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"deploy/hubserving/ocr_cls/module.py" did not exist on "f09d1f730b71a9b220cceec14a765c24cd9c1d6f"
Commit 9ee0ff1d authored by Tri Dao's avatar Tri Dao
Browse files

Fix using dO stride for O, which can cause memory error in bwd

parent 2dd87d06
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Inline Side-by-side
Showing with 4 additions and 4 deletions
csrc/flash_attn/src/flash_bwd_kernel.h
View file @ 9ee0ff1d
......@@ -141,7 +141,7 @@ inline __device__ void compute_dot_do_o(const Params &params) {
make_stride(params.do_row_stride, _1{}));
Tensor gO = make_tensor(make_gmem_ptr(reinterpret_cast<Element *>(params.o_ptr) + row_offset_o),
Shape<Int<kBlockM>, Int<kHeadDim>>{},
make_stride(params.do_row_stride, _1{}));
make_stride(params.o_row_stride, _1{}));
Tensor gdQaccum = make_tensor(make_gmem_ptr(reinterpret_cast<ElementAccum *>(params.dq_accum_ptr) + row_offset_dq_accum),
Shape<Int<kBlockM>, Int<kHeadDim>>{}, Stride<Int<kHeadDim>, _1>{});
Tensor dP_sum = make_tensor(make_gmem_ptr(reinterpret_cast<ElementAccum *>(params.dsoftmax_sum) + row_offset_dpsum),
......@@ -474,7 +474,7 @@ inline __device__ void compute_dq_dk_dv_1colblock(const Params &params, const in
make_stride(params.do_row_stride, _1{}));
Tensor gO = make_tensor(make_gmem_ptr(reinterpret_cast<Element *>(params.o_ptr) + row_offset_o),
Shape<Int<kBlockM>, Int<kHeadDim>>{},
make_stride(params.do_row_stride, _1{}));
make_stride(params.o_row_stride, _1{}));
Tensor gdQ = make_tensor(make_gmem_ptr(reinterpret_cast<Element *>(params.dq_ptr) + row_offset_dq),
Shape<Int<kBlockM>, Int<kHeadDim>>{},
make_stride(params.dq_row_stride, _1{}));
......@@ -1098,7 +1098,7 @@ inline __device__ void compute_dq_dk_dv_1rowblock(const Params &params, const in
const index_t row_offset_do = binfo.q_offset(params.do_batch_stride, params.do_row_stride, bidb)
+ m_block * kBlockM * params.do_row_stride + bidh * params.do_head_stride;
const index_t row_offset_o = binfo.q_offset(params.o_batch_stride, params.o_row_stride, bidb)
+ m_block * kBlockM * params.do_row_stride + bidh * params.o_head_stride;
+ m_block * kBlockM * params.o_row_stride + bidh * params.o_head_stride;
// We'll advance gdKaccum and gdVaccum before the first write.
const index_t row_offset_dkv_accum = ((bidb * params.h_k + (bidh / params.h_h_k_ratio)) * params.seqlen_k_rounded
+ n_block_max * kBlockN) * params.d_rounded;
......@@ -1119,7 +1119,7 @@ inline __device__ void compute_dq_dk_dv_1rowblock(const Params &params, const in
make_stride(params.do_row_stride, _1{}));
Tensor gO = make_tensor(make_gmem_ptr(reinterpret_cast<Element *>(params.o_ptr) + row_offset_o),
Shape<Int<kBlockM>, Int<kHeadDim>>{},
make_stride(params.do_row_stride, _1{}));
make_stride(params.o_row_stride, _1{}));
Tensor gdKaccum = make_tensor(make_gmem_ptr(reinterpret_cast<ElementAccum *>(params.dk_accum_ptr) + row_offset_dkv_accum),
Shape<Int<kBlockN>, Int<kHeadDim>>{},
Stride<Int<kHeadDim>, _1>{});
......
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