首页
产品
解决方案
开发者
合作伙伴
高校
昇腾AI市场
产业资讯
支持与服务
文档HOT
下载
中文
注册
文档首页
我要评分
文档获取效率
文档正确性
内容完整性
文档易理解
提交
在线提单
论坛求助
昇腾小AI

HcclCreateSubCommConfig方式创建子通信域

HcclCreateSubCommConfig接口可以基于全局通信域创建子通信域，全局通信域可以基于ranktable文件或者root info协商方式创建，该样例以基于ranktable文件创建的全局通信域为例，给出如何创建子通信域的样例代码。

准备ranktable文件

该样例中全局通信域通过获取ranktable的方式进行初始化，所以需准备一份ranktable文件配置集群信息，供后续调用接口时使用。

配置“RANK_TABLE_FILE”环境变量，指定ranktable文件所在路径，如下所示，文件名称为“ranktable.json”。

export RANK_TABLE_FILE=/home/test/ranktable.json
以Atlas A2 训练系列产品，组网为单机8卡为例，ranktable.json配置示例如下，不同产品形态ranktable文件的配置示例及详细参数说明可参见ranktable文件配置资源信息。 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
{
        "status":"completed",   // ranktable可用标识，completed为可用
        "version": "1.0",
        "server_count": "1",   // 参与训练的AI Server数目
        "server_list": [{
                "server_id": "SERVER_ID_SV1",   // AI Server标识，String类型，请确保全局唯一
                "device": [{          // AI Server中的Device列表
                        "device_id": "0",
                        "device_ip": "192.168.1.8",
                        "rank_id": "0"
                },
                {
                        "device_id": "1",
                        "device_ip": "192.168.1.9",
                        "rank_id": "1"
                },
                {
                        "device_id": "2",
                        "device_ip": "192.168.1.10",
                        "rank_id": "2"
                },
                {
                        "device_id": "3",
                        "device_ip": "192.168.1.10",
                        "rank_id": "3"
                },
                {
                        "device_id": "4",
                        "device_ip": "192.168.1.10",
                        "rank_id": "4"
                },
                {
                        "device_id": "5",
                        "device_ip": "192.168.1.10",
                        "rank_id": "5"
                },
                {
                        "device_id": "6",
                        "device_ip": "192.168.1.10",
                        "rank_id": "6"
                },
                {
                        "device_id": "7",
                        "device_ip": "192.168.1.11",
                        "rank_id": "7"
                }]
        }]
}

HcclSend/HcclRecv操作代码样例

该样例仅支持从单机N卡的组网中切分出1个4卡子通信域，N需要大于等于4且小于等于8。实际执行节点仅限于属于子通信域的4张卡，属于组网但不属于子通信域的节点不可执行该用例。

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
 
#include <iostream>
#include <vector>
#include <memory>
#include <thread>
#include <chrono>
#include <cstring>
#include "hccl/hccl.h"
#include "hccl/hccl_types.h"
#include "mpi.h"

#define ACLCHECK(ret) do { \
    if(ret != ACL_SUCCESS)\
    {\
        printf("acl interface return err %s:%d, retcode: %d \n", __FILE__, __LINE__, ret);\
        return ret;\
    }\
} while(0)

#define HCCLCHECK(ret) do {  \
    if(ret != HCCL_SUCCESS) \
    {   \
        printf("hccl interface return errreturn err %s:%d, retcode: %d \n", __FILE__, __LINE__, ret); \
        return ret;\
    } \
} while(0)

struct ThreadContext {
    HcclComm comm;
    int32_t device;
};
int Sample(void *arg)
{
    ThreadContext* ctx = (ThreadContext *)arg;
    // 申请通信用device、sendBuf，recvBuf内存、stream等资源
    ACLCHECK(aclrtSetDevice(ctx->device));
    aclrtStream stream;
    ACLCHECK(aclrtCreateStream(&stream));
    void* sendBuff;
    void* recvBuff;
    void* hostBuff;
    uint64_t count = 4;
    int mallocSize = count * sizeof(float);
     //初始化输入内存
    ACLCHECK(aclrtMallocHost((void**)&hostBuff, mallocSize));
    float* tmpHostBuff = static_cast<float*>(hostBuff);
    for (uint32_t i = 0; i < count; ++i) {
        tmpHostBuff[i] = 2;
    }
    ACLCHECK(aclrtMalloc((void**)&sendBuff, mallocSize, ACL_MEM_MALLOC_HUGE_FIRST));
    ACLCHECK(aclrtMemcpy((void*)sendBuff, mallocSize, (void*)hostBuff, mallocSize, ACL_MEMCPY_HOST_TO_DEVICE));
    ACLCHECK(aclrtMalloc((void**)&recvBuff, mallocSize, ACL_MEM_MALLOC_HUGE_FIRST));
    // 执行SendRecv操作
    if (ctx->device / 2 == 0) {
        HCCLCHECK(HcclSend(sendBuff, count, HCCL_DATA_TYPE_FP32, ctx->device + 2, ctx->comm, stream));
    } else {
        HCCLCHECK(HcclRecv(recvBuff, count, HCCL_DATA_TYPE_FP32, ctx->device - 2, ctx->comm, stream));
    }
    ACLCHECK(aclrtSynchronizeStream(stream));

    if (ctx->device / 2 == 1) {
        void* resultBuff;
        ACLCHECK(aclrtMallocHost((void**)&resultBuff, mallocSize));
        ACLCHECK(aclrtMemcpy((void*)resultBuff, mallocSize, (void*)recvBuff, mallocSize, ACL_MEMCPY_DEVICE_TO_HOST));
        float* tmpResBuff = static_cast<float*>(resultBuff);
        for (uint32_t i = 0; i < count; ++i) {
            std::cout <<  "rankId:" << ctx->device << ",i" << i << " " << tmpResBuff[i] << std::endl;
        }
        ACLCHECK(aclrtFreeHost(resultBuff));
    }
    // 释放通信用sendBuf、recvBuf内存，stream等资源
    ACLCHECK(aclrtFreeHost(hostBuff));
    ACLCHECK(aclrtFree(recvBuff));
    ACLCHECK(aclrtFree(sendBuff));
    ACLCHECK(aclrtDestroyStream(stream));
    ACLCHECK(aclrtResetDevice(ctx->device));
    return 0;
}
int main()
{
    MPI_Init(NULL, NULL);
    int procSize = 0;
    int procRank = 0;
    // 获取当前进程在所属进程组的编号
    MPI_Comm_size(MPI_COMM_WORLD, &procSize);
    MPI_Comm_rank(MPI_COMM_WORLD, &procRank);
    int devId = procRank;
    int devCount = procSize;
    // 设备资源初始化
    ACLCHECK(aclInit(NULL));
    // 获取ranktable路径
    char* rankTableFile = getenv("RANK_TABLE_FILE");
    // 指定集合通信操作使用的设备
    ACLCHECK(aclrtSetDevice(devId));

    // 创建并初始化通信域配置项
    HcclCommConfig config;
    HcclCommConfigInit(&config);
    // 根据需要修改通信域配置
    config.hcclBufferSize = 50;
    strcpy(config.hcclCommName, "comm_1");

    HcclComm globalHcclComm;
    HcclCommInitClusterInfoConfig(rankTableFile, devId, &config, &globalHcclComm);
    HcclComm hcclComm;
    strcpy(config.hcclCommName, "comm_2");
    uint32_t rankIds[4] = {0, 1, 2, 3};
    HCCLCHECK(HcclCreateSubCommConfig(&globalHcclComm, 4, rankIds, 1, devId, &config, &hcclComm));
    struct ThreadContext args;
    args.comm = hcclComm;
    args.device = devId;
    Sample((void *)&args);
    HCCLCHECK(HcclCommDestroy(hcclComm));
    // 设备资源去初始化
    ACLCHECK(aclFinalize());
    MPI_Finalize();
    return 0;
}

HcclAllReduce操作代码样例

该样例仅支持从单机8卡的组网中切分出2个4卡子通信域。

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
 
#include <iostream>
#include <vector>
#include <memory>
#include <thread>
#include <chrono>
#include <cstring>
#include "hccl/hccl.h"
#include "hccl/hccl_types.h"
#include "mpi.h"

#define ACLCHECK(ret) do { \
    if(ret != ACL_SUCCESS)\
    {\
        printf("acl interface return err %s:%d, retcode: %d \n", __FILE__, __LINE__, ret);\
        return ret;\
    }\
} while(0)

#define HCCLCHECK(ret) do {  \
    if(ret != HCCL_SUCCESS) \
    {   \
        printf("hccl interface return errreturn err %s:%d, retcode: %d \n", __FILE__, __LINE__, ret); \
        return ret;\
    } \
} while(0)

struct ThreadContext {
    HcclComm commFront;
    HcclComm commBack;
    int32_t device;
};
int Sample(void *arg)
{
    ThreadContext* ctx = (ThreadContext *)arg;
    void* host_buf = nullptr;
    void* send_buff = nullptr;
    void* recv_buff = nullptr;
    uint64_t count = 1;
    int malloc_kSize = count * sizeof(float);
    aclrtEvent start_event, end_event;
    aclrtStream stream;
    ACLCHECK(aclrtCreateStream(&stream));
    ACLCHECK(aclrtCreateEvent(&start_event));
    ACLCHECK(aclrtCreateEvent(&end_event));
	
    //申请集合通信操作的内存
    ACLCHECK(aclrtMalloc((void**)&send_buff, malloc_kSize, ACL_MEM_MALLOC_HUGE_FIRST));
    ACLCHECK(aclrtMalloc((void**)&recv_buff, malloc_kSize, ACL_MEM_MALLOC_HUGE_FIRST));
	
    //初始化输入内存
    ACLCHECK(aclrtMallocHost((void**)&host_buf, malloc_kSize));
    ACLCHECK(aclrtMemcpy((void*)send_buff, malloc_kSize, (void*)host_buf, malloc_kSize, ACL_MEMCPY_HOST_TO_DEVICE));
	
    //执行集合通信操作
    if (ctx->device < 4) {
        HCCLCHECK(HcclAllReduce((void *)send_buff, (void*)recv_buff, count, HCCL_DATA_TYPE_FP32, HCCL_REDUCE_SUM, ctx->commFront, stream));
    } else {
        HCCLCHECK(HcclAllReduce((void *)send_buff, (void*)recv_buff, count, HCCL_DATA_TYPE_FP32, HCCL_REDUCE_SUM, ctx->commBack, stream));
    }
    //等待stream中集合通信任务执行完成
    ACLCHECK(aclrtSynchronizeStream(stream));

    if (ctx->device < 8) {
        void* resultBuff;
        ACLCHECK(aclrtMallocHost((void**)&resultBuff, malloc_kSize));
        ACLCHECK(aclrtMemcpy((void*)resultBuff, malloc_kSize, (void*)recv_buff, malloc_kSize, ACL_MEMCPY_DEVICE_TO_HOST));
        float* tmpResBuff = static_cast<float*>(resultBuff);
        for (uint32_t i = 0; i < count; ++i) {
            std::cout <<  "rankId:" << ctx->device << ",i" << i << " " << tmpResBuff[i] << std::endl;
        }
        ACLCHECK(aclrtFreeHost(resultBuff));
    }

    ACLCHECK(aclrtFree(send_buff));
    ACLCHECK(aclrtFree(recv_buff));
    ACLCHECK(aclrtFreeHost(host_buf));
    //销毁任务流
    ACLCHECK(aclrtDestroyStream(stream));
    ACLCHECK(aclrtDestroyEvent(start_event));
    ACLCHECK(aclrtDestroyEvent(end_event));
    return 0;
}

int main()
{
    MPI_Init(NULL, NULL);
    int procSize = 0;
    int procRank = 0;
    // 获取当前进程在所属进程组的编号
    MPI_Comm_size(MPI_COMM_WORLD, &procSize);
    MPI_Comm_rank(MPI_COMM_WORLD, &procRank);
    int devId = procRank;
    int devCount = procSize;
    // 设备资源初始化
    ACLCHECK(aclInit(NULL));
    // 获取ranktable路径
    char* rankTableFile = getenv("RANK_TABLE_FILE");
    // 指定集合通信操作使用的设备
    ACLCHECK(aclrtSetDevice(devId));

    // 创建并初始化通信域配置项
    HcclCommConfig config;
    HcclCommConfigInit(&config);
    // 根据需要修改通信域配置
    config.hcclBufferSize = 50;
    strcpy(config.hcclCommName, "comm_1");

    HcclComm globalHcclComm;
    HcclCommInitClusterInfoConfig(rankTableFile, devId, &config, &globalHcclComm);
    struct ThreadContext args;
    if (devId < 4) {
        HcclComm hcclCommFront;
        strcpy(config.hcclCommName, "comm_2");
        uint32_t rankIdsFront[4] = {0, 1, 2, 3};
        HCCLCHECK(HcclCreateSubCommConfig(&globalHcclComm, 4, rankIdsFront, 1, devId, &config, &hcclCommFront));
        args.commFront = hcclCommFront;
        args.device = devId;
        Sample((void *)&args);
        HCCLCHECK(HcclCommDestroy(hcclCommFront));
    } else {
        HcclComm hcclCommBack;
        strcpy(config.hcclCommName, "comm_3");
        uint32_t rankIdsBack[4] = {4, 5, 6, 7};
        HCCLCHECK(HcclCreateSubCommConfig(&globalHcclComm, 4, rankIdsBack, 2, devId - 4, &config, &hcclCommBack));
        args.commBack = hcclCommBack;
        args.device = devId;
        Sample((void *)&args);
        HCCLCHECK(HcclCommDestroy(hcclCommBack));
    }
    // 设备资源去初始化
    ACLCHECK(aclFinalize());
    MPI_Finalize();
    return 0;
}
父主题： 样例代码
搜索结果
找到“0”个结果

当前产品无相关内容

未找到相关内容，请尝试其他搜索词