linaro-dev July 2012

linaro-dev@lists.linaro.org

77 participants
80 discussions

by Zach Pfeffer

Same link: https://launchpad.net/linaro-android/+milestone/12.08 :) On 25 July 2012 21:49, Zach Pfeffer <zach.pfeffer(a)linaro.org> wrote: > Take a look at: > > https://launchpad.net/linaro-android/+milestone/12.08 > > (lots of JB) > > -- > Zach Pfeffer > Android Platform Team Lead, Linaro Platform Teams > Linaro.org | Open source software for ARM SoCs > Follow Linaro: http://www.facebook.com/pages/Linaro > http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

11 years, 9 months

Re: Tejun's modifications for CPU hotplug and workqueues

by Paul E. McKenney

Hello! Tejun just this week posted patches that park the workqueue kthreads, which should reduce CPU-online latency under load. The easiest way to get these patches appears to be to pull them from Tejun's git tree: git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git review-wq-hotplug They pass some extremely mild rcutorture/hotplug testing, and more testing will follow. Please take a look at these and give them a go. Thanx, Paul

11 years, 9 months

[GIT PULL] bit-LITTLE-MP-v4

by Viresh Kumar

Hi Andrey, V4 contains following updates: - wq-hotplug patches from Tejun - slow-fast CPU DT support from Tixy - All branches rebased on v3.5 They are compile tested. ---------------------8<------------------------ The following changes since commit 28a33cbc24e4256c143dce96c7d93bf423229f92: Linux 3.5 (2012-07-21 13:58:29 -0700) are available in the git repository at: git://git.linaro.org/arm/big.LITTLE/mp.git big-LITTLE-MP-v4 for you to fetch changes up to 5ac93ea2e717a4aef7cdc4b09466955b25d4c42c: Merge branches 'arm-asymmetric-support-v3', 'cpuidle-next-v4', 'per-cpu-thread-hotplug-v3', 'fast-slow-cpu-dt-v1', 'wq-hotplug-v1' and 'config-fragments' into big-LITTLE-MP-v4 (2012-07-25 10:36:36 +0100) ---------------------------------------------------------------- Ben Segall (1): sched: maintain per-rq runnable averages Colin Cross (4): cpuidle: refactor out cpuidle_enter_state cpuidle: fix error handling in __cpuidle_register_device cpuidle: add support for states that affect multiple cpus cpuidle: coupled: add parallel barrier function Jon Medhurst (4): configs: Initial core configs configs: Make CONFIG_MODULES part of linaro-base Merge branch 'config-core-3.4' into config-core-tracking configs: Replace CONFIG_PERF_COUNTERS with CONFIG_PERF_EVENTS Jon Medhurst (Tixy) (1): sched: Use device-tree to provide fast/slow CPU list for HMP Morten Rasmussen (5): sched: Add ftrace events for entity load-tracking sched: entity load-tracking load_avg_ratio sched: load-tracking driven wakeup migration for HMP platforms sched: Forced migration of high load task on HMP platforms sched: Add HMP forced task migration ftrace event Paul E. McKenney (1): rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread Paul Turner (15): sched: track the runnable average on a per-task entitiy basis sched: aggregate load contributed by task entities on parenting cfs_rq sched: maintain the load contribution of blocked entities sched: add an rq migration call-back to sched_class sched: account for blocked load waking back up sched: aggregate total task_group load sched: compute load contribution by a group entity sched: normalize tg load contributions against runnable time sched: maintain runnable averages across throttled periods sched: replace update_shares weight distribution with per-entity computation sched: refactor update_shares_cpu() -> update_blocked_avgs() sched: update_cfs_shares at period edge sched: make __update_entity_runnable_avg() fast sched: implement usage tracking sched: introduce temporary FAIR_GROUP_SCHED dependency for load-tracking Peter Zijlstra (1): sched, x86: Remove broken power estimation Ricardo Salveti de Araujo (8): configs: moving previous ubuntu.conf as ubuntu-minimal and creating a full ubuntu one configs: ubuntu: be compatible with the enforce script configs: ubuntu: disabling CODA_FS, seems to be broken atm configs: ubuntu: disabling CGROUPS as default Merge branch 'config-core-3.4' into config-core-tracking configs: ubuntu: updating configs for 3.5 configs: ubuntu: disabling CONFIG_MTD_NAND_NANDSIM=m, breaking build config: ubuntu: ATH6KL should be platform dependent Tejun Heo (18): workqueue: don't use WQ_HIGHPRI for unbound workqueues workqueue: factor out worker_pool from global_cwq workqueue: use @pool instead of @gcwq or @cpu where applicable workqueue: separate out worker_pool flags workqueue: introduce NR_WORKER_POOLS and for_each_worker_pool() workqueue: reimplement WQ_HIGHPRI using a separate worker_pool workqueue: perform cpu down operations from low priority cpu_notifier() workqueue: drop CPU_DYING notifier operation workqueue: ROGUE workers are UNBOUND workers workqueue: use mutex for global_cwq manager exclusion workqueue: drop @bind from create_worker() workqueue: reimplement CPU online rebinding to handle idle workers workqueue: don't butcher idle workers on an offline CPU workqueue: remove CPU offline trustee workqueue: simplify CPU hotplug code kthread_worker: reorganize to prepare for flush_kthread_work() reimplementation kthread_worker: reimplement flush_kthread_work() to allow freeing the work item being executed workqueue: fix spurious CPU locality WARN from process_one_work() Thomas Gleixner (6): rcu: Yield simpler kthread: Implement park/unpark facility smpboot: Provide infrastructure for percpu hotplug threads softirq: Use hotplug thread infrastructure watchdog: Use hotplug thread infrastructure infiniband: ehca: Use hotplug thread infrastructure Vincent Guittot (4): ARM: topology: Add arch_scale_freq_power function ARM: topology: factorize the update of sibling masks ARM: topology: Update cpu_power according to DT information sched: cpu_power: enable ARCH_POWER Viresh Kumar (3): configs: Add config fragments for big LITTLE MP linaro/configs: Update big LITTLE MP fragment for task placement work Merge branches 'arm-asymmetric-support-v3', 'cpuidle-next-v4', 'per-cpu-thread-hotplug-v3', 'fast-slow-cpu-dt-v1', 'wq-hotplug-v1' and 'config-fragments' into big-LITTLE-MP-v4 Documentation/workqueue.txt | 103 +- arch/arm/Kconfig | 29 + arch/arm/kernel/topology.c | 278 ++++- arch/x86/kernel/cpu/Makefile | 2 +- arch/x86/kernel/cpu/sched.c | 55 - drivers/cpuidle/Kconfig | 3 + drivers/cpuidle/Makefile | 1 + drivers/cpuidle/coupled.c | 715 +++++++++++ drivers/cpuidle/cpuidle.c | 68 +- drivers/cpuidle/cpuidle.h | 32 + drivers/infiniband/hw/ehca/ehca_irq.c | 253 ++-- drivers/infiniband/hw/ehca/ehca_irq.h | 6 +- include/linux/cpu.h | 5 +- include/linux/cpuidle.h | 11 + include/linux/kthread.h | 19 +- include/linux/sched.h | 19 + include/linux/smpboot.h | 43 + include/trace/events/sched.h | 151 +++ include/trace/events/workqueue.h | 2 +- kernel/cpu.c | 10 +- kernel/kthread.c | 273 ++++- kernel/rcutree.c | 12 +- kernel/rcutree.h | 15 +- kernel/rcutree_plugin.h | 403 ++----- kernel/rcutree_trace.c | 3 +- kernel/sched/core.c | 5 + kernel/sched/debug.c | 39 +- kernel/sched/fair.c | 1099 ++++++++++++++--- kernel/sched/features.h | 2 +- kernel/sched/sched.h | 60 +- kernel/smpboot.c | 229 ++++ kernel/smpboot.h | 4 + kernel/softirq.c | 107 +- kernel/watchdog.c | 263 ++-- kernel/workqueue.c | 1144 ++++++++---------- linaro/configs/android.conf | 30 + linaro/configs/big-LITTLE-MP.conf | 9 + linaro/configs/linaro-base.conf | 84 ++ linaro/configs/ubuntu-minimal.conf | 24 + linaro/configs/ubuntu.conf | 2133 +++++++++++++++++++++++++++++++++ 40 files changed, 5935 insertions(+), 1808 deletions(-) delete mode 100644 arch/x86/kernel/cpu/sched.c create mode 100644 drivers/cpuidle/coupled.c create mode 100644 include/linux/smpboot.h create mode 100644 linaro/configs/android.conf create mode 100644 linaro/configs/big-LITTLE-MP.conf create mode 100644 linaro/configs/linaro-base.conf create mode 100644 linaro/configs/ubuntu-minimal.conf create mode 100644 linaro/configs/ubuntu.conf

11 years, 9 months

Cross compiler backport for Ubuntu 12.04 'precise' is available

by Marcin Juszkiewicz

Hello I would like to announce backport of cross compiler for Ubuntu 12.04 LTS distribution. Release contains: - binutils 2.22.52 snapshot - gcc 4.6.3 (Linaro 12.06) - gcc 4.7.1 (Linaro 12.07) - eglibc 2.15 - linux 3.5.0 headers Packages are available for amd64 and i386 architectures and support building for both armel and armhf targets. PPA: https://launchpad.net/~linaro-maintainers/+archive/toolchain Previous Ubuntu releases are not supported - please upgrade to 12.04 LTS.

11 years, 9 months

[PATCH] Add -fno-exceptions and -fno-rtti in Android.mk

by kejun.zhou

From: "kejun.zhou" <dp583(a)stebjsxu0119.(none)> Signed-off-by: kejun.zhou <kejun.zhou(a)linaro.org> --- Android.mk | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Android.mk b/Android.mk index c82cd95..fa1c225 100644 --- a/Android.mk +++ b/Android.mk @@ -28,7 +28,9 @@ LOCAL_CPPFLAGS += -DDISABLE_I18N \ -DNCURSES_NOMACROS \ -DHAVE_NO_PCI \ -DDEFAULT_TERM=\"xterm\" \ - -DTERMINFO_PATH=\"/system/etc/terminfo\" + -DTERMINFO_PATH=\"/system/etc/terminfo\" \ + -fno-exceptions \ + -fno-rtti \ LOCAL_C_INCLUDES += external/stlport/stlport/ \ external/stlport/stlport/stl \ -- 1.7.10

11 years, 9 months

First-cut 12.08 Android plan available

by Zach Pfeffer

Take a look at: https://launchpad.net/linaro-android/+milestone/12.08 (lots of JB) -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

11 years, 9 months

Nexus 7/Jellybean Kernel Config

by Christian Robottom Reis

Hey there, I stumbled onto a thread on xdadevelopers where they are looking at the Nexus 7; apart from partition and df output, there's a 3.1.10 kernel config, which I'm attaching here for convenience and analysis. ls -l /dev/block/platform/sdhci-tegra.3/by-name/ lrwxrwxrwx root root 2012-06-28 11:51 APP -> /dev/block/mmcblk0p3 lrwxrwxrwx root root 2012-06-28 11:51 CAC -> /dev/block/mmcblk0p4 lrwxrwxrwx root root 2012-06-28 11:51 LNX -> /dev/block/mmcblk0p2 lrwxrwxrwx root root 2012-06-28 11:51 MDA -> /dev/block/mmcblk0p8 lrwxrwxrwx root root 2012-06-28 11:51 MSC -> /dev/block/mmcblk0p5 lrwxrwxrwx root root 2012-06-28 11:51 PER -> /dev/block/mmcblk0p7 lrwxrwxrwx root root 2012-06-28 11:51 SOS -> /dev/block/mmcblk0p1 lrwxrwxrwx root root 2012-06-28 11:51 UDA -> /dev/block/mmcblk0p9 lrwxrwxrwx root root 2012-06-28 11:51 USP -> /dev/block/mmcblk0p6 Filesystem Size Used Free Blksize /dev 487M 32K 487M 4096 /mnt/asec 487M 0K 487M 4096 /mnt/obb 487M 0K 487M 4096 /system 639M 422M 217M 4096 /cache 436M 7M 428M 4096 /data 5G 4G 1G 4096 /storage/sdcard0 5G 4G 1G 4096 /mnt/asec/com.lexi.android-1 3M 1M 1M 4096 Enjoy, -- Christian Robottom Reis, Engineering VP Brazil (GMT-3) | [+55] 16 9112 6430 | [+1] 612 216 4935 Linaro.org: Open Source Software for ARM SoCs

11 years, 9 months

Error tinyhal on pandaboard

by Asha Anand

Hi, I am studying the tinyhal with linaro android source on pandaboard in order to port tinyhal to our custom board. >> Does the latest pandaboard binaries from https://android-build.linaro.org/builds/~linaro-android/panda-ics-gcc47-til… include the tinyhal(Mark XML) modifications? >> Also, I got the source from https://wiki.linaro.org/Platform/Android/GetSource and built using steps in https://wiki.linaro.org/Platform/Android/BuildSource I followed the steps in attached README file from the tinyhal-linaro-5e2c100. I get the below error build/core/base_rules.mk:166: *** hardware/linaro/tinyhal: MODULE.TARGET.SHARED_LIBRARIES.audio.primary.omap4 already defined by device/linaro/pandaboard/audio. Stop. The tinyhal panda code is present in hardware/linaro/tinyhal and according to README should also be copied to device/linaro/pandaboard? Please let me know. Thanks, Asha

11 years, 9 months

Reviewing big.LITTLE MP documentation

by Vikram Dhillon

Hi all, I am in the process of documenting the major developments that have occurred since last year in big.LITTLE processing and I will post a formal RFC soon, before that I wanted to get some idea of whether I'm going in the right direction. So following some wiki-pages and pull requests, I'm going to document the following: ================== - Paul Turner's load tracking patchset (15) - Thomas Gleixner's per-cpu-thread hotplugging (6) - Vincent Guittot's topology patchset and the ARM topology definition patchset: http://patches.linaro.org/2444/ (~6) - Colin Cross's patchset removing the cpuidle patchset that removes cpu0 power down restriction (4) - Morten Rasmussen's forced HMP task migration patchset (5) ================== Please let me know if I missing out any important patch-sets? These patches come with ample documentation but thus far I haven't seen a single hub to get updates or information regarding them. Thanks for your time! -- Regards, Vikram Dhillon

11 years, 9 months

2012/7/25 Linaro Android Platform Team meeting agenda posted

by Zach Pfeffer

Linaro Android platform team agenda posted to https://wiki.linaro.org/Platform/Android/Meetings/2012-07-25. 13:00 UTC in #linaro-meeting on irc.freenode.net on 2012/7/25. We’re going to present our JB upgrade plan (basically put the kernels we’re currently using into the builds and start fixing stuff). -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

11 years, 9 months

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linaro-dev July 2012