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[do not merge] Register stealing #3566

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[do not merge] Register stealing #3566

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3 changes: 3 additions & 0 deletions __tmp_kernel_none_f0_c0_r0_g0.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -11344,6 +11344,7 @@ __global__ void __cluster_dims__(2, 1, 1) nvfuser_none_f0_c0_r0_g0(Tensor<__half
}
__syncthreads();
if ((((nvfuser_index_t)threadIdx.y) == 2)) {
asm volatile("{setmaxnreg.dec.sync.aligned.u32 56; \n\t}");
if ((Hopper::electSync(4294967295U) && b16)) {
#pragma unroll 4
for(nvfuser_index_t i24 = 0; i24 < i3; ++i24) {
Expand All @@ -11368,11 +11369,13 @@ __global__ void __cluster_dims__(2, 1, 1) nvfuser_none_f0_c0_r0_g0(Tensor<__half
}
}
}
return;
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@zasdfgbnm zasdfgbnm Dec 11, 2024 •
edited
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Note: This return is super important, without this, our perf will be 4% of cuBLAS.

 Time (%)  Total Time (ns)  Instances  Avg (ns)   Med (ns)   Min (ns)  Max (ns)  StdDev (ns)                                                  Name

 --------  ---------------  ---------  ---------  ---------  --------  --------  -----------  ----------------------------------------------------------------------------------------------------
     89.5          2213806          1  2213806.0  2213806.0   2213806   2213806          0.0  <unnamed>::nvfuser_none_f0_c0_r0_g0(<unnamed>::Tensor<<unnamed>::__half, (int)3, (int)3>, <unnamed>…
      3.6            87935          1    87935.0    87935.0     87935     87935          0.0  nvjet_hsh_256x128_64x4_1x2_h_bz_coopA_NTT

} else {
#pragma unroll
for(nvfuser_index_t i31 = 0; i31 < 4; ++i31) {
mbarrier::arrive(toSmem((&T8[(i31 + 4LL)])));
}
asm volatile("{setmaxnreg.inc.sync.aligned.u32 224; \n\t}");
#pragma unroll 4
for(nvfuser_index_t i32 = 0; i32 < i3; ++i32) {
nvfuser_index_t i33;
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