Adjust P2P channels on Intel platform (#653)
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@@ -814,7 +814,13 @@ ncclResult_t ncclTopoComputeP2pChannels(struct ncclComm* comm) {
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}
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}
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if (comm->topo->nodes[GPU].count == comm->topo->nRanks && (comm->topo->type & RCCL_TOPO_4P2H_ROME) && !(comm->topo->type & RCCL_TOPO_GDR_ALL) && !(comm->topo->type & RCCL_TOPO_XGMI_ALL)) {
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int arch, vendor, model;
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NCCLCHECK(ncclTopoCpuType(comm->topo, &arch, &vendor, &model));
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if (arch == NCCL_TOPO_CPU_ARCH_X86 || vendor == NCCL_TOPO_CPU_VENDOR_INTEL) {
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// Adjust P2P channels on Intel platform
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comm->p2pnChannelsPerPeer = 1;
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comm->p2pnChannels = 2;
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} else if (comm->topo->nodes[GPU].count == comm->topo->nRanks && (comm->topo->type & RCCL_TOPO_4P2H_ROME) && !(comm->topo->type & RCCL_TOPO_GDR_ALL) && !(comm->topo->type & RCCL_TOPO_XGMI_ALL)) {
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// Adjust P2P channels on Rome
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comm->p2pnChannelsPerPeer = 2;
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comm->p2pnChannels = 2;
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