hanyangl5
commented
2 years ago there are two multihreading ways in Vulkan and DirectX12
multithread render passes/pass(scene)-based
cannot scale performance with cpu core counts liminited multithreading overhead due to small amount of thread sync and cmd submisiion
multihread draw calls/chunck based
this method can achieve the best performance due to good thread load balancing and multi-core performance scalability. but more thread jobs means more sync operation and submission per frame.
make the most of multicore to improve performance in all cases
Horizon
In horizon, we multihread the passes and draw calls.
resources:
fiber & jobsystem
https://www.gdcvault.com/play/1012321/Task-based-Multithreading-How-to https://gdcvault.com/play/1022186/Parallelizing-the-Naughty-Dog-Engine
impl
https://codereview.stackexchange.com/questions/158739/task-based-multithreading-library-implemented-using-fibers https://github.com/RichieSams/FiberTaskingLib https://wickedengine.net/2018/11/24/simple-job-system-using-standard-c/