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The CUDA Handbook: A Comprehensive Guide to GPU Programming by Nicholas Wilt

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Chapter 8. Streaming Multiprocessors

The streaming multiprocessors (SMs) are the part of the GPU that runs our CUDA kernels. Each SM contains the following.

• Thousands of registers that can be partitioned among threads of execution

• Several caches:

Shared memory for fast data interchange between threads

Constant cache for fast broadcast of reads from constant memory

Texture cache to aggregate bandwidth from texture memory

L1 cache to reduce latency to local or global memory

Warp schedulers that can quickly switch contexts between threads and issue instructions to warps that are ready to execute

• Execution cores for integer and floating-point operations:

– Integer and single-precision floating point operations

– Double-precision floating ...

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