wfe | R package provides a computationally efficient way

The problem is that your price and program models are not directly related to your user model. If you consider the relations it is like price -> package -> user, so you will have to get those relations in the package serializer instead like this

serializers.py

The QEMU -kernel option treats the file it loads differently depending on whether it is an ELF file or not.

If it is an ELF file, it is loaded according to what the ELF file says it should be loaded as, and started by executing from the ELF entry point. If it is not an ELF file, it is assumed to be a Linux kernel, and started in the way that the Linux kernel's booting protocol requires.

In particular, for a multi-core board, if -kernel gets an ELF file it starts all the cores at once at the entry point. If it gets a non-ELF file then it will do whatever that hardware is supposed to do for loading a Linux kernel. For raspi3b this means emulating the firmware behaviour of "secondary cores sit in a loop waiting for the primary core to release them by writing to a 'mailbox' address. This is the behaviour you're seeing in gdb -- the 0x300 address that cores 1-3 are at is in the "spin in a loop waiting" code.

In general, unless your guest code is a Linux kernel or is expecting to be booted in the same way as a Linux kernel, don't use the -kernel option to load it. -kernel is specifically "try to do what Linux kernels want", and it also tends to have a lot of legacy "this seemed like a useful thing to somebody" behaviour that differs from board to board or between different guest CPU architectures. The "generic loader" is a good way to load ELF files if you want complete manual control for "bare metal" work.

For more info on the various QEMU options for loading guest code, see this answer.

You probably have an issue with the versions of gdb or qemu you are using, since I was not able to reproduce your problem with a version 10.1 of aarch64-elf-gdb and a version 6.2.0 of qemu-system-aarch64 compiled from scratch on an Ubuntu 20.04.3 LTS system:

wfe.s:

Alignment faults can be configured to fault or no-fault for accesses to Normal memory only by setting SCTLR_ELx.A bit. Unaligned access to "Device" memory cannot be configured and will always cause fault if address is unaligned. In MMU On configuration, Device or Normal memory type can be configured by programming appropriate bits in MAIR_ELx and translation system takes care of assigning these properties to memory. In case of MMU off, translation system assigns Device-nGnRnE attribute for data accesses and assigns Normal memory attribute for instruction access. In your case you are running in MMU off configuration, translation system assigns Device-nGnRnE attribute and so the fault. Refer VMSA (Chapter 5, section D5.2.9) in Arm Arm for more details.

First: Both if statements haven't exactly the same structure:

• in the first you load a script named like the editor but with a wf before: '/src/js/editor/wfeditorjs.js' but in the second you do it without: '/src/js/editor/trumbowyg.js'
• in the second if statement you are additionally loading a css file: $.loadCSS('/src/libs/css/trumbowyg.min.css');

If both if statement have exactly the same structure and the called function doesn't use the editor name in camelCase (f.e. initWfeditorjs instead of initWfEditorJS) you could just save an array with the editor names and loop over them in a for-loop.

In that loop you could "build" your selector- and src-strings by concatenation with the editor name, for example $('.wfe-' + editors[i]), and call the function with: window['yourFunctionName'](your_function_param), for example window['initWf' + editors[i]](reScann).

Furthermore: You don't need to pass a variable to the anonymous function if that variable is declared globally like your reScann variable.

Example:

Here's a start at a tidy method:

WFE sets the processor to standby until the next interrupt (or event). So even though you refresh the watchdog, the processor goes to sleep immediately after that and in the absence of any other events, stays in that state until the watchdog expires and resets the processor. To prevent that, you will need something that periodically triggers an interrupt (like an empty timer that the manufacturer suggests) to ensure the processor wakes up and resumes execution, thereby also refreshing the watchdog.

The timer interval should be something reasonably close to, but much less than, the watchdog timeout to ensure you get the ideal mix of power-saving and reliability.

(Moved my comments to an answer, since the OP says it works for him.)

Accoring to Maven repository, this version of the hibernate-search is compatible with avro versions 1.7.6-1.9.2.

I'm curious where you get your information from. Hibernate Search uses Avro 1.7.6 and definitely hasn't been upgrated to 1.9, or even tested with that version.

There's a pending PR regarding this upgrade here, but it's currently stalled due to concerns regarding backward compatibility: we don't want to break compatibility in a micro version, and the next major version (Hibernate Search 6) simply doesn't use Avro.

Regarding the solution... If you're stuck with Hibernate Search 5.5, you're probably out of luck as it's no longer maintained on the community side. Some (commercial) vendors might still provide updates.

If you can upgrade to Hibernate Search 5.11, maybe you could try building Hibernate Search from this code and using it in your application.

For the part of CMSIS your are referring to, some is supplied by ARM (CMSIS core) and some is supplied by your chip vendor (Device Family Pack). As you have discovered, CMSIS software packs are just zip files by another name. You may unzip them wherever you wish. As you are aware, core CMSIS and most of the vendor specific part consists of just header files. It is then necessary to include the proper directories in the compiler include path, typically using -I... command line options.

One type of vendor software pack is called a Device Family Pack. In addition to vendor specific peripheral definitions, they usually contain start up code and often times linker scripts that match the layout of the SOC memory. These are worth finding and will save the work of vector table layout and other such low level code.

For the bonus: Keil is a maker of software tools and is owned by ARM. The nicer features of CMSIS software packs, like distributing and updating them over a network, are supported by the Keil IDE and Keil maintains a repository of common SOC packs. I also usually use the GNU compiler, but have used Keil and its built-in CMSIS awareness and software pack availablity to good effect. I have even built a few software packs for custom work. I suggest a continued reading of the CMSIS documentation paying some attention to the section on packs. You don't have to have an IDE that manages the packs for you. Since they are simply zip files, you undertake that task yourself.