increase p2p channels for Intel platform (#1448)

Co-authored-by: hujingbo <hujingbo@kuaishou.com>

src/graph/paths.cc

@@ -899,8 +899,8 @@ ncclResult_t ncclTopoComputeP2pChannels(struct ncclComm* comm) {
   NCCLCHECK(ncclTopoCpuType(comm->topo, &arch, &vendor, &model));
   if (arch == NCCL_TOPO_CPU_ARCH_X86 && vendor == NCCL_TOPO_CPU_VENDOR_INTEL && !(comm->topo->type & RCCL_TOPO_XGMI_ALL)) {
     // Adjust P2P channels on Intel platform
-    comm->p2pnChannelsPerPeer = 1;
-    comm->p2pnChannels = 2;
+    comm->p2pnChannelsPerPeer = 8;
+    comm->p2pnChannels = 8;
   } 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)) {
     // Adjust P2P channels on Rome
     comm->p2pnChannelsPerPeer = 2;