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  • TI Thinks Resolved

DRA710: ipc in LATENCY is very high, how to optimize it

Intellectual 720 points

Replies: 2

Views: 70

Part Number: DRA710

hi, experts

we are using ipu1 ipcout -> ipc_in a15 linux, and the cpu is not very high

(CPU: 52.2% usr  4.0% sys  0.0% nic 43.7% idle  0.0% io  0.0% irq  0.0% sirq)

( [HOST] [IPU1-0]  65973.022906 s:  LOAD: CPU: 75.1% HWI: 9.7%, SWI:18.8%)

[HOST] [HOST ] 65734.800036 s: [ IPC_IN_0 ] Link Statistics,
[HOST] [HOST ] 65734.800036 s: ******************************
[HOST] [HOST ] 65734.800036 s:
[HOST] [HOST ] 65734.800036 s: Elapsed time = 242389 msec
[HOST] [HOST ] 65734.800036 s:
[HOST] [HOST ] 65734.800036 s: Get Full Buf Cb = 99.97 fps
[HOST] [HOST ] 65734.800067 s: Put Empty Buf Cb = 50.0 fps
[HOST] [HOST ] 65734.800067 s: Driver/Notify Cb = 51.69 fps
[HOST] [HOST ] 65734.800067 s:
[HOST] [HOST ] 65734.800067 s: Input Statistics,
[HOST] [HOST ] 65734.800067 s:
[HOST] [HOST ] 65734.800067 s: CH | In Recv | In Drop | In User Drop | In Process
[HOST] [HOST ] 65734.800097 s: | FPS | FPS | FPS | FPS
[HOST] [HOST ] 65734.800097 s: --------------------------------------------------
[HOST] [HOST ] 65734.800097 s: 0 | 25. 0 0. 0 0. 0 25. 0
[HOST] [HOST ] 65734.800097 s: 1 | 25. 0 0. 0 0. 0 25. 0
[HOST] [HOST ] 65734.800128 s:
[HOST] [HOST ] 65734.800128 s: Output Statistics,
[HOST] [HOST ] 65734.800128 s:
[HOST] [HOST ] 65734.800128 s: CH | Out | Out | Out Drop | Out User Drop
[HOST] [HOST ] 65734.800128 s: | ID | FPS | FPS | FPS
[HOST] [HOST ] 65734.800128 s: ---------------------------------------------
[HOST] [HOST ] 65734.800128 s: 0 | 0 25. 0 0. 0 0. 0
[HOST] [HOST ] 65734.800158 s: 1 | 0 25. 0 0. 0 0. 0
[HOST] [HOST ] 65734.800158 s:
[HOST] [HOST ] 65734.800158 s: [ IPC_IN_0 ] LATENCY,
[HOST] [HOST ] 65734.800158 s: ********************
[HOST] [HOST ] 65734.800189 s: Local Link Latency : Avg = 4 us, Min = 0 us, Max = 91 us,
[HOST] [HOST ] 65734.800189 s: Source to Link Latency : Avg = 45586 us, Min = 24584 us, Max = 105747 us,
[HOST] [HOST ] 65734.800189 s:
[HOST] [HOST ] 65734.800189 s: [ IPC_IN_0 ] Detailed IPC Latency Statistics [ IPU1-0 -> HOST ] ,

please advice if anything wrong.

vision_sdk: 3.2

ipc:3_45_00_00

thanks.

regards wen

  • Hi,

    This is not IPC link latency, this is the total latency from source upto this link.. IPC link latency is just 4us..

    Please check previous links before IPC links.

    Rgds,

    Brijesh

  • In reply to Brijesh Jadav:

    hi, Brijesh

    i will check the previous link and let you know the result.

    thanks.

    regards, wen

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