rocm-systems/tools/topo_expl/model.cpp

/*
Copyright (c) 2019-2020 Advanced Micro Devices, Inc. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#include "nccl.h"
#include "channel.h"
#include "nvmlwrap.h"
#include "bootstrap.h"
#include "transport.h"
#include "group.h"
#include "net.h"
#include "graph.h"
#include "argcheck.h"
#include <sched.h>
#include <fcntl.h>
#include <unistd.h>
#include <hip/hip_runtime.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "model.h"
#include "topo.h"

extern NodeModel *node_model;

ncclNet_t ncclNetDummy = {
  "IB",
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0
};

ncclNet_t* ncclNet = &ncclNetDummy;

/* Convert a PCI busId string into a local cudaDev device index (cf. CUDA_VISIBLE_DEVICES) */
int busIdToCudaDev(int64_t busId) {
  return node_model->busIdToCudaDev(busId);
}

/* Determine if two peers can communicate with P2P */
ncclResult_t p2pCanConnect(int* ret, struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* info1, struct ncclPeerInfo* info2) {
  // Rule out different nodes
  *ret = 0;
  if (info1->hostHash != info2->hostHash) return ncclSuccess;
  int cudaDev1 = busIdToCudaDev(info1->busId);
  int cudaDev2 = busIdToCudaDev(info2->busId);
  *ret = node_model->p2pCanConnect(cudaDev1, cudaDev2);
  return ncclSuccess;
}

/* Send: Create and return connect structures for this peer to connect to me */
ncclResult_t p2pSendSetup(struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo,
    struct ncclConnect* connectInfo, struct ncclConnector* send, int channelId) {
  if (myInfo->pidHash == peerInfo->pidHash) {
    if (myInfo->cudaDev == peerInfo->cudaDev) {
      INFO(NCCL_INIT|NCCL_P2P,"Ring %02d : %d[%d] -> %d[%d] via P2P/common device", channelId, myInfo->rank, myInfo->cudaDev, peerInfo->rank, peerInfo->cudaDev);
      return ncclInternalError;
    } else {
      INFO(NCCL_INIT|NCCL_P2P,"Ring %02d : %d[%lx] -> %d[%lx] via P2P/direct pointer",
          channelId, myInfo->rank, myInfo->busId, peerInfo->rank, peerInfo->busId);
    }
  } else {
    INFO(NCCL_INIT|NCCL_P2P,"Ring %02d : %d[%lx] -> %d[%lx] via P2P/IPC",
        channelId, myInfo->rank, myInfo->busId, peerInfo->rank, peerInfo->busId);
    //TRACE_DUMP_IPC(&info.devIpc);
  }
  return ncclSuccess;
}

/* Create and return connect structures for this peer to connect to me */
ncclResult_t p2pRecvSetup(struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo,
    struct ncclConnect* connectInfo, struct ncclConnector * recv, int channelId) {
  return ncclSuccess;
}

struct ncclTransport p2pTransport = {
  "P2P",
  p2pCanConnect,
  { p2pSendSetup, NULL, NULL, NULL },
  { p2pRecvSetup, NULL, NULL, NULL }
};

/* Determine if two peers can communicate with SHM */
ncclResult_t shmCanConnect(int* ret, struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* info1, struct ncclPeerInfo* info2) {
  // Rule out different nodes
  *ret = 0;
  if (info1->hostHash != info2->hostHash) return ncclSuccess;
  int cudaDev1 = busIdToCudaDev(info1->busId);
  int cudaDev2 = busIdToCudaDev(info2->busId);
  *ret = node_model->shmCanConnect(cudaDev1, cudaDev2);
  return ncclSuccess;
}

/* Create and return connect structures for this peer to connect to me */
ncclResult_t shmSendSetup(struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo, struct ncclConnect* connectInfo, struct ncclConnector* send, int channelId) {
  INFO(NCCL_INIT|NCCL_SHM,"Ring %02d : %d[%lx] -> %d[%lx] via direct shared memory", channelId, myInfo->rank, myInfo->busId, peerInfo->rank, peerInfo->busId);
  return ncclSuccess;
}

ncclResult_t shmRecvSetup(struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo, struct ncclConnect* connectInfo, struct ncclConnector* recv, int channelId) {
  return ncclSuccess;
}

struct ncclTransport shmTransport = {
  "SHM",
  shmCanConnect,
  { shmSendSetup, NULL, NULL, NULL },
  { shmRecvSetup, NULL, NULL, NULL }
};

/* Determine if two peers can communicate with NET */
ncclResult_t netCanConnect(int* ret, struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* info1, struct ncclPeerInfo* info2) {
  *ret = node_model->netCanConnect(info1->rank, info2->rank);
  return ncclSuccess;
}

ncclResult_t netSendSetup(struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo, struct ncclConnect* connectInfo, struct ncclConnector* send, int channelId) {
  int netDev, useGdr = 0;

  NCCLCHECK(ncclTopoGetNetDev(topo, myInfo->rank, graph, channelId, &netDev));
  NCCLCHECK(ncclTopoCheckGdr(topo, myInfo->busId, netDev, 1, &useGdr));

  INFO(NCCL_INIT|NCCL_NET,"Ring %02d : %d[%lx] -> %d[%lx] [send] via NET/%s/%d%s", channelId, myInfo->rank, myInfo->busId, peerInfo->rank, peerInfo->busId, ncclNetName(), netDev,
      useGdr ? "/GDRDMA" : "");
  return ncclSuccess;
}

NCCL_PARAM(NetGdrLevel, "NET_GDR_LEVEL", PATH_PHB);

ncclResult_t netRecvSetup(struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo, struct ncclConnect* connectInfo, struct ncclConnector* recv, int channelId) {
  int netDev, useGdr = 0;

  NCCLCHECK(ncclTopoGetNetDev(topo, myInfo->rank, graph, channelId, &netDev));
  NCCLCHECK(ncclTopoCheckGdr(topo, myInfo->busId, netDev, 0, &useGdr));

  INFO(NCCL_INIT|NCCL_NET,"Ring %02d : %d[%lx] -> %d[%lx] [receive] via NET/%s/%d%s", channelId, peerInfo->rank, peerInfo->busId, myInfo->rank, myInfo->busId, ncclNetName(), netDev,
      useGdr ? "/GDRDMA" : "");
  return ncclSuccess;
}

struct ncclTransport netTransport = {
  "NET",
  netCanConnect,
  { netSendSetup, NULL, NULL, NULL },
  { netRecvSetup, NULL, NULL, NULL }
};

struct ncclTransport ncclTransports[NTRANSPORTS] = {
  p2pTransport,
  shmTransport,
  netTransport,
};