TDA4VM: C66

yue su

Part Number: TDA4VM

What is the physical address of C66？0x00800000？Why is there no change in performance when I use memcpy to calculate data at this address？

3 年多前

0 Nancy Wang 3 年多前

TI__Guru** 110395 points

yue su 说：
What is the physical address of C66？0x00800000

0x00800000 是 L2 的地址。

请参考TRM Table 2-6. C66SS0/1 Memory Map

yue su 说：
Why is there no change in performance when I use memcpy to calculate data at this address？

请详细说明一下。

0 yue su 3 年多前回复 Nancy Wang

我直接用memcpy把数据搬运C66的L2的这个地址，函数运行时间并没有变化，是不是这个地址不正确，真正的L2的物理地址要做一定的偏移？

0 Nancy Wang 3 年多前回复 yue su

TI__Guru** 110395 points

yue su 说：
函数运行时间并没有变化，

有代码示例吗？包括函数运行时间的测量也贴出来看一下，一般来说不需要偏移。

0 yue su 3 年多前回复 Nancy Wang

if ((coeffsHeight == 3) && (dilationHeight== 1) && (typeid(Tin) == typeid(uint8_t)) && height/strideHeight >= 8)
{
  printf("Sy-gPtrL2RAM:%p--------------------------------20220303_1\n", gPtrL2RAM); //gPtrL2RAM:0x00800000
  uint32_t uiMemUsedSize = 0;

  //Input
  Tin  *pInData = (Tin *)(uiMemUsedSize + (uint32_t)gPtrL2RAM);   
  uiMemUsedSize += (uint32_t)(numInChannels * inChPitch * sizeof(Tin));

  appMemCacheWb(pInChannel, numInChannels * inChPitch * sizeof(Tin));
  appMemCacheWb(pInData, numInChannels * inChPitch * sizeof(Tin));
  
  app_udma_copy_2d_prms_t prms_2d_pInBuf;
  appUdmaCopy2DPrms_Init(&prms_2d_pInBuf);
  prms_2d_pInBuf.width        = inChPitch * sizeof(Tin);
  prms_2d_pInBuf.height       = numInChannels;
  prms_2d_pInBuf.dest_pitch   = inChPitch * sizeof(Tin);
  prms_2d_pInBuf.src_pitch    = inChPitch * sizeof(Tin);
  prms_2d_pInBuf.dest_addr    = Udma_appVirtToPhyFxn((void *)pInData, 1, NULL);  //Udma_appVirtToPhyFxn
  prms_2d_pInBuf.src_addr     = Udma_appVirtToPhyFxn((void *)pInChannel, 1, NULL);  //appMemGetVirt2PhyBufPtr 
  //prms_2d_pInBuf.dest_addr    = (uint64_t)pInData;
  //prms_2d_pInBuf.src_addr     = (uint64_t)pInChannel;  
  appUdmaCopy2D(NULL, &prms_2d_pInBuf, 1);

  appMemCacheInv(pInData, numInChannels * inChPitch * sizeof(Tin));

  //Weight
  Tw   *pWeightData = (Tw *)(uiMemUsedSize + (uint32_t)gPtrL2RAM);
  uiMemUsedSize += (uint32_t)(numOutChannels * numInChannels * coeffsHeight * coeffsWidth * sizeof(Tw));

  appMemCacheWb(pCoeffs, numOutChannels * numInChannels * coeffsHeight * coeffsWidth * sizeof(Tw));
  appMemCacheWb(pWeightData, numOutChannels * numInChannels * coeffsHeight * coeffsWidth * sizeof(Tw));

  app_udma_copy_2d_prms_t prms_2d_pWeightBuf;
  appUdmaCopy2DPrms_Init(&prms_2d_pWeightBuf);
  prms_2d_pWeightBuf.width        = coeffsHeight * coeffsWidth * sizeof(Tw);
  prms_2d_pWeightBuf.height       = numOutChannels * numInChannels;
  prms_2d_pWeightBuf.dest_pitch   = coeffsHeight * coeffsWidth * sizeof(Tw);
  prms_2d_pWeightBuf.src_pitch    = coeffsHeight * coeffsWidth * sizeof(Tw);  
  prms_2d_pWeightBuf.dest_addr    = Udma_appVirtToPhyFxn((void *)pWeightData, 1, NULL); 
  prms_2d_pWeightBuf.src_addr     = Udma_appVirtToPhyFxn((void *)pCoeffs, 1, NULL);  
  //prms_2d_pWeightBuf.dest_addr    = (uint64_t)pWeightData; 
  //prms_2d_pWeightBuf.src_addr     = (uint64_t)pCoeffs;
  appUdmaCopy2D(NULL, &prms_2d_pWeightBuf, 1);   

  appMemCacheInv(pWeightData, numOutChannels * numInChannels * coeffsHeight * coeffsWidth * sizeof(Tw));

  //Bias
  Tb   *pBiasData = (Tb *)(uiMemUsedSize + (uint32_t)gPtrL2RAM);
  uiMemUsedSize += (uint32_t)(numOutChannels * sizeof(Tb));

  appMemCacheWb(pBias, numOutChannels * sizeof(Tb));
  appMemCacheWb(pBiasData, numOutChannels * sizeof(Tb));

  app_udma_copy_1d_prms_t prms_1d_pBaisBuf;
  appUdmaCopy1DPrms_Init(&prms_1d_pBaisBuf);
  prms_1d_pBaisBuf.dest_addr    = Udma_appVirtToPhyFxn((void *)pBiasData, 1, NULL); 
  prms_1d_pBaisBuf.src_addr     = Udma_appVirtToPhyFxn((void *)pBias, 1, NULL); 
  //prms_1d_pBaisBuf.dest_addr    = (uint64_t)pBiasData; 
  //prms_1d_pBaisBuf.src_addr     = (uint64_t)pBias;
  prms_1d_pBaisBuf.length       = numOutChannels * sizeof(Tb); 
  appUdmaCopy1D(NULL, &prms_1d_pBaisBuf); 

  appMemCacheInv(pBiasData, numOutChannels * sizeof(Tb));       

  Tacc  *pOutData = (Tacc *)(uiMemUsedSize + (uint32_t)gPtrL2RAM);
  memset(pOutData, 0, numOutChannels * outChPitch * sizeof(Tacc));
  uiMemUsedSize += (uint32_t)(numOutChannels * outChPitch * sizeof(Tacc));

  ullCyclesStart = get_tsc();

  TIDL_refConv2dKernel_i8u_c8s_o32s_3x3s1d1(pInData, pWeightData, pBiasData, pOutData , &min, &max, numTotRoi, numGroups, numInChannels,
    numOutChannels, inChPitch, outChPitch, width, height, inImPitch, outImPitch,
    coeffsWidth, coeffsHeight, dilationWidth, dilationHeight, strideWidth, strideHeight, params->enableBias);
  
  ullCyclesEnd = get_tsc();   
  
  printf("Sy-Conv cost cycles %llu\n", (ullCyclesEnd - ullCyclesStart));

  appMemCacheWb(pOutData, numOutChannels * outChPitch * sizeof(Tacc));
  appMemCacheWb(accPtr, numOutChannels * outChPitch * sizeof(Tacc));

  app_udma_copy_2d_prms_t prms_2d_pOutBuf;
  appUdmaCopy2DPrms_Init(&prms_2d_pOutBuf);
  prms_2d_pOutBuf.width        = outChPitch * sizeof(Tacc);
  prms_2d_pOutBuf.height       = numOutChannels;
  prms_2d_pOutBuf.dest_pitch   = outChPitch * sizeof(Tacc);
  prms_2d_pOutBuf.src_pitch    = outChPitch * sizeof(Tacc);
  prms_2d_pOutBuf.dest_addr    = Udma_appVirtToPhyFxn((void *)accPtr, 1, NULL);  //Udma_appVirtToPhyFxn
  prms_2d_pOutBuf.src_addr     = Udma_appVirtToPhyFxn((void *)pOutData, 1, NULL);  //Udma_appPhyToVirtFxn
  //prms_2d_pOutBuf.dest_addr    = (uint64_t)accPtr;
  //prms_2d_pOutBuf.src_addr     = (uint64_t)pOutData;  
  appUdmaCopy2D(NULL, &prms_2d_pOutBuf, 1);

  appMemCacheInv(accPtr, numOutChannels * outChPitch * sizeof(Tacc));  
}

这段代码是我用UDMA拷贝做的，现在数据搬运的结果是对的，但是测试cycles基本没变化，UDMA搬运数据性能不是应该会快很多嘛

是我UDMA拷贝用的不对还是L2没用起来？

我地址没用这个函数（Udma_appVirtToPhyFxn）偏移直接用它本来的地址就会报错：UDMA : ERROR: TR Response not completed!!

gPtrL2RAM这个地址就是0x00800000

0 Nancy Wang 3 年多前回复 yue su

TI__Guru** 110395 points

这个问题建议您到英文论坛咨询看一下，会有相关专家给您提供支持。

0 yue su 3 年多前回复 Nancy Wang

好的，谢谢

0 Nancy Wang 3 年多前回复 yue su

TI__Guru** 110395 points

不客气，我会暂时将该贴关闭。

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TDA4VM: C66