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hujun5 ed998c08c4 sched: change the SMP scheduling policy from synchronous to asynchronous 
reason:
Currently, if we need to schedule a task to another CPU, we have to completely halt the other CPU,
manipulate the scheduling linked list, and then resume the operation of that CPU. This process is both time-consuming and unnecessary.

During this process, both the current CPU and the target CPU are inevitably subjected to busyloop.

The improved strategy is to simply send a cross-core interrupt to the target CPU.
The current CPU continues to run while the target CPU responds to the interrupt, eliminating the certainty of a busyloop occurring.

Signed-off-by: hujun5 <hujun5@xiaomi.com>
2024-10-09 23:32:31 +08:00
.github build.yml: Check out the correct branch of nuttx-apps 2024-10-09 19:30:38 +08:00
arch sched: change the SMP scheduling policy from synchronous to asynchronous 2024-10-09 23:32:31 +08:00
audio vfs/file: add reference counting to prevent accidental close during reading writing... 2024-09-17 12:01:53 +08:00
binfmt modlib/dlfcn:unify same code 2024-10-08 23:51:33 +08:00
boards irq: use up_interrupt_context to replace up_current_regs 2024-10-09 18:16:43 +08:00
cmake modify BUILD_LOADABLE to MODULES which backwards-compatible Kernel 2024-09-19 08:32:03 +08:00
crypto nuttx/atomic.h:fix Fixed the pragma of ATOMIC_VAR_INIT in clang 2024-09-23 14:07:03 +08:00
Documentation Doc/ioexpand: add descriptions about ioexpander 2024-10-03 09:06:04 +08:00
drivers math: remove is_power_of_2() keep IS_POWER_OF_2() 2024-10-08 23:50:47 +08:00
dummy build: add initial cmake build system 2023-07-08 13:50:48 +08:00
fs fs/chmod/fchmod/lchmod: only set permissions by mode_t and ignore other bits 2024-09-23 14:57:37 +08:00
graphics Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
include sched: change the SMP scheduling policy from synchronous to asynchronous 2024-10-09 23:32:31 +08:00
libs sim: add windows64 setjmp/longjmp support 2024-10-08 23:51:33 +08:00
mm mm/kasan: Kasan global support setting alignment length 2024-09-20 21:47:23 +08:00
net local_sock: fix accept use-after-free 2024-10-09 23:00:32 +08:00
openamp Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
pass1 Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
sched sched: change the SMP scheduling policy from synchronous to asynchronous 2024-10-09 23:32:31 +08:00
syscall fs/mmap/msync:support msync. 2024-09-19 01:43:50 +08:00
tools gdb plugin: Encapsulate the gdb native command gcore as nxgcore 2024-09-20 22:07:29 +08:00
video Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
wireless Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
.asf.yaml feat: add a GitHub action to lint the YAML files 2020-12-15 09:52:04 -06:00
.gitignore add .gdb_history to .gitignore 2024-09-14 12:14:12 +08:00
.pre-commit-config.yaml Created pre-commit config file 2024-08-19 21:40:56 +02:00
.yamllint feat: add a GitHub action to lint the YAML files 2020-12-15 09:52:04 -06:00
AUTHORS AUTHORS: add Tomek CEDRO to the list 2023-03-07 14:15:55 +01:00
CMakeLists.txt sim: add link option /LARGEADDRESSAWARE:NO for windows64 2024-10-08 23:51:33 +08:00
CONTRIBUTING.md Remove the tail spaces from all files except Documentation 2023-02-26 13:24:24 -08:00
INVIOLABLES.md INVIOLABLES.md: Fix a simple alignment and change occurrences of Nuttx 2020-09-03 01:33:05 +08:00
Kconfig Add thermal framework 2024-09-23 08:57:29 +08:00
LICENSE libc/x86_64: port string functions from bionic 2024-07-02 23:59:18 +08:00
Makefile tools: migrate to SPDX identifier 2024-09-10 23:11:11 +08:00
NOTICE Remove the double blank line from source files 2022-02-20 20:10:14 +01:00
README.md Gathering community recommendations 2023-10-28 13:55:56 +08:00
ReleaseNotes Documentation: move ReleaseNotes 2023-09-26 20:41:00 +08:00

README.md

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Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.

Getting Started

First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.

Documentation

You can find the current NuttX documentation on the Documentation Page.

Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.

The old NuttX documentation is still available in the Apache wiki.

Supported Boards

NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.

Contributing

If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.

License

The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.