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

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