完全一样的程序，264压缩，在NFS文件系统运行时DSP占用才40%，但是建立UBI文件系统运行时DSP占用高达90%！！！
这会是神马原因？ 想不通啊
平台DM3730 DVSDK4.03，kernel 2.6.32
./tvp5158_d1_ti -v test.264
Encode demo started.
writer: bufidx=0, test_phy_addr=87fee000
writer: bufidx=1, test_phy_addr=88054000
==nfs 运行时输出
ARM Load: 12% DSP Load: 39% Video fps: 25 fps Video bit rate: 2029 kbps Sound bit rate: 0 kbps Time: 00:00:09 Demo: Encode Display: D1 PAL Video Codec: H.264 BP Resolution: 720x576 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 9% DSP Load: 39% Video fps: 25 fps Video bit rate: 1872 kbps Sound bit rate: 0 kbps Time: 00:00:10 Demo: Encode Display: D1 PAL Video Codec: H.264 BP Resolution: 720x576 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 10% DSP Load: 38% Video fps: 25 fps Video bit rate: 2087 kbps Sound bit rate: 0 kbps Time: 00:00:12 Demo: Encode Display: D1 PAL Video Codec: H.264 BP Resolution: 720x576 Sound Codec: N/A Sampling Freq: N/A
==UBI文件系统运行时输出
ARM Load: 8% DSP Load: 89% Video fps: 18 fps Video bit rate: 1386 kbps Sound bit rate: 0 kbps Time: 00:00:20 Demo: Encode Display: D1 PAL Video Codec: H.264 BP Resolution: 720x576 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 9% DSP Load: 89% Video fps: 18 fps Video bit rate: 1163 kbps Sound bit rate: 0 kbps Time: 00:00:22 Demo: Encode Display: D1 PAL Video Codec: H.264 BP Resolution: 720x576 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 9% DSP Load: 89% Video fps: 18 fps Video bit rate: 1602 kbps Sound bit rate: 0 kbps Time: 00:00:23 Demo: Encode Display: D1 PAL Video Codec: H.264 BP Resolution: 720x576 Sound Codec: N/A Sampling Freq: N/A