device_nccl.c

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/*
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 All rights reserved.
 
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 are met:
 
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   * Redistributions in binary form must reproduce the above
     copyright notice, this list of conditions and the following
     disclaimer in the documentation and/or other materials provided
     with the distribution.
 
   * Neither the name of the authors nor the names of its
     contributors may be used to endorse or promote products derived
     from this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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*/
 
#include <stdlib.h>
#include <stdio.h>
#include <comm/comm_nccl.h>
 
void device_nccl_sendrecv(void *sbuf_d, int soffset, int scount, int srank,
                          void *rbuf_d, int roffset, int rcount, int rrank,
                          int nbytes, void *stream) {
 
#if defined(HAVE_NCCL) || defined(HAVE_RCCL)
  if (nbytes == sizeof(float)) {
    ncclGroupStart();
    ncclSend(sbuf_d+soffset, scount, ncclFloat, srank, NEKO_COMM_NCCL, stream);
    ncclRecv(rbuf_d+roffset, rcount, ncclFloat, rrank, NEKO_COMM_NCCL, stream);
    ncclGroupEnd();
  }
  else if (nbytes == sizeof(double)) {
    ncclGroupStart();
    ncclSend(sbuf_d+soffset, scount, ncclFloat64, srank, NEKO_COMM_NCCL, stream);
    ncclRecv(rbuf_d+roffset, rcount, ncclFloat64, rrank, NEKO_COMM_NCCL, stream);
    ncclGroupEnd();
  }
  else {
    fprintf(stderr, __FILE__ ": Invalid data type)\n");
    exit(1);
  }
#endif
}