Function receiveArrayToGpuBuffer

quest/src/comm/comm_routines.cpp:470–491

void receiveArrayToGpuBuffer(Qureg qureg, qindex numElems, int pairRank) {

    qindex recvInd = getBufferRecvInd();

    // receive to GPU memory directly if possible
    if (gpu_isDirectGpuCommPossible()) {

        // GPU synchronisation is not necessary; we're merely receiving to buffer

        // communicate via GPUDirect or Peer-to-Peer
        receiveArray(&qureg.gpuCommBuffer[recvInd], numElems, pairRank);

    // otherwise, route through CPU
    } else {

        // receive array to CPU memory (buffer), at offset
        receiveArray(&qureg.cpuCommBuffer[recvInd], numElems, pairRank);

        // copy CPU memory (buffer) to GPU memory (buffer), at offset
        gpu_copyCpuToGpu(qureg, &qureg.cpuCommBuffer[recvInd], &qureg.gpuCommBuffer[recvInd], numElems);
    }
}