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Update architecture.md 

Signed-off-by: Luca Fulchir <luca.fulchir@runesauth.com>
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Luca Fulchir 2023-05-27 11:10:29 +02:00
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@ -1,8 +1,17 @@
# Architecture
For now we will keep things as easy as possible, not caring about the performance.
The current architecture is based on tokio.
In the future we might want something more general purpose (and no-std),
but good enough for now.
This means we will use only ::tokio and spawn one job per connection
Tokio has its own thread pool, and we spawn one async loop per listening socket.
Then we spawn our own thread pool.
These threads are pinned to the cpu cores.
We spawn one async worker per thread, making sure it remains pinned to that core.
This is done to avoid *a lot* of locking and multithread syncronizations.
We do connection sharding on the connection id.
# Future
@ -12,8 +21,6 @@ scaling and work queues:
https://tokio.rs/blog/2019-10-scheduler
What we want to do is:
* one thread per core
* thread pinning
* ebpf BBR packet pacing
* need to support non-ebpf BBR for mobile ios, too
* connection sharding