mawei
/
cereal
mirror of https://github.com/commaai/cereal.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Update README.md

This commit is contained in:
Shane Smiskol 2024-06-07 15:37:22 -07:00 committed by GitHub
parent 2ac05eae17
commit 3f82842fbf
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
View File

@ -1,7 +1,7 @@
# MSGQ: A lock free single producer multi consumer message queue
## What is this library?
MSGQ is a generic high performance IPC pub sub system with a single publisher and multiple subscribers. MSGQ is designed to be a high performance replacement for ZMQ-like SUB/PUB patterns. It uses a ring buffer in shared memory to efficiently read and write data. Each read requires a copy. Writing can be done without a copy, as long as the size of the data is known in advance. While MSGQ is the core of this library, this library also allows replacing the MSGQ backend with ZMQ or a spoofed implementation that can be used for deterministic testing. This library also contains visionipc, an IPC system specifically for large continiguous buffers (like images/video).
MSGQ is a generic high performance IPC pub sub system with a single publisher and multiple subscribers. MSGQ is designed to be a high performance replacement for ZMQ-like SUB/PUB patterns. It uses a ring buffer in shared memory to efficiently read and write data. Each read requires a copy. Writing can be done without a copy, as long as the size of the data is known in advance. While MSGQ is the core of this library, this library also allows replacing the MSGQ backend with ZMQ or a spoofed implementation that can be used for deterministic testing. This library also contains visionipc, an IPC system specifically for large contiguous buffers (like images/video).
## Storage
The storage for the queue consists of an area of metadata, and the actual buffer. The metadata contains: