海思移植QT，启动时UI延时很久出现

最近移植了qt5.9到hisi3519v101开发板上，按照论坛里相关大佬的移植步骤操作，目前已经能成功运行demo程序并显示出ui，但是有点问题：
[code]/nfsroot # ./hi3519
============= MipiDev 0, SetMipiAttr enWset mipi phy attr successful!
DRMode: 0
SAMPLE_COMM_ISP_Sensor_Regiter_callback isp_dev = 0
Func: SAMPLE_COMM_ISP_Init, Line: 691, WDR Mode: 0
stPubAttr (0, 0, 2592, 1944, 30.000000)
linear mode
===imx326 linear 2592x1944 5M30fps Init OK!===
Func: SAMPLE_COMM_ISP_Init, Line: 716 end IspDev:0.
ISP Dev 0 HI_MPI_ISP_Run
u32Width:240, u32Square:1
register cm :09 = val: e0630400
LCD initial end
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
QFSFileEngine::map: Mapping a file beyond its size is not portable
Application Run success ![/code]

以上是运行时的log，系统初始化完成后，就出现map警告，大概需要10s的时间才出现application run success的提示，此时UI才出现，有没有大佬了解map函数是哪里执行的？