Embedded Processors and Peripherals

[kre8si]

Hi,

I use a System with ML507 with the PLBv46 PCIe bridge connected to BRAM and a xps_central_dma.

My Windows-Driver (WDF) works well. But the Performance ist nor realy good:

DMA-Read from HostPC is good with 140MB/s.

DMA-Write is not so good with 27 MB/s.

PIO is much worst

PIO-Read 2,5 MB/s
PIO-Write 25 MB/s

Got anyone a solution for this slow Transfers?

[kre8si]

I use a System with ML507 with the PLBv46 PCIe bridge connected to BRAM and a xps_central_dma.

My Windows-Driver (WDF) works well. But the Performance ist nor realy good:

DMA-Read from HostPC is good with 140MB/s.

DMA-Write is not so good with 27 MB/s.

PIO is much worst

PIO-Read 2,5 MB/s
PIO-Write 25 MB/s

Got anyone a solution for this slow Transfers?

[kre8si]

DMA-Read from HostPC is good with 140MB/s.

[kre8si]

DMA-Write is not so good with 27 MB/s.

[kre8si]

PIO is much worst

[kre8si]

PIO-Read 2,5 MB/s
PIO-Write 25 MB/s

[kre8si]

Got anyone a solution for this slow Transfers?

[kre8si]

Are there any experience with the PLB-PCIE-Bridge?

Can you measure your transferrate with QueryperformanceCounter and post it here to compare it?

It would be very nice!

[bioboost]

Hi

Did you ever find the solution to the performance problem ?

I'm having the same problem with my project. DMA transfers from DDR2 (Xilinx board) to the host PC RAM achieve throughputs above 100 MB/s, but data transfers from Host RAM to DDR2 only reach a maximum of 24 MB/s.

I even get a transfer rate of 180 MB/s from blockram to host ram, but from host ram to blockram, again, 24 MB/s.

Thanks in advance

[tmcb]

hello

I am using pcie in xps,but the speed from DMA to HostPC is 90MB/s with x1 lane. How can I improve it ? How you reached a speed of 180MB/s?

thanks