LCOV - code coverage report
Current view: top level - legacy/ascend910/algorithm/base/alg_template/temp_gather - gather_star.cc (source / functions) Coverage Total Hit
Test: coverage.info Lines: 0.0 % 87 0
Test Date: 2026-08-18 17:47:01 Functions: 0.0 % 9 0

            Line data    Source code
       1              : /**
       2              :  * Copyright (c) 2025 Huawei Technologies Co., Ltd.
       3              :  * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
       4              :  * CANN Open Software License Agreement Version 2.0 (the "License").
       5              :  * Please refer to the License for details. You may not use this file except in compliance with the License.
       6              :  * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
       7              :  * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
       8              :  * See LICENSE in the root of the software repository for the full text of the License.
       9              :  */
      10              : 
      11              : #include "gather_star.h"
      12              : #include "alg_template_register.h"
      13              : 
      14              : namespace hccl {
      15              : // Gather的入口函数
      16            0 : GatherStar::GatherStar(const HcclDispatcher dispatcher) : AlgTemplateBase(dispatcher) {}
      17              : 
      18            0 : GatherStar::~GatherStar() {}
      19              : 
      20            0 : HcclResult GatherStar::Prepare(u32 userRank)
      21              : {
      22            0 :     userRank_ = userRank;
      23            0 :     return HCCL_SUCCESS;
      24              : }
      25              : 
      26              : HcclResult
      27            0 : GatherStar::RunAsync(const u32 rank, const u32 rankSize, const std::vector<std::shared_ptr<Transport>>& links)
      28              : {
      29            0 :     HCCL_INFO("GatherStar rank[%u] root[%u] linksize[%u]", rank, root_, links.size());
      30              :     // task下发接口
      31            0 :     CHK_SMART_PTR_NULL(dispatcher_);
      32              :     // ==1的处理
      33            0 :     if (rankSize == 1) {
      34            0 :         if (inputMem_ != outputMem_) {
      35            0 :             HcclResult ret = HcclD2DMemcpyAsync(dispatcher_, outputMem_, inputMem_, stream_);
      36            0 :             CHK_PRT_RET(
      37              :                 ret != HCCL_SUCCESS,
      38              :                 HCCL_ERROR(
      39              :                     "[GatherStar][RunAsync]rank[%u] copy input[%p] to output[%p] "
      40              :                     "failed",
      41              :                     rank, inputMem_.ptr(), outputMem_.ptr()),
      42              :                 ret);
      43              :         }
      44            0 :         return HCCL_SUCCESS;
      45              :     }
      46              :     // links本rank_id与通信域内其它rank的通信连接,rankSize本executor所在通信域的rank个数
      47            0 :     if (links.size() < rankSize) {
      48            0 :         HCCL_ERROR(
      49              :             "[GatherStar][RunAsync]rank[%u] linksize[%llu] is less than rankSize[%u]", rank, links.size(), rankSize);
      50            0 :         return HCCL_E_INTERNAL;
      51              :     }
      52              :     // 计算offset
      53            0 :     u32 unitSize = DataUnitSize(dataType_);
      54            0 :     if (unitSize == 0) {
      55            0 :         HCCL_ERROR("[GatherStar][RunAsync]rank[%u] unit data size is zero", rank);
      56            0 :         return HCCL_E_INTERNAL;
      57              :     }
      58            0 :     if (slices_.size() == 0) {
      59            0 :         PrepareSlicesData(unitSize, count_, rankSize);
      60              :     }
      61              : 
      62            0 :     Slice sendSlice;
      63            0 :     sendSlice.offset = dataBytes_ * rank;
      64            0 :     sendSlice.size = dataBytes_;
      65            0 :     Slice recvSlice;
      66            0 :     recvSlice.offset = 0;
      67            0 :     recvSlice.size = dataBytes_;
      68            0 :     if (rank == root_) {
      69              :         // root 从对端其他rank收
      70            0 :         for (u32 srcRank = 0; srcRank < rankSize; srcRank++) {
      71            0 :             HcclResult ret = RunRecvGather(srcRank, recvSlice, links);
      72            0 :             CHK_PRT_RET(
      73              :                 ret != HCCL_SUCCESS,
      74              :                 HCCL_ERROR(
      75              :                     "[GatherStar][RunAsync] srcrank[%u] recv broadcast from"
      76              :                     "root rank[%u] run failed!",
      77              :                     srcRank, root_),
      78              :                 ret);
      79              :         }
      80              :     } else {
      81              :         // 非root 给root发
      82            0 :         CHK_RET(RunSendGather(root_, sendSlice, links));
      83              :     }
      84              : 
      85            0 :     return HCCL_SUCCESS;
      86              : }
      87              : 
      88            0 : void GatherStar::PrepareSlicesData(const u32 unitSize, const u64 totalCount, const u32 rankSize) const
      89              : {
      90            0 :     slices_.resize(rankSize);
      91            0 :     u64 sliceSize = totalCount * unitSize;
      92              : 
      93            0 :     for (u32 i = 0; i < rankSize; i++) {
      94            0 :         slices_[i].offset = i * sliceSize;
      95            0 :         slices_[i].size = sliceSize;
      96            0 :         HCCL_DEBUG("default slice[%u]: offset: [%llu] size[%llu]", i, i * sliceSize, sliceSize);
      97              :     }
      98            0 : }
      99              : 
     100            0 : HcclResult GatherStar::RunRecvGather(const u32 srcRank, const Slice& slice, const std::vector<LINK>& links)
     101              : {
     102              :     // root 接受数据
     103            0 :     DeviceMem dst;
     104            0 :     if (slice.size > 0 && srcRank != root_) {
     105            0 :         if (srcRank >= links.size()) {
     106            0 :             HCCL_ERROR(
     107              :                 "[Run][GatherStar][RecvGather]SrcRank[%u] is out of range, linkSize[%llu]", srcRank, links.size());
     108            0 :             return HCCL_E_INTERNAL;
     109              :         }
     110              : 
     111            0 :         dst = outputMem_.range(slice.size * srcRank, slice.size);
     112            0 :         HCCL_DEBUG(
     113              :             "rank[%u] will rcv with output's offset[%llu], size[%llu] dstmem[%p]", root_, slice.offset, slice.size,
     114              :             dst.ptr());
     115              : 
     116            0 :         if (links[srcRank]->IsTransportRoce()) {
     117            0 :             CHK_RET(links[srcRank]->TxEnv(dst.ptr(), slice.size, stream_));
     118              :         } else {
     119            0 :             CHK_RET(links[srcRank]->TxAck(stream_));
     120              :         }
     121              : 
     122            0 :         HcclResult ret = links[srcRank]->RxAsync(UserMemType::OUTPUT_MEM, slice.offset, dst.ptr(), slice.size, stream_);
     123            0 :         CHK_PRT_RET(
     124              :             ret != HCCL_SUCCESS,
     125              :             HCCL_ERROR(
     126              :                 "[Run][GatherStar][RecvGather]rank[%u] rx async with output's offset[%llu] failed", root_,
     127              :                 slice.offset),
     128              :             ret);
     129              : 
     130            0 :         if (!links[srcRank]->IsTransportRoce()) {
     131            0 :             ret = ExecuteBarrier(links[srcRank], stream_);
     132            0 :             CHK_PRT_RET(
     133              :                 ret != HCCL_SUCCESS,
     134              :                 HCCL_ERROR("[Run][GatherStar][SendGather]srcRank[%u] gather mesh run executor barrier failed", srcRank),
     135              :                 ret);
     136              : 
     137            0 :             ret = links[srcRank]->RxWaitDone(stream_);
     138            0 :             CHK_PRT_RET(
     139              :                 ret != HCCL_SUCCESS, HCCL_ERROR("[Run][GatherStar][GatherStar][SendGather]RxWaitDone failed"), ret);
     140              :         }
     141            0 :     } else if (srcRank == root_) {
     142            0 :         CHK_RET(HcclMemcpyAsync(
     143              :             dispatcher_, static_cast<u8*>(outputMem_.ptr()) + slice.offset, outputMem_.size() - slice.offset,
     144              :             inputMem_.ptr(), slice.size, HcclRtMemcpyKind::HCCL_RT_MEMCPY_KIND_DEVICE_TO_DEVICE, stream_,
     145              :             INVALID_VALUE_RANKID, LinkType::LINK_ONCHIP));
     146              :     }
     147              : 
     148            0 :     return HCCL_SUCCESS;
     149            0 : }
     150              : 
     151            0 : HcclResult GatherStar::RunSendGather(const u32 dstRank, const Slice& slice, const std::vector<LINK>& links)
     152              : {
     153              :     // 非root发送数据
     154            0 :     if (slice.size > 0) {
     155            0 :         HCCL_DEBUG(
     156              :             "root rank[%u] tx input[%p] offset[%llu] to srcrank size[%llu] ", dstRank, inputMem_.ptr(), slice.offset,
     157              :             slice.size);
     158            0 :         if (dstRank >= links.size()) {
     159            0 :             HCCL_ERROR(
     160              :                 "[Run][GatherStar][SendGather]DstRank[%u] is out of range, link Size[%llu]", dstRank, links.size());
     161            0 :             return HCCL_E_INTERNAL;
     162              :         }
     163              : 
     164            0 :         if (links[dstRank]->IsTransportRoce()) {
     165            0 :             CHK_RET(links[dstRank]->RxEnv(stream_));
     166              :         } else {
     167            0 :             CHK_RET(links[dstRank]->RxAck(stream_));
     168              :         }
     169              : 
     170              :         HcclResult ret
     171            0 :             = links[dstRank]->TxAsync(UserMemType::OUTPUT_MEM, slice.offset, inputMem_.ptr(), slice.size, stream_);
     172            0 :         CHK_PRT_RET(
     173              :             ret != HCCL_SUCCESS,
     174              :             HCCL_ERROR(
     175              :                 "[Run][GatherStar][SendGather]srcrank[%u] tx async to root"
     176              :                 "rank[%u] run failed",
     177              :                 dstRank, root_),
     178              :             ret);
     179              : 
     180            0 :         if (!links[dstRank]->IsTransportRoce()) {
     181            0 :             ret = ExecuteBarrierSrcRank(links[dstRank], stream_);
     182            0 :             CHK_PRT_RET(
     183              :                 ret != HCCL_SUCCESS,
     184              :                 HCCL_ERROR(
     185              :                     "[Run][GatherStar][SendGather]dstRank[%u] gather mesh run"
     186              :                     "executor barrier failed",
     187              :                     dstRank),
     188              :                 ret);
     189            0 :             ret = links[dstRank]->TxWaitDone(stream_);
     190            0 :             CHK_PRT_RET(ret != HCCL_SUCCESS, HCCL_ERROR("[Run][GatherStar][SendGather]TxWaitDone failed"), ret);
     191              :         }
     192              :     }
     193            0 :     return HCCL_SUCCESS;
     194              : }
     195              : 
     196            0 : HcclResult GatherStar::ExecuteBarrierSrcRank(std::shared_ptr<Transport> link, Stream& stream) const
     197              : {
     198            0 :     CHK_RET(link->RxAck(stream));
     199              : 
     200            0 :     CHK_RET(link->TxAck(stream));
     201              : 
     202            0 :     CHK_RET(link->RxDataSignal(stream));
     203              : 
     204            0 :     CHK_RET(link->TxDataSignal(stream));
     205              : 
     206            0 :     return HCCL_SUCCESS;
     207              : }
     208              : REGISTER_TEMPLATE(TemplateType::TEMPLATE_GATHER_STAR, GatherStar);
     209              : } // namespace hccl
        

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