ck_tile kernel for gemm with groupwise quantized A or B tensor. #2362
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This change introduces new pipelines with Intrawave scheduler and block gemm primitives that loads the scale tensor to registers to perform dequantization post MFMA on C tensor in registers. Scale tensor data, AQ/BQ is spliced across threads in registers and not stored in LDS. Current support is for the following combinations, but it should be fairly straightforward to extend support to more formats. 1. fp8, fp8 -> f32 2. bf8, bf8 -> f32 3. i4, fp8 -> f32 4. i4, bf8 -> f32 Group size can go down to as low as K length of underlying WarpGemm primitive. For Gemm problems with quantized B tensor, this change also introduces preliminary support for flatmm pipeline which loads B tensor directly into registers.
vj-krish
requested review from
illsilin,
carlushuang,
qianfengz,
aosewski,
poyenc,
geyyer,
bartekxk,
andriy-ca,
afagaj,
asleepzzz,
tenpercent,
ThomasNing and
coderfeli
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|
@vj-krish Thank you Vijay! Will take a look. |
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This change introduces new pipelines with Intrawave scheduler and block gemm primitives that loads the scale tensor to registers to perform dequantization post MFMA on C tensor in registers.
Scale tensor data, AQ/BQ is spliced across threads in registers and not stored in LDS.
Current support is for the following combinations, but it should be fairly straightforward to extend support to more formats.
Group size can go down to as low as K length of underlying WarpGemm primitive.
For Gemm problems with quantized B tensor, this change also introduces preliminary support for flatmm pipeline which loads B tensor directly into registers.
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