: 165 Hello everyone, This is the take 5 for the SCHED_DEADLINE patchset. The patchset introduces a new deadline based real-time task scheduling policy --called SCHED_DEADLINE-- with bandwidth isolation (aka "resource reservation") capabilities. It supports global/clustered multiprocessor scheduling through dynamic task migrations. From the previous releases[1]: - comments and fixes coming from the reviews we got have been considered and mostly applied; still awaiting: * Steven Rostedt's "take into account the RT tasks" when migrating DL tasks; the DL push/pull mechanism will probably see major changes (RT tasks accounting included) on which we are currently working; * Peter Zijlstra's "gcc work-around"; based on a not yet mainline accepted patch; * Peter Zijlstra's "unify the use of nr_cpus_allowed" suggestion was addressed too; however this changes too are based on a not yet merged patch. - this release is on top of tip/master (as of today), so the actual news is the rebase on v3.4 :-); anyway, -rt guys can find -rt branches on the repo (more info below); - first two patches are Peter Zijlstra's math128; later patches are a use-case for them. Still missing/incomplete: - (c)group based bandwidth management, and maybe scheduling; - bandwidth inheritance (to replace deadline/priority inheritance); - access control for non-root users (and related security concerns to address). The development is taking place at: https://github.com/jlelli/sched-deadline The repo has been cleaned-up, main branches are now: - mainline-dl: tracking tip/master (raw commits); - linux-rt-dl: tracking -rt releases; - linux-stable-rt-dl: tracking Rostedt's 3.2-stable-rt branch[2]; - sched-dl-V5: this patchset on top of tip/master. Check the repositories frequently if you're interested, and feel free to e-mail me for any issue you run into. Test application: https://github.com/gbagnoli/rt-app Development mailing list: linux-dl; you can subscribe from here: http://feanor.sssup.it/mailman/listinfo/linux-dl or via e-mail (send a message to linux-dl-request@retis.sssup.it with just the word `help' as subject or in the body to receive info). There is also a parallel branch maintained by Insop Song (from Ericsson) (https://github.com/insop/sched-deadline2). Ericsson is in fact evaluating the use of SCHED_DEADLINE for CPE (Customer Premise Equipment) devices in order to reserve CPU bandwidth to processes. The code was being jointly developed by ReTiS Lab (http://retis.sssup.it) and Evidence S.r.l (http://www.evidence.eu.com) in the context of the ACTORS EU-funded project (http://www.actors-project.eu). It is now also supported by the S(o)OS EU-funded project (http://www.soos-project.eu/). It has also some users, both in academic and applied research. We got positive feedbacks from Ericsson (see above), Wind River, Porto (ISEP), Trento, Lund and Malardalen universities. As usual, any kind of feedback is welcome and appreciated. Thanks in advice and regards, - Juri [1] http://lwn.net/Articles/376502, http://lwn.net/Articles/353797, http://lwn.net/Articles/412410, http://lwn.net/Articles/490944 [2] http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/README Dario Faggioli (9): sched: add sched_class->task_dead. sched: add extended scheduling interface. sched: SCHED_DEADLINE structures & implementation. sched: SCHED_DEADLINE avg_update accounting. sched: add schedstats for -deadline tasks. sched: add latency tracing for -deadline tasks. sched: drafted deadline inheritance logic. sched: add bandwidth management for sched_dl. sched: add sched_dl documentation. Peter Zijlstra (3): math128: Introduce various 128bit primitives math128, x86_64: Implement {mul,add}_u128 in 64bit asm rtmutex: turn the plist into an rb-tree. Juri Lelli (2): sched: SCHED_DEADLINE SMP-related data structures & logic. sched: speed up -dl pushes with a push-heap. Harald Gustafsson (1): sched: add period support for -deadline tasks. Documentation/scheduler/sched-deadline.txt | 164 +++ arch/alpha/include/asm/Kbuild | 1 + arch/arm/include/asm/Kbuild | 1 + arch/arm/include/asm/unistd.h | 3 + arch/arm/kernel/calls.S | 3 + arch/avr32/include/asm/Kbuild | 1 + arch/blackfin/include/asm/Kbuild | 1 + arch/c6x/include/asm/Kbuild | 1 + arch/cris/include/asm/Kbuild | 1 + arch/frv/include/asm/Kbuild | 1 + arch/h8300/include/asm/Kbuild | 1 + arch/hexagon/include/asm/Kbuild | 1 + arch/ia64/include/asm/Kbuild | 1 + arch/m32r/include/asm/Kbuild | 1 + arch/m68k/include/asm/Kbuild | 1 + arch/microblaze/include/asm/Kbuild | 1 + arch/mips/include/asm/Kbuild | 1 + arch/mn10300/include/asm/Kbuild | 1 + arch/openrisc/include/asm/Kbuild | 1 + arch/parisc/include/asm/Kbuild | 1 + arch/powerpc/include/asm/Kbuild | 1 + arch/s390/include/asm/Kbuild | 1 + arch/score/include/asm/Kbuild | 1 + arch/sh/include/asm/Kbuild | 1 + arch/sparc/include/asm/Kbuild | 1 + arch/tile/include/asm/Kbuild | 1 + arch/um/include/asm/Kbuild | 1 + arch/unicore32/include/asm/Kbuild | 1 + arch/x86/include/asm/math128.h | 39 + arch/x86/syscalls/syscall_32.tbl | 3 + arch/x86/syscalls/syscall_64.tbl | 3 + arch/xtensa/include/asm/Kbuild | 1 + include/asm-generic/math128.h | 4 + include/linux/init_task.h | 10 + include/linux/math128.h | 180 +++ include/linux/rtmutex.h | 18 +- include/linux/sched.h | 155 ++- include/linux/syscalls.h | 7 + kernel/fork.c | 8 +- kernel/hrtimer.c | 2 +- kernel/rtmutex-debug.c | 10 +- kernel/rtmutex.c | 161 ++- kernel/rtmutex_common.h | 22 +- kernel/sched/Makefile | 4 +- kernel/sched/core.c | 689 +++++++++++- kernel/sched/cpudl.c | 208 ++++ kernel/sched/cpudl.h | 33 + kernel/sched/debug.c | 46 + kernel/sched/dl.c | 1646 ++++++++++++++++++++++++++++ kernel/sched/rt.c | 2 +- kernel/sched/sched.h | 143 +++ kernel/sched/stop_task.c | 2 +- kernel/sysctl.c | 14 + kernel/trace/trace_sched_wakeup.c | 44 +- kernel/trace/trace_selftest.c | 30 +- lib/Makefile | 2 +- lib/math128.c | 40 + 57 files changed, 3586 insertions(+), 135 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/