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obsidian-notes/3Resources/游戏开发/性能优化/并行计算/GPU/SIMT.md
2025-09-30 10:01:57 +08:00

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---
tags:
- SIMT
- 多线程
---
单指令多线程
一个指令 会有多条线程运行相同的指令
英伟达会给出多个修饰符,例如:Bit Mask可以指定哪些线程干活 哪些空转,既可支持分支操作
每个线程会进入锁步(lock-step)
线程会进入被遮掩(be masked out)
被遮掩的原因例如if(false) 或者循环次数不一致