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big.LITTLE MP status May 28, 2013

by Serge Broslavsky

https://wiki.linaro.org/projects/big.LITTLE.MP Work Items for functional completion: https://wiki.linaro.org/projects/big.LITTLE.MP/WorkItems Roadmap Cards: Epic big.LITTLE MP card - http://cards.linaro.org/browse/CARD-190 The card is being reworked to split the work that is completed and the ongoing/to be done one. Proposal to be presented to TSC. Main Project page: https://launchpad.net/linaro-big-little-system Development ============ 1. big.LITTLE IKS Current IKS snapshot: git://git.linaro.org/landing-teams/working/arm/kernel.git More information: http://lists.linaro.org/pipermail/linaro-dev/2013-May/015882.html Also the latest Linaro 13.05 release contains big.LITTLE release with IKS code integrated. By default MP is used (IKS is off). To enable IKS: echo 1 > /sys/kernel/bL_switcher/active 2. big.LITTLE MP There are two branches, which are functionally equivalent - they tweak the scheduler to select the right processes to move to the A15 and try to decrease power consumption while maintaining performance. * A Reference (stable) big.LITTLE MP patchset (merged with linux-linaro): https://git.linaro.org/gitweb?p=arm/big.LITTLE/mp.git;a=shortlog;h=refs/hea… Recommended to be used for testing. * And an upstream (work in progress) big.LITTLE MP patchset: https://git.linaro.org/gitweb?p=arm/big.LITTLE/mp.git;a=shortlog;h=refs/hea… Being worked on in order to achieve the performance/power numbers of the reference one. * Documentation: Code flow is already covered by several LWN articles. See https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/ in the Articles section. We will provide a tuning guide once we have reached agreement upstream. * Automated benchmarking code is ready: - A python script to download LAVA bundle and extract results and populate results on to given Google spreadsheet is complete and is in use. Blueprint Updates ------------------ * https://blueprints.launchpad.net/linaro-big-little-system/+spec/big-little-… Ongoing work. * https://blueprints.launchpad.net/linaro-big-little-system/+spec/small-task-… - new version is being worked on - a comparison shows that pst-v4 provides the best results: https://lkml.org/lkml/2013/5/30/257 * https://blueprints.launchpad.net/linaro-big-little-system/+spec/cpu-hot-plu… - done. * https://blueprints.launchpad.net/linaro-big-little-system/+spec/sched-coope… - No resources available (resource is being moved to the other team). - To be discussed on the next OPSCOM. QA == * https://blueprints.launchpad.net/linaro-qa/+spec/prepare-iks-testing-code-t… - Done. - Testing done on VE TC2 using different CPU topologies in DT. big.LITTLE MP LAVA Dashboard http://validation.linaro.org/lava-server/dashboard/image-reports/linaro-and… Testing (week 22): sched_tests.git #Cases #Run Pass Fail Absolute pass rate Regression 20 19 19 0 100 % mpbasicsuite 14 10 10 0 100 % mpcoresuite 10 6 6 0 100 % mpextendedsuite 20 10 7 3 70 % mploadbalance 2 2 2 0 100 % http://lists.linaro.org/pipermail/linaro-dev/2013-May/016006.html Bugs: https://bugs.launchpad.net/linaro-big-little-system/+bugs?field.tag=bl-mp Highlight: Bug 1166246 - Lockup on post 3.9 IKS kernel - reproduced on ARM side, waiting for HW engineers to become available (next week) to continue investigation. - seems to be related to MMC being in use (switching to USB stick can be used as a reliable workaround). -- Best Regards, Serge Broslavsky <serge.broslavsky(a)linaro.org> Project Manager, Linaro M: +37129426328 IRC: ototo Skype: serge.broslavsky http://linaro.org | Open source software for ARM SoCs

13 years, 1 month

[PATCH V2 2/2] USB: OHCI: add a name for the platform-private field

by manjunath.goudar＠linaro.org

From: Manjunath Goudar <manjunath.goudar(a)linaro.org> This patch adds an ohci->priv field for private use by OHCI platform drivers. Until now none of the platform drivers has used this private space, but that's about to change in the next patch of this series. In V2: No changes. Signed-off-by: Manjunath Goudar <manjunath.goudar(a)linaro.org> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Greg KH <greg(a)kroah.com> Cc: Alan Stern <stern(a)rowland.harvard.edu> Cc: linux-usb(a)vger.kernel.org --- drivers/usb/host/ohci.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h index 3b58482..e2e5faa 100644 --- a/drivers/usb/host/ohci.h +++ b/drivers/usb/host/ohci.h @@ -421,6 +421,9 @@ struct ohci_hcd { struct dentry *debug_periodic; struct dentry *debug_registers; #endif + /* platform-specific data -- must come last */ + unsigned long priv[0] __aligned(sizeof(s64)); + }; #ifdef CONFIG_PCI -- 1.7.9.5

13 years, 1 month

Tiny BL switcher compatibility issue with PMU on non-BL SoC

by Andy Green

Hi - We're using one kernel binary with BL Switcher enabled in config, but able to work on SoC without Big Little. This is OK except where the BL patches touch the PMU driver. It makes an assumption about BL configured == in use which is not true. PMU init fails and when you try to use perf list later, it blows chunks. I worked around it with the hack below, so it can fail out from the bigLITTLE path when it doesn't see the cluster property in DT, but there's presumably a better way to do that which more directly checks if we care about BL in this execution environment. -Andy Author: Andy Green <andy.green(a)linaro.org> Date: Thu May 30 09:44:17 2013 +0800 bl switcher fix dont assume bl active in pmu probe Signed-off-by: Andy Green <andy.green(a)linaro.org> diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c index b3ae24f..c02ea21 100644 --- a/arch/arm/kernel/perf_event_cpu.c +++ b/arch/arm/kernel/perf_event_cpu.c @@ -440,6 +440,9 @@ static int cpu_pmu_device_probe(struct platform_device *pdev) hwid = of_get_property(ncluster, "reg", &len); if (hwid && len == 4) cluster = be32_to_cpup(hwid); + } else { + ret = probe_current_pmu(pmu); + goto bail; } /* set sibling mask to all cpu mask if socket is not specified */ /* @@ -501,7 +504,7 @@ static int cpu_pmu_device_probe(struct platform_device *pdev) } else { ret = probe_current_pmu(pmu); } - +bail: if (ret) goto error; -- Andy Green | Fujitsu Landing Team Leader Linaro.org │ Open source software for ARM SoCs | Follow Linaro http://facebook.com/pages/Linaro/155974581091106 - http://twitter.com/#!/linaroorg - http://linaro.org/linaro-blog

13 years, 1 month

Test Result Summary of Linaro 13.05 Release for Linux Linaro ubuntu Raring.

by Botao Sun

Linaro 13.05 Release (Calendar Week 22, 2013): Here is test result summary for Linux Linaro ubuntu Raring image on following boards: 1) ARM Versatile Express A9; 2) Samsung Arndale; 3) TI Panda 4430; 4) TI Panda 4460; 5) ST Ericsson Snowball. Synopsis: Kernel version has been upgraded to 3.10.0-1, no release is available for TI Panda 4430 and 4460. Consolidated Test Result Spreadsheet: https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AgB-fT5LL31CdEtLT… 1. ARM Versatile Express A9 + Linux Linaro Raring (Column X): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdFNmV… Kernel panic happened in "Halt" & "Reboot" test, all other features work well. 2. Samsung Arndale + Linux Linaro Raring (Column R): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AgB-fT5LL31CdGZJS… "Halt" & "Reboot" test failed. Kernel panic happened in power management test. All other features work well. 3. TI Panda 4430 + Linux Linaro Raring (Column X): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdEwwZ… Boot failed. 4. TI Panda 4460 + Linux Linaro Raring (Column X): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdEwwZ… Boot failed. 5. ST Ericsson Snowball + Linux Linaro Raring (Column Y): https://docs.google.com/a/linaro.org/spreadsheet/ccc?key=0AroPySpr4FnEdFJ4X… The board now can boot up successfully and stably every time, SD MMC test passed too. "Reboot" failed, display is unavailable either. "thermal_02.4" and "thermal_03.1" failed in power management test, all other features work well. For test summary of last week (Calendar Week 21), please refer to attachment. Thank you. Best Regards Botao Sun

13 years, 1 month

arm-probe (with ARM Energy probe)

by Robert Brehm

Hi, I have downloaded and compiled/installed (on Ubuntu 12.04 the arm-probe from: https://git.linaro.org/gitweb?p=tools/arm-probe.git;a=tree Now I am facing some issues using the tool. My Arm Energy Probe shows up as virtual serial port as /dev/ttyACM0 and I am able to open that port via " # sudo screen /dev/ttyACM0 and when I "ctrl-c" in screen I get a response from the energy probe saying "ARM Energy Probe". So the probe should be working fine. If I however run # arm-probe -c ch1 All it just shows is the blelow, there are no data streamed out at all: # configuration: ./config # config_name: K70-SOM # trigger: 0.400000V (hyst 0.200000V) 0.000000W (hyst 0.200000W) 400us Configuration: K70-SOM # date: Fri, 24 May 2013 15:45:57 +0200 # host: rb # This is the content of my configuration file: # arm-probe configuration file # # setup name K70-SOM /dev/ttyACM0 ch1 0.470 1 -0.000253 0 VCORE1/MPU ch2 0.470 2 -0.000253 0 VCORE1/MPU ch3 0.470 3 -0.000253 0 VCORE1/MPU I have changed file permissions for /dev/ttyACM0, so that should be fine. Additionally when I run the above arm-probe command it doesn't really care if the Arm Energy probe is connected or not - it doesn't complain it the /dev/ttyACM0 is there or not. Any help on that would be appreciated. Thanks. Best, Rob.

13 years, 1 month

[RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver

by Manjunath Goudar

This series of patches begins the process of splitting ohci-hcd up into a core library module and independent pci driver modules. Patch 1/3 prepares the way by exporting a few functions from ohci-hcd and adding a new mechanism for platform-specific drivers to initialize their hc_driver structures. This deserves to be done in the core because almost all of the entries in these structures are pure boilerplate -- practically none of the drivers need to override more than three of the standard core values. Patch 2/3 is part of separating the ohci pci host controller driver from ohci-hcd host code. Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file and EXPORTed, this is part of the effort to move the ohci pci related code to generic pci code. Patch 3/3 separate out ohci-pci into independent driver modules. Manjunath Goudar (3): USB: OHCI: prepare to make ohci-hcd a library module USB: OHCI: Generic changes to make ohci-pci a separate driver USB: OHCI: make ohci-pci a separate driver drivers/usb/host/Kconfig | 4 +- drivers/usb/host/Makefile | 3 + drivers/usb/host/ohci-hcd.c | 132 +++++++++++++++++++++++++---------- drivers/usb/host/ohci-hub.c | 1 - drivers/usb/host/ohci-pci.c | 152 ++++++++++++----------------------------- drivers/usb/host/ohci-q.c | 6 +- drivers/usb/host/ohci.h | 17 +++++ drivers/usb/host/pci-quirks.c | 13 ++++ drivers/usb/host/pci-quirks.h | 2 + 9 files changed, 181 insertions(+), 149 deletions(-) -- 1.7.9.5

13 years, 1 month

Search for technical support of Foundation Model

by Wang Wei

Hi all, Now, we want to boot a specific operation system running on Foundation Model. Because Foundation Model isa virtual platform incorporating an AArch64 architecture <http://www.arm.com/zh/products/tools/development-tools-for-armv8.php> simulation model, we need more detailed and comprehensive technical support. What we want to know as following: First, whether Foundation Model can support debugging application and kernel code which should need to run on Foundation Model step by step? If Foundation Model can support debug, what should we do next? If Foundation Model cannot support debug, are there some other tools which can support debugging application and kernel code? Are there some documents which can introduce the way to use the tool? Second, whether Foundation Model can support usb driver, network driver? If Foundation Model can support them, how we can transmit boot loader to Foundation Model and can boot loader run on Foundation Model? · Third, how many boot modes Foundation Model can support? Such as uBoot, whether Foundation Model can support the bootmode <app:ds:starting%20mode> such as aBoot? The introduction of aBoot is as following:http://wiki.barrelfish.org/PandaBoard Thanks Xiaoke Wu

13 years, 1 month

big.LITTLE MP status May 21, 2013

by Serge Broslavsky

https://wiki.linaro.org/projects/big.LITTLE.MP Work Items for functional completion: https://wiki.linaro.org/projects/big.LITTLE.MP/WorkItems Roadmap Cards: Epic big.LITTLE MP card - http://cards.linaro.org/browse/CARD-190 The card is being reworked to split the work that is completed and the ongoing/to be done one. Proposal to be presented to TSC. Main Project page: https://launchpad.net/linaro-big-little-system Development ============ 1. big.LITTLE IKS Current IKS snapshot: git://git.linaro.org/landing-teams/working/arm/kernel.git More information: http://lists.linaro.org/pipermail/linaro-dev/2013-May/015882.html 2. big.LITTLE MP There are two branches, which are functionally equivalent - they tweak the scheduler to select the right processes to move to the A15 and try to decrease power consumption while maintaining performance. * A Reference (stable) big.LITTLE MP patchset (merged with linux-linaro): https://git.linaro.org/gitweb?p=arm/big.LITTLE/mp.git;a=shortlog;h=refs/hea… Recommended to be used for testing. Few bugfixes were integrated. * And an upstream (work in progress) big.LITTLE MP patchset: https://git.linaro.org/gitweb?p=arm/big.LITTLE/mp.git;a=shortlog;h=refs/hea… Being worked on in order to achieve the performance/power numbers of the reference one. * Documentation: Code flow is already covered by several LWN articles. See https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/ in the Articles section. We will provide a tuning guide once we have reached agreement upstream. * Automated benchmarking code is ready: - A python script to download LAVA bundle and extract results and populate results on to given Google spreadsheet is being tested. Blueprint Updates ------------------ * https://blueprints.launchpad.net/linaro-big-little-system/+spec/big-little-… Ongoing work. * https://blueprints.launchpad.net/linaro-big-little-system/+spec/small-task-… - New version based on last comments (update more often) is ready, pulled in, waiting for the image to start testing. * https://blueprints.launchpad.net/linaro-big-little-system/+spec/cpu-hot-plu… - Python version is being implemented. - Discussions ongoing on the target latency value for the test (as the latency depends on the load). * https://blueprints.launchpad.net/linaro-big-little-system/+spec/sched-coope… - No resources available (resource is being moved to the other team). - To be discussed on the next OPSCOM. QA == * https://blueprints.launchpad.net/linaro-qa/+spec/prepare-iks-testing-code-t… - Inprogress. - Need to be tested on Samsung board. big.LITTLE MP LAVA Dashboard http://validation.linaro.org/lava-server/dashboard/image-reports/linaro-and… Testing (week 20): sched_tests.git #Cases #Run Pass Fail Absolute pass rate Regression 20 19 19 0 100 % mpbasicsuite 14 10 10 0 100 % mpcoresuite 10 6 6 0 100 % mpextendedsuite 20 10 7 3 70 % mploadbalance 2 2 2 0 100 % http://lists.linaro.org/pipermail/linaro-dev/2013-May/016006.html Bugs: https://bugs.launchpad.net/linaro-big-little-system/+bugs?field.tag=bl-mp Highlight: Bug 1166246 - Lockup on post 3.9 IKS kernel - set up a dedicated board for long term testing. - testing is ongoing. -- Best Regards, Serge Broslavsky <serge.broslavsky(a)linaro.org> Project Manager, Linaro M: +37129426328 IRC: ototo Skype: serge.broslavsky http://linaro.org | Open source software for ARM SoCs

13 years, 1 month

Hwpacks for OE builds?

by Nicolas Dechesne

hi there, i am aware and familiar with hwpacks that were initially designed and used to generate ubuntu/android Linaro images. however i don't know if hwpacks are being used for OE images nowadays? OE has intrinsic mechanism to generate/construct full images which include machine dependent binaries as well as generic components. So are we still using hwpacks for building OE images somehow or not? Can someone point me to relevant documentation? in the short future i will have to build OE images for a couple of different h/w boards, so i am trying to understand the process to do that a-la Linaro. thanks nicolas

13 years, 1 month

[RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver

by Manjunath Goudar

This series of patches begins the process of splitting ohci-hcd up into a core library module and independent pci driver modules. Patch 1/3 prepares the way by exporting a few functions from ohci-hcd and adding a new mechanism for platform-specific drivers to initialize their hc_driver structures. This deserves to be done in the core because almost all of the entries in these structures are pure boilerplate -- practically none of the drivers need to override more than three of the standard core values. Patch 2/3 is part of separating the ohci pci host controller driver from ohci-hcd host code. Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file and EXPORTed, this is part of the effort to move the ohci pci related code to generic pci code. Patch 3/3 separate out ohci-pci into independent driver modules. Manjunath Goudar (3): USB: OHCI: prepare to make ohci-hcd a library module USB: OHCI: Generic changes to make ohci-pci a separate driver USB: OHCI: make ohci-pci a separate driver drivers/usb/host/Kconfig | 4 +- drivers/usb/host/Makefile | 3 + drivers/usb/host/ohci-hcd.c | 129 +++++++++++++++++++++++++--------- drivers/usb/host/ohci-hub.c | 1 - drivers/usb/host/ohci-pci.c | 152 ++++++++++++----------------------------- drivers/usb/host/ohci-q.c | 8 ++- drivers/usb/host/ohci.h | 21 ++++++ drivers/usb/host/pci-quirks.c | 14 ++++ drivers/usb/host/pci-quirks.h | 3 + 9 files changed, 189 insertions(+), 146 deletions(-) -- 1.7.9.5

13 years, 1 month

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