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TDA4VH-Q1: csitx node is slow

gavin zhang
Prodigy 100 points

Part Number: TDA4VH-Q1

Hi Ti Teams,

I added a csitx node as output .

capture->ldc->mosaic->convert_node->csitx

FPS is 23.

The stat of the graph is below,


GRAPH: app_multi_cam_graph (#nodes = 9, #executions = 415)
NODE: CAPTURE1: capture_node0: avg = 4503 usecs, min/max = 91 / 51003 usecs, #executions = 415
NODE: VPAC_LDC1: ldc_node: avg = 3076 usecs, min/max = 3050 / 3933 usecs, #executions = 415
NODE: VPAC_MSC1: mosaic_node: avg = 14425 usecs, min/max = 13856 / 41294 usecs, #executions = 415
NODE: A72-0: convert_node->CSITXNode: avg = 29076 usecs, min/max = 28740 / 32194 usecs, #executions = 415
NODE: CSITX: CSITXNode: avg = 42757 usecs, min/max = 42680 / 43478 usecs, #executions = 415
NODE: VPAC_MSC1: scaler_node: avg = 4639 usecs, min/max = 4550 / 5340 usecs, #executions = 415
NODE: A72-0: stream_output_node: avg = 313 usecs, min/max = 285 / 358 usecs, #executions = 415
NODE: DISPLAY1: DisplayNode: avg = 8150 usecs, min/max = 60 / 16619 usecs, #executions = 415
NODE: A72-0: capture_write_node: avg = 12 usecs, min/max = 10 / 30 usecs, #executions = 415

PERF: FILEIO: avg = 0 usecs, min/max = 4294967295 / 0 usecs, #executions = 0
PERF: TOTAL: avg = 42816 usecs, min/max = 6890 / 83290 usecs, #executions = 130

PERF: TOTAL: 23.35 FPS

The csitx node cost 42757us.

Can I reduce the exec time of csitx?

  • 0
    TI__Guru* 90001 points

    Hi,

    May I know what is the data rate the csi-tx is being configured with?

    what is the resolution of the image being transferred?

    What is the target fps you are trying to achieve?

    Regards,

    Nikhil

  • 0 in reply to Nikhil Dasan
    Prodigy 100 points

    Hi Nikhil,

    Thanks for your reply.

    I've found the csi-tx is not the reason. The data rate of csi-tx is 240_TO_320_MBPS.

    When I use one capture node to capture 10 cameras, the csi-tx cannot output correctly and I configured the data rate of csi-tx with 240_TO_320_MBPS.

    Nikhil Dasan said:
    What is the target fps you are trying to achieve?

    30 FPS.

    The data rate of csitx has be changed to 390_TO_450.

    I  use 3 capture node (2+4+4), 10 cameras. The FPS is 29.9.

    I use 1 capture node, 10 cameras. The FPS is 25~27.

    Regards,

    Zhang

  • 0 in reply to gavin zhang
    TI__Guru* 90001 points

    Hi Zhang,

    May I know what is the resolution of the camera that is being used? 

    Also, I believe you are passing 10 cameras to 2 separate VPACs or is it going to single VPAC?

    By 3 capture nodes, do you mean each capture node is on 3 csi instance? or 3 capture nodes are on single csi-rx instance?

    Regards,

    nikhil

  • 0 in reply to Nikhil Dasan
    Prodigy 100 points
    Nikhil Dasan said:
    May I know what is the resolution of the camera that is being used? 

    1920X1536 UYVY

    Nikhil Dasan said:
    I believe you are passing 10 cameras to 2 separate VPACs or is it going to single VPAC?

    Use 10 cameras to single VPAC.

    Nikhil Dasan said:
    By 3 capture nodes, do you mean each capture node is on 3 csi instance? or 3 capture nodes are on single csi-rx instance?

    ___________________________________________

    capture node0->csi0rx->2 cameras

    capture node1->csi1rx->4 cameras

    capture node2->csi2rx->4 cameras

    The FPS is 29.9.

    ___________________________________________

                           |->csi0rx ->2 cameras

    capture node0|->csi1rx ->4 cameras

                           |->csi2rx ->4 cameras

    The FPS is 25~27.

    ___________________________________________

    Regards,

    Zhang

  • 0 in reply to gavin zhang
    TI__Guru* 90001 points

    Hi Zhang,

    Could you provide the performance stats for both use cases?

    i.e., with 30 FPS and with 25-27 FPS?

    Also to identify if this is because of capture node, could you disable all the other nodes and run just the capture node in the graph? Please let me know if you have already tried this usecase?

    Regards,

    Nikhil

  • 0 in reply to Nikhil Dasan
    Prodigy 100 points

    Hi Nikhil,

    I have tested these two cases.There are seems some issue in the capture node. I think you should test that.

    Nikhil Dasan said:
    Also to identify if this is because of capture node, could you disable all the other nodes and run just the capture node in the graph? Please let me know if you have already tried this usecase?

    I dont have time to test this usecae.

    Regards,

    Zhang

  • 0 in reply to gavin zhang
    TI__Guru* 90001 points

    Hi Zhang,

    Nikhil Dasan said:

    Could you provide the performance stats for both use cases?

    i.e., with 30 FPS and with 25-27 FPS?

    Could you provide me the performance stats for both usecase?

    Regards,

    Nikhil