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样例参考

本节给出实现RPing功能的完整代码样例。

该样例实现了一个单机8卡组网场景的RPing功能。

代码样例

样例代码文件包含“rping_test.cc”与“rping_test.h”文件。

  • 头文件“rping_test.h”定义了device的IP地址，以单机八卡为例，具体如下：
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    #include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "acl/acl.h"
#include "acl/acl_prof.h"
#include "hccl/hccn_rping.h"

// 以单机8卡为例，以下配置中IP地址仅为示例
#define ipLen 16

char deviceIp[8][ipLen] =
{
    "192.168.99.127",
    "192.168.99.128",
    "192.168.99.129",
    "192.168.99.130",
    "192.168.99.131",
    "192.168.99.132",
    "192.168.99.133",
    "192.168.99.134"
};
  • “rping_test.cc”文件具体实现了RPing功能，代码示例如下：
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    #include <chrono>
#include <vector>
#include <thread>
#include <atomic>
#include "rping_test.h"

int singleDevAllProc(int devId, std::vector<int> devices, int devClientId, std::atomic<bool> *isStop)
{
    // 初始化device
    HccnRpingInitAttr *initAttr = new HccnRpingInitAttr();
    initAttr->mode = HCCN_RPING_MODE_ROCE;
    initAttr->port = 13886;
    initAttr->npuNum = 128;
    initAttr->bufferSize = 4096 * 50; // 必须大于这个值：pktnum * 2048 * targetNum
    initAttr->ipAddr = new char[ipLen];
    strcpy(initAttr->ipAddr, deviceIp[devId]);
    HccnRpingCtx rpingCtx = nullptr;
    aclrtSetDevice(devId);
    HccnResult ret = HccnRpingInit(devId, initAttr, &rpingCtx);
    if (ret != HCCN_SUCCESS) {
        printf("device init failed.\n");
        return -1;
    }
    printf("rpingCtx [%p]", rpingCtx);
    printf("device[%d] init success!\n", devId);
    if (devId != devClientId) {
        sleep(20); // target启动后需要一直保持等待探测请求的状态
        while (isStop->load() == false) {
            sleep(1);
            continue;
        }
        HccnRpingDeinit(rpingCtx);
        delete[] initAttr->ipAddr;
        delete initAttr;
        return 0;
    }
    // 添加target
    int targetNum = devices.size() - 1;
    HccnRpingTargetInfo *target = new HccnRpingTargetInfo[targetNum];
    for (int i = 0; i < devices.size() - 1; i++) {
        int devTargetId = devices[i];
        target[i].srcPort = 0;

        target[i].sl = 4;
        target[i].tc = (33 & 0x3f) << 2;
        target[i].port = 13886;
        target[i].payloadLen = 12;
        target[i].srcIp = new char[ipLen];
        target[i].dstIp = new char[ipLen];
        char payload[12] = "hellotarget";
        strcpy(target[i].payload, payload);
        strcpy(target[i].srcIp, deviceIp[devClientId]);
        strcpy(target[i].dstIp, deviceIp[devTargetId]);
    }

    ret = HccnRpingAddTarget(rpingCtx, targetNum, target);
    if (ret != HCCN_SUCCESS) {
        delete[] target;
        printf("device add target failed.\n");
        return -1;
    }
    printf("device[%d] add target success!\n", devId);
    // 发起请求
    uint32_t pktNum = 10;   // 发给每个target的报文数量
    uint32_t interval = 1;  // ms
    uint32_t timeout = 100; // ms
    ret = HccnRpingBatchPingStart(rpingCtx, pktNum, interval, timeout);
    if (ret != HCCN_SUCCESS) {
        delete[] target;
        printf("device start ping failed.\n");
        return -1;
    }
    printf("device[%d] start ping!\n", devId);
    // 获取结果
    HccnRpingResultInfo *result = new HccnRpingResultInfo[targetNum];
    HccnResult hccnRet = HCCN_E_AGAIN;
    while(hccnRet == HCCN_E_AGAIN) {
        sleep(1);
        hccnRet =  HccnRpingGetResult(rpingCtx, targetNum, target, result);
    }
    if (ret != HCCN_SUCCESS) {
        delete[] target;
        delete[] result;
        printf("device get result failed.\n");
        return -1;
    }
    for (int i = 0; i < targetNum; i++) {
        printf("txPkt[%u] rxPkt[%u] minRTT[%u] maxRTT[%u] avgRTT[%u] state[%u]\n",
            result[i].txPkt,
            result[i].rxPkt,
            result[i].minRTT,
            result[i].maxRTT,
            result[i].avgRTT,
            result[i].state);
    }

    unsigned int payloadLenOutput = 0;
    void* payloadOutput;
    HccnRpingGetPayload(rpingCtx, &payloadOutput, &payloadLenOutput);
    int payloadNum = payloadLenOutput / 2048;
    for (int i = 0; i < payloadNum; i++) {
        HccnRpingPayloadHead *head = static_cast<HccnRpingPayloadHead*>(payloadOutput);
        printf("[%dth] srcIp:%s, dstIp:%s, payloadLen:%d, t1:%llu %llu, t2:%llu %llu, t3:%llu %llu, t4:%llu %llu, task id:%u\n",
			i,
                        head->srcIp, head->dstIp,
                        head->payloadLen,
			head->t1.sec, head->t1.usec,
			head->t2.sec, head->t2.usec,
			head->t3.sec, head->t3.usec,
			head->t4.sec, head->t4.usec,
			head->rpingBatchId);
        char* ptrTmp = static_cast<char*>(payloadOutput);
	ptrTmp += 2048;
	payloadOutput = ptrTmp;
    }
    
    ret = HccnRpingBatchPingStop(rpingCtx);
    if (ret != HCCN_SUCCESS) {
        delete[] target;
        delete[] result;
        printf("device stop ping failed.\n");
        return -1;
    }
    printf("device[%d] stop ping!\n", devId);

    HccnRpingRemoveTarget(rpingCtx, targetNum, target);
    if (ret != HCCN_SUCCESS) {
        delete[] target;
        delete[] result;
        printf("device remove target failed.\n");
        return -1;
    }
    printf("device[%d] remove target success!\n", devId);

    // 释放内存
    ret = HccnRpingDeinit(rpingCtx);
    if (ret != HCCN_SUCCESS) {
        printf("device deinit failed.\n");
        return -1;
    }
    printf("device[%d] deinit success!\n", devId);
    for (int i = 0; i < targetNum; i++) {
        delete[] target[i].srcIp;
        delete[] target[i].dstIp;
    }
    delete[] result;
    delete[] target;
    printf("rpingCtx test success!!!\n");
    return 0;
}
int main(int argc, char *argv[])
{
    // 获取设备个数
    int deviceNum = argc - 2;
    // 获取循环次数
    int loop = atoi(argv[1]);
    // 记录client Id
    int devClientId = atoi(argv[2]);
    // 记录全部的device Id
    std::vector<int> devices;
    for (int i = 0; i < deviceNum; i++) {
        int dev = atoi(argv[i + 2]);
        bool isRepeat = false;
        for (int j = 0; j < devices.size(); j++) {
            if (dev == devices[j]) {
                isRepeat = true;
                printf("%d is repeat!\n", dev);
                break;
            }   
        }
        if (!isRepeat) {
            printf("dev: %d, isrepeat: %d\n", dev, isRepeat);
           devices.push_back(dev);
        }
    }
    std::vector<std::thread> test_threads;
    std::atomic<bool> isStop{false};
    for (int i = 0; i < loop; i++) {
        printf("\n*************分割线**************\n\n");
        printf("%dth process start!!\n", i+1);
        for (int j = 0; j < devices.size(); j++) {
            test_threads.push_back(std::thread(singleDevAllProc, devices[j], devices, devClientId, &isStop));
            printf("device[%d] start running!!\n", devices[j]);
        }
        for (int j = 0; j < deviceNum; j++) {
            isStop.store(true);
            if (test_threads[j].joinable()) {
                test_threads[j].join();
                printf("device[%d] stop running!!\n", devices[j]);
            }
        }
        test_threads.clear();
    }
    return 0;
}

Makefile文件参考

编译需要的Makefile文件如下：

#
#loading path
#--------------------------------------------------------------------------------------------------------------------------------------------------
CXXFLAGS := -std=c++11\
        -Werror\
        -fstack-protector-strong\
        -fPIE -pie\
        -O2\
        -g\
        -s\
        -Wl,-z,relro\
        -Wl,-z,now\
        -Wl,-z,noexecstack\
        -Wl,--copy-dt-needed-entries
HCCL_INC_DIR = ${ASCEND_DIR}/include
HCCL_LIB_DIR = ${ASCEND_DIR}/lib64
ACL_INC_DIR = ${ASCEND_DIR}/include
ACL_LIB_DIR = ${ASCEND_DIR}/lib64
LIST = rping_test
#
#library flags
#--------------------------------------------------------------------------------------------------------------------------------------------------
LIBS = -L$(HCCL_LIB_DIR) -lhccl_plf\
        -L$(ACL_LIB_DIR) -lascendcl
INCLUDEDIRS = -I$(HCCL_INC_DIR)\
                -I$(ACL_INC_DIR)
#
#make
#--------------------------------------------------------------------------------------------------------------------------------------------------
all:
	@mkdir -p bin
	g++ $(CXXFLAGS) rping_test.cc $(INCLUDEDIRS) -o rping_test $(LIBS)
	@printf "\nRPing_test compile completed\n" 
	mv $(LIST) ./bin
.PHONY: clean
clean:
	rm -rf ./bin/*_test

依赖环境变量

编译本节所示样例代码前需配置如下环境变量。

source /usr/local/Ascend/ascend-toolkit/set_env.sh
export ASCEND_DIR=/usr/local/Ascend/ascend-toolkit/latest

其中“/usr/local/Ascend”为CANN软件使用root用户安装的默认安装路径，如CANN软件使用普通用户安装或指定路径安装，请自行替换。

编译执行样例

  1. 执行“make”命令，会在bin目录下面编译生成“rping_test”可执行文件。
    make
  2. 执行如下命令，运行“rping_test”可执行文件。
    ./bin/rping_test <Number of cycles> <client NPU devlogicId> <target NPU devlogicId>
    • <Number of cycles>：从RPing功能初始化到释放RPing资源的全流程执行次数。
    • <client NPU devlogicId>：client NPU的Device逻辑ID。
    • <target NPU devlogicId>：target NPU的Device逻辑ID，若有多个target NPU，target NPU的逻辑ID直接使用空格间隔即可

    命令示例：

    ./bin/rping_test 1 0 1 2 3 4 5 6 7

    代表RPing功能执行一次，client NPU为Device 0，target NPU为Device 1到Device 7共7个NPU。