CoreSight

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[PATCH v7 00/10] CoreSight configuration management; ETM strobing

by Mike Leach

This patchset introduces initial concepts in CoreSight system configuration management support. to allow more detailed and complex programming to be applied to CoreSight systems during trace capture. Configurations consist of 2 elements:- 1) Features - programming combinations for devices, applied to a class of device on the system (all ETMv4), or individual devices. 2) Configurations - a set of programmed features used when the named configuration is selected. Features and configurations are declared as a data table, a set of register, resource and parameter requirements. Features and configurations are loaded into the system by the virtual cs_syscfg device. This then matches features to any registered devices and loads the feature into them. Individual device classes that support feature and configuration register with cs_syscfg. Once loaded a configuration can be enabled for a specific trace run. Configurations are registered with the perf cs_etm event as entries in cs_etm/events. These can be selected on the perf command line as follows:- perf record -e cs_etm/<config_name>/ ... This patch set has one pre-loaded configuration and feature. A named "strobing" feature is provided for ETMv4. A named "autofdo" configuration is provided. This configuration enables strobing on any ETM in used. Thus the command: perf record -e cs_etm/autofdo/ ... will trace the supplied application while enabling the "autofdo" configuation on each ETM as it is enabled by perf. This in turn will enable strobing for the ETM - with default parameters. Parameters can be adjusted using configfs. The sink used in the trace run will be automatically selected. A configuration can supply up to 15 of preset parameter values, which will subsitute in parameter values for any feature used in the configuration. Selection of preset values as follows perf record -e cs_etm/autofdo,preset=1/ ... (valid presets 1-N, where N is the number supplied in the configuration, not exceeding 15. preset=0 is the same as not selecting a preset.) Applies to & tested against coresight/next-ETE-TRBE (5.12-rc3 base) Changes since v6: Fixed kernel test robot issues- Reported-by: kernel test robot <lkp(a)intel.com> Changes since v5: 1) Fix code style issues from auto-build reports, as Reported-by: kernel test robot <lkp(a)intel.com> 2) Update comments to get consistent docs for API functions. 3) remove unused #define from autofdo example. 4) fix perf code style issues from patch 4 (Mathieu) 5) fix configfs code style issues from patch 9. (Mathieu) Changes since v4: (based on comments from Matthieu and Suzuki). No large functional changes - primarily code improvements and naming schema. 1) Updated entire set to ensure a consistent naming scheme was used for variables and struct members that refer to the key objects in the system. Suffixes _desc used for all references to feature and configuraion descriptors, suffix _csdev used for all references to load feature and configs in the csdev instances. (Mathieu & Suzuki). 2) Dropped the 'configurations' sub dir in cs_etm perf directories as superfluous with the configfs containing the same information. (Mathieu). 3) Simplified perf handling code (suzuki) 4) Multiple simplifications and improvements for code readability (Matthieu and Suzuki) Changes since v3: (Primarily based on comments from Matthieu) 1) Locking mechanisms simplified. 2) Removed the possibility to enable features independently from configurations.Only configurations can be enabled now. Simplifies programming logic. 3) Configuration now uses an activate->enable mechanism. This means that perf will activate a selected configuration at the start of a session (during setup_aux), and disable at the end of a session (around free_aux) The active configuration and associated features will be programmed into the CoreSight device instances when they are enabled. This locks the configuration into the system while in use. Parameters cannot be altered while this is in place. This mechanism will be extended in future for dynamic load / unload of configurations to prevent removal while in use. 4) Removed the custom bus / driver as un-necessary. A single device is registered to own perf fs elements and configfs. 5) Various other minor issues addressed. Changes since v2: 1) Added documentation file. 2) Altered cs_syscfg driver to no longer be coresight_device based, and moved to its own custom bus to remove it from the main coresight bus. (Mathieu) 3) Added configfs support to inspect and control loaded configurations and features. Allows listing of preset values (Yabin Cui) 4) Dropped sysfs support for adjusting feature parameters on the per device basis, in favour of a single point adjustment in configfs that is pushed to all device instances. 5) Altered how the config and preset command line options are handled in perf and the drivers. (Mathieu and Suzuki). 6) Fixes for various issues and technical points (Mathieu, Yabin) Changes since v1: 1) Moved preloaded configurations and features out of individual drivers. 2) Added cs_syscfg driver to manage configurations and features. Individual drivers register with cs_syscfg indicating support for config, and provide matching information that the system uses to load features into the drivers. This allows individual drivers to be updated on an as needed basis - and removes the need to consider devices that cannot benefit from configuration - static replicators, funnels, tpiu. 3) Added perf selection of configuarations. 4) Rebased onto the coresight module loading set. To follow in future revisions / sets:- a) load of additional config and features by loadable module. b) load of additional config and features by configfs c) enhanced resource management for ETMv4 and checking features have sufficient resources to be enabled. d) ECT and CTI support for configuration and features. Mike Leach (10): coresight: syscfg: Initial coresight system configuration coresight: syscfg: Add registration and feature loading for cs devices coresight: config: Add configuration and feature generic functions coresight: etm-perf: update to handle configuration selection coresight: syscfg: Add API to activate and enable configurations coresight: etm-perf: Update to activate selected configuration coresight: etm4x: Add complex configuration handlers to etmv4 coresight: config: Add preloaded configurations coresight: syscfg: Add initial configfs support Documentation: coresight: Add documentation for CoreSight config .../trace/coresight/coresight-config.rst | 244 ++++++ Documentation/trace/coresight/coresight.rst | 16 + drivers/hwtracing/coresight/Makefile | 7 +- .../hwtracing/coresight/coresight-cfg-afdo.c | 153 ++++ .../coresight/coresight-cfg-preload.c | 31 + .../coresight/coresight-cfg-preload.h | 13 + .../hwtracing/coresight/coresight-config.c | 275 ++++++ .../hwtracing/coresight/coresight-config.h | 253 ++++++ drivers/hwtracing/coresight/coresight-core.c | 12 +- .../hwtracing/coresight/coresight-etm-perf.c | 150 +++- .../hwtracing/coresight/coresight-etm-perf.h | 12 +- .../hwtracing/coresight/coresight-etm4x-cfg.c | 182 ++++ .../hwtracing/coresight/coresight-etm4x-cfg.h | 30 + .../coresight/coresight-etm4x-core.c | 38 +- .../coresight/coresight-etm4x-sysfs.c | 3 + .../coresight/coresight-syscfg-configfs.c | 396 +++++++++ .../coresight/coresight-syscfg-configfs.h | 45 + .../hwtracing/coresight/coresight-syscfg.c | 804 ++++++++++++++++++ .../hwtracing/coresight/coresight-syscfg.h | 81 ++ include/linux/coresight.h | 7 + 20 files changed, 2716 insertions(+), 36 deletions(-) create mode 100644 Documentation/trace/coresight/coresight-config.rst create mode 100644 drivers/hwtracing/coresight/coresight-cfg-afdo.c create mode 100644 drivers/hwtracing/coresight/coresight-cfg-preload.c create mode 100644 drivers/hwtracing/coresight/coresight-cfg-preload.h create mode 100644 drivers/hwtracing/coresight/coresight-config.c create mode 100644 drivers/hwtracing/coresight/coresight-config.h create mode 100644 drivers/hwtracing/coresight/coresight-etm4x-cfg.c create mode 100644 drivers/hwtracing/coresight/coresight-etm4x-cfg.h create mode 100644 drivers/hwtracing/coresight/coresight-syscfg-configfs.c create mode 100644 drivers/hwtracing/coresight/coresight-syscfg-configfs.h create mode 100644 drivers/hwtracing/coresight/coresight-syscfg.c create mode 100644 drivers/hwtracing/coresight/coresight-syscfg.h -- 2.17.1

4 years

亚马逊运输报价咨询

by 亚马逊运输报价咨询

  您好    大概有700kg 2方的货到亚马逊仓库，请问你们怎么收费?

4 years

Re: reminder

by Tyler Thomas

4 years

Re: Greetings

by Adrian Cibotariu

4 years

[PATCH v1 0/3] coresight: Fix for snapshot mode

by Leo Yan

This patch series is to correct the pointer usages for the snapshot mode. Patch 01 allows the AUX trace in the free run mode and only syncs the AUX ring buffer when taking snapshot. Patch 02 is to polish code, it removes the redundant header maintained in tmc-etr driver and directly uses pointer perf_output_handle::head. Patch 03 removes the callback cs_etm_find_snapshot() which wrongly calculates the buffer headers; we can simply use the perf's common function __auxtrace_mmap__read() for headers calculation. This patch can be cleanly applied on the mainline kernel with: commit 97e5bf604b7a ("Merge branch 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu") And it has been tested on Arm64 Juno board. Leo Yan (3): coresight: etm-perf: Correct buffer syncing for snapshot coresight: tmc-etr: Use perf_output_handle::head for AUX ring buffer perf cs-etm: Remove callback cs_etm_find_snapshot() .../hwtracing/coresight/coresight-etm-perf.c | 30 +++- .../hwtracing/coresight/coresight-etm-perf.h | 2 + .../hwtracing/coresight/coresight-tmc-etr.c | 10 +- tools/perf/arch/arm/util/cs-etm.c | 133 ------------------ 4 files changed, 32 insertions(+), 143 deletions(-) -- 2.25.1

4 years

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by Foscore Development Center

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4 years

shipping globally

by Jamison Garrett

4 years

Información 2021 FOESCO

by FOESCO

FOESCO informa Abierto el plazo de inscripción de CURSOS BONIFICABLES E-LEARNING dirigidos a empleados en activo o en situación de ERTE (Convocatoria JULIO 2021) Plazo de inscripción hasta el 30 de Junio Adjuntamos PDF con el listado de cursos disponibles. Para más información por favor respondan a este mismo correo electrónico o bien llamen al teléfono 910323794. Saludos cordiales. FOESCO Formación Estatal Continua. Departamento de Formación Bonificable. Tel: 910 323 794 (Horario de 9h a 15h y de 17h a 20h de Lunes a Viernes)

4 years

design idea with ergonomics

by Harley George

4 years

カード情報更新のお知らせ

by 楽天市場

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4 years

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