Messages in this thread | | | From | Juri Lelli <> | Subject | [PATCH 00/14] sched: SCHED_DEADLINE v7 | Date | Mon, 11 Feb 2013 10:50:42 -0800 |
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Hello everyone,
several changes, some bugfixes and a major testing effort bring me to release a new version of the SCHED_DEADLINE patchset (v7). In addition, given the fact that the project has been around for quite some time with always a positive feedback from the community and since we have reached a stable and tested set of functionalities, I think it is time to remove the RFC tag. However, I consider this as another intermediate release as I would like even more testing from the community itself and I'm also working to ship a motivating use case with next releases. I had many interactions with users, especially from industry, after past releases. Some of them seem to confirm their interest proposing enhancements and modifications (e.g., http://bit.ly/XVQWrb); some others are willing to collaborate directly. This makes me confident that such a use case is on the way.
If you missed the whole story[1], this 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]:
- rebase on top of 3.8-rc7; - comments and fixes coming from the reviews we got have been considered and applied; - u128 support has been removed and internal math has been restricted to microseconds resolution (to avoid overflows); - dl.c, cpudl.{c,h} renamed as deadline.c, cpudeadline.{c,h}; - documentation fixed and extended (how to pin -dl tasks to CPUs via cpusets example added).
The development is taking place at: https://github.com/jlelli/sched-deadline
Main branches:
- sched-dl-V7: this patchset on top of tip/master. - mainline-dl: tracking tip/master (raw commits);
Check the repositories frequently if you're interested, and feel free to e-mail me for any issue you run into.
Test applications: https://github.com/gbagnoli/rt-app https://github.com/jlelli/schedtool-dl
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).
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 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, 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, http://lwn.net/Articles/498472, http://lwn.net/Articles/521091
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.
Harald Gustafsson (1): sched: add period support for -deadline tasks.
Juri Lelli (3): sched: SCHED_DEADLINE SMP-related data structures & logic. sched: make dl_bw a sub-quota of rt_bw sched: speed up -dl pushes with a push-heap.
Peter Zijlstra (1): rtmutex: turn the plist into an rb-tree.
Documentation/scheduler/sched-deadline.txt | 195 ++++ arch/arm/include/asm/unistd.h | 2 +- arch/arm/include/uapi/asm/unistd.h | 3 + arch/arm/kernel/calls.S | 3 + arch/x86/syscalls/syscall_32.tbl | 3 + arch/x86/syscalls/syscall_64.tbl | 3 + include/linux/init_task.h | 10 + include/linux/rtmutex.h | 18 +- include/linux/sched.h | 152 ++- include/linux/syscalls.h | 7 + include/uapi/linux/sched.h | 1 + kernel/fork.c | 8 +- kernel/futex.c | 2 + kernel/hrtimer.c | 2 +- kernel/rtmutex-debug.c | 8 +- kernel/rtmutex.c | 163 ++- kernel/rtmutex_common.h | 22 +- kernel/sched/Makefile | 4 +- kernel/sched/core.c | 657 ++++++++++- kernel/sched/cpudeadline.c | 208 ++++ kernel/sched/cpudeadline.h | 33 + kernel/sched/deadline.c | 1658 ++++++++++++++++++++++++++++ kernel/sched/debug.c | 46 + kernel/sched/rt.c | 2 +- kernel/sched/sched.h | 146 +++ kernel/sched/stop_task.c | 2 +- kernel/sysctl.c | 7 + kernel/trace/trace_sched_wakeup.c | 44 +- kernel/trace/trace_selftest.c | 28 +- 29 files changed, 3317 insertions(+), 120 deletions(-) create mode 100644 Documentation/scheduler/sched-deadline.txt create mode 100644 kernel/sched/cpudeadline.c create mode 100644 kernel/sched/cpudeadline.h create mode 100644 kernel/sched/deadline.c
-- 1.7.9.5
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