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Richard Purdie
af04a52bf7
I'm not sure what possesed me when I wrote this code originally but its indirection of everyting to use numeric IDs and position dependent lists is horrific. Given the way python internals work, its completely and utterly pointless from performance perspective. It also makes the code hard to understand and debug since any numeric ID has to be translated into something human readable. The hard part is that the IDs are infectous and spread from taskdata into runqueue and even partly into cooker for the dependency graph processing. The only real way to deal with this is to convert everything to use a more sane data structure. This patch: * Uses "<fn>:<taskname>" as the ID for tasks rather than a number * Changes to dict() based structures rather than position dependent lists * Drops the build name, runtime name and filename ID indexes On the most part there shouldn't be user visible changes. Sadly we did leak datastructures to the setscene verify function which has to be rewritten. To handle this, the variable name used to specifiy the version changes from BB_SETSCENE_VERIFY_FUNCTION to BB_SETSCENE_VERIFY_FUNCTION2 allowing multiple versions of bitbake to work with suitably written metadata. Anyone with custom schedulers may also need to change them. I believe the benefits in code readability and easier debugging far outweigh those issues though. It also means we have a saner codebase to add multiconfig support on top of. During development, I did have some of the original code coexisting with the new data stores to allow comparision of the data and check it was working correcty, particuarly for taskdata. I have also compared task-depends.dot files before and after the change. There should be no functionality changes in this patch, its purely a data structure change and that is visible in the patch. (Bitbake rev: 2c88afb60da54e58f555411a7bd7b006b0c29306) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
====
Poky is an integration of various components to form a complete prepackaged
build system and development environment. It features support for building
customised embedded device style images. There are reference demo images
featuring a X11/Matchbox/GTK themed UI called Sato. The system supports
cross-architecture application development using QEMU emulation and a
standalone toolchain and SDK with IDE integration.
Additional information on the specifics of hardware that Poky supports
is available in README.hardware. Further hardware support can easily be added
in the form of layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as
BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information
e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a
reference manual which can be found at:
http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions
of OpenEmbedded. It is distro-less (can build a functional image with
DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website:
http://www.openembedded.org/
Where to Send Patches
=====================
As Poky is an integration repository (built using a tool called combo-layer),
patches against the various components should be sent to their respective
upstreams:
bitbake:
Git repository: http://git.openembedded.org/bitbake/
Mailing list: bitbake-devel@lists.openembedded.org
documentation:
Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/
Mailing list: yocto@yoctoproject.org
meta-poky, meta-yocto-bsp:
Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto(-bsp)
Mailing list: poky@yoctoproject.org
Everything else should be sent to the OpenEmbedded Core mailing list. If in
doubt, check the oe-core git repository for the content you intend to modify.
Before sending, be sure the patches apply cleanly to the current oe-core git
repository.
Git repository: http://git.openembedded.org/openembedded-core/
Mailing list: openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of
oe-core and poky-specific files.