imx6dl flexcan performance

starimx — Wed, 05 May 2021 18:37:44 GMT

Hi All ,

I have one performance issue on flexcan application test

preconditions:

CAN Baud:125Kbps

NODE A:

i am using socketcan FD.read and write for transmitting and receiving10 CAN frames with each frame data length 16 bytes. with delay of 100 ms sec, then next Frame will be sent

10 Frame consecutive write also success

here all the can send are success

but receiving node B:

few last 8/9th FRAME are not read, with following node B CAN status

shell ifconfig can0
can0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP RUNNING NOARP MTU:16 Metric:1
RX packets:19263 errors:2 dropped:0 overruns:0 frame:2
TX packets:4028 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:147976 (144.5 KiB) TX bytes:8064 (7.8 KiB)
Interrupt:35

to improvise,

1. i added a delay in Node A every CAN frame by delay 20 ms with usleep,

2. Node B works neatly reads all frames successfully

anyone faced issue, i am using standard linux kernel 4.19 yocto build

Re: imx6dl flexcan performance

igorpadykov — Thu, 06 May 2021 07:24:44 GMT

Hi Anith

may be recommended to test this case with two Sabre SD boards and Demo Image

i.MX 6QuadPlus, i.MX 6Quad, i.MX 6DualLite, i.MX 6SoloX

use simple can test:

https://source.codeaurora.org/external/imx/imx-test/tree/test/can/doc/FSL-UT-CAN-003.txt?h=imx_4.19.35_1.0.0

Best regards
igor

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imx6dl flexcan performance

Re: imx6dl flexcan performance