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ggml: fix CUDA grid launch condition for large block_nums.y in binbcast #16742

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Merged
merged 3 commits into from
Oct 24, 2025
Merged

ggml: fix CUDA grid launch condition for large block_nums.y in binbcast #16742

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c0c1a0e
Fix CUDA grid launch condition for large block_nums.y
leejet Oct 23, 2025
d28bb87
add backend ops test
leejet Oct 23, 2025
62ae943
reduce test repetitions
leejet Oct 24, 2025
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2 changes: 1 addition & 1 deletion ggml/src/ggml-cuda/binbcast.cu
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Expand Up @@ -272,7 +272,7 @@ static void launch_bin_bcast_pack(const ggml_tensor * src0, const ggml_tensor *
const uint3 ne12 = init_fastdiv_values((uint32_t) cne1[2]);
const uint3 ne13 = init_fastdiv_values((uint32_t) cne1[3]);

if (block_nums.z > 65535) {
if (block_nums.z > 65535 || block_nums.y > 65535) {
int block_num = (ne0 * ne1 * ne2 * ne3 + block_size - 1) / block_size;
const uint3 prod_012 = init_fastdiv_values((uint32_t) (ne0 * ne1 * ne2));
const uint3 prod_01 = init_fastdiv_values((uint32_t) (ne0 * ne1));
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1 change: 1 addition & 0 deletions tests/test-backend-ops.cpp
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Expand Up @@ -6407,6 +6407,7 @@ static std::vector<std::unique_ptr<test_case>> make_test_cases_eval() {
add_test_bin_bcast(type, {1, 1, 640, 1}, {32, 32, 1, 1});
add_test_bin_bcast(type, {5120, 1, 1, 1}, {1, 256, 1, 1});
add_test_bin_bcast(type, {640, 1, 1, 1}, {1, 1, 1, 1});
add_test_bin_bcast(type, {64, 262144, 1, 1}, {1, 1, 1, 1});
//add_test_bin_bcast(type, {3, 3, 2560, 1280}, {1, 1, 1, 1});
//add_test_bin_bcast(type, {3, 3, 2560, 1280}, {2, 1, 1, 1});
}
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