[Release-2.2.x] Use max clock for analytical calculations of peak flops#2870
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malfet merged 1 commit intotriton-lang:release/2.2.xfrom Jan 3, 2024
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…2801) By reading the current clock, our analytical calculations can vary while we're evaluating different configs. It turns out the choice of config is very sensitive to the clock, such that a slight throttling can make us reject very good configs, in favor of very bad ones. A reproducer can be found here: https://gist.github.com/bertmaher/8ff5e9631666846fff55d81326cacb4d ``` $ python thermal_throttle.py chosen config BLOCK_M: 128, BLOCK_N: 256, BLOCK_K: 32, SPLIT_K: 1, num_warps: 8, num_ctas: 1, num_stages: 3, enable_warp_specialization: False, enable_persistent: False tflops/s: 107.92460196062149 $ python thermal_throttle.py --preheat chosen config BLOCK_M: 32, BLOCK_N: 32, BLOCK_K: 32, SPLIT_K: 1, num_warps: 2, num_ctas: 1, num_stages: 6, enable_warp_specialization: False, enable_persistent: False tflops/s: 39.29629633970286 ```
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…ps (triton-lang#2870) By reading the current clock, our analytical calculations can vary while we're evaluating different configs. It turns out the choice of config is very sensitive to the clock, such that a slight throttling can make us reject very good configs, in favor of very bad ones. A reproducer can be found here: https://gist.github.com/bertmaher/8ff5e9631666846fff55d81326cacb4d ``` $ python thermal_throttle.py chosen config BLOCK_M: 128, BLOCK_N: 256, BLOCK_K: 32, SPLIT_K: 1, num_warps: 8, num_ctas: 1, num_stages: 3, enable_warp_specialization: False, enable_persistent: False tflops/s: 107.92460196062149 $ python thermal_throttle.py --preheat chosen config BLOCK_M: 32, BLOCK_N: 32, BLOCK_K: 32, SPLIT_K: 1, num_warps: 2, num_ctas: 1, num_stages: 6, enable_warp_specialization: False, enable_persistent: False tflops/s: 39.29629633970286 ``` Cherry-pick of triton-lang#2801 into release/2.2.x
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By reading the current clock, our analytical calculations can vary while we're evaluating different configs. It turns out the choice of config is very sensitive to the clock, such that a slight throttling can make us reject very good configs, in favor of very bad ones.
A reproducer can be found here:
https://gist.github.com/bertmaher/8ff5e9631666846fff55d81326cacb4d