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85e8017535
Co-authored-by: Pratyush Patel <pratyushpatel.1995@gmail.com> Co-authored-by: Esha Choukse <eschouks@microsoft.com> Co-authored-by: Changho Hwang <changhohwang@microsoft.com>
29 lines
1.1 KiB
Plaintext
29 lines
1.1 KiB
Plaintext
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT license.
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#include <mscclpp/sm_channel_device.hpp>
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// be careful about using channels[my_rank] as it is inavlie and it is there just for simplicity of indexing
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extern "C" __global__ void __launch_bounds__(1024, 1)
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sm_channel(mscclpp::SmChannelDeviceHandle* channels, int my_rank, int nranks, int num_elements, int use_packet) {
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int tid = threadIdx.x;
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int bid = blockIdx.x;
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uint64_t size_per_rank = (num_elements * sizeof(int)) / nranks;
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uint64_t my_offset = size_per_rank * my_rank;
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uint64_t my_nghr_offset = size_per_rank * bid;
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int flag = 123;
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if (bid < nranks && bid != my_rank) {
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if (use_packet) {
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channels[bid].putPackets(2 * my_offset, my_offset, size_per_rank, tid, blockDim.x, flag);
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channels[bid].getPackets(2 * my_nghr_offset, my_nghr_offset, size_per_rank, tid, blockDim.x, flag);
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} else {
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channels[bid].put(my_offset, my_offset, size_per_rank, tid, blockDim.x);
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__syncthreads();
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if (!use_packet && tid == 0) {
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channels[bid].signal();
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channels[bid].wait();
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}
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}
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}
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}
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