commit | 17936325de410587479ccd7bcfe3538acb1cf5de | [log] [tgz] |
---|---|---|
author | Corey Tabaka <eieio@google.com> | Tue Jan 22 17:06:45 2019 -0800 |
committer | Corey Tabaka <eieio@google.com> | Tue Jan 22 17:06:45 2019 -0800 |
tree | fbc4334e2db38a88c87f80c5ce77a4476e013430 | |
parent | 1a183b77ea9eda9922486c055b1fb14076d68940 [diff] |
[kernel] Initial implementation of fair scheduler. Add a fair scheduler option that is API compatible with the current kernel/sched API. The algorithm is similar to WFQ/EEVDF/CFS and provides weight-based bandwidth allocation with bounded delay for all competing tasks. Bug: ZX-2885 Test: zircon_benchmarks, k spinners, and extensive tracing. More TBD. Change-Id: Ife693073a076aa0e7cac8bbd834823035a4950a4
Zircon is the core platform that powers the Fuchsia OS. Zircon is composed of a microkernel (source in kernel/...) as well as a small set of userspace services, drivers, and libraries (source in system/...) necessary for the system to boot, talk to hardware, load userspace processes and run them, etc. Fuchsia builds a much larger OS on top of this foundation.
The canonical Zircon Git repository is located at: https://fuchsia.googlesource.com/zircon
A read-only mirror of the code is present at: https://github.com/fuchsia-mirror/zircon
The Zircon Kernel provides syscalls to manage processes, threads, virtual memory, inter-process communication, waiting on object state changes, and locking (via futexes).
Currently there are some temporary syscalls that have been used for early bringup work, which will be going away in the future as the long term syscall API/ABI surface is finalized. The expectation is that there will be about 100 syscalls.
Zircon syscalls are generally non-blocking. The wait_one, wait_many port_wait and thread sleep being the notable exceptions.
This page is a non-comprehensive index of the zircon documentation.