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A comment on The One Billion Row Challenge in CUDA: from 17 minutes to 17 seconds. Parent comment

Re:The One Billion Row Challenge in CUDA: from 17 minutes to... by mandarax8 on Sunday April 14, 2024 @10:23AM (#40031255)
> Atomic operations are limited to 32-bits.

I'm using 64bit atomics at work, are you on an old version of cuda or are some operations only supported on 32bit?

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Re:The One Billion Row Challenge in CUDA: from 17 minutes to... by tspeterkim on Sunday April 14, 2024 @10:35AM (#40031371)
I misspoke. (got confused with the key limit in my link above)

Atomics work up to 128-bits (https://docs.nvidia.com/cuda/cuda-c-programming-guide/#atomi...).

Regardless, it's still less than 100 bytes, which is the max length of city strings.

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