TI中文支持网Part Number:AM3359Other Parts Discussed in Thread:SYSCONFIG
大家好，遇到一个问题，请教下，移植SGX驱动后，使用Qt eglfs模式启动app，程序能正常运行但是切换界面之类的ui操作总是很卡，相比于linuxfb模式慢很多，请问下这是什么原因啊，使用了gpu不是应该更快才对嘛。
使用的是：Graphics_SDK_4_09_00_01，Qt5.6.1
sgx加载看日志没有问题，打印了一下sgx的clock，看着也是正确的
[20267.741293] PVR: PVRCore_Init
[20267.754500] PVR: PVRSRVDriverProbe(pDevice=bf0ed218)
[20267.759763] /home/huangxin/qt58/Graphics_SDK_4_05_00_03_new/GFX_Linux_KM/services4/system/ti335x/sysconfig.c SysInitialise 327[20267.771879] /home/huangxin/qt58/Graphics_SDK_4_05_00_03_new/GFX_Linux_KM/services4/system/ti335x/sysconfig.c SysLocateDevices 208[20267.784215] /home/huangxin/qt58/Graphics_SDK_4_05_00_03_new/GFX_Linux_KM/services4/system/ti335x/sysconfig.c EnableSystemClocksWrap 192[20267.797066] /home/huangxin/qt58/Graphics_SDK_4_05_00_03_new/GFX_Linux_KM/services4/system/ti335x/sysutils_linux_wqueue_compat.c EnableSystemClocks 269[20267.811367] PVR: EnableSystemClocks: Enabling System Clocks
[20267.817286] PVR: GPTIMER11 clock is 24MHz
[20267.821533] PVR: OSUnMapPhysToLin: unmapping 4 bytes from fa04a054
[20267.828026] PVR: OSUnMapPhysToLin: unmapping 4 bytes from fa04a038
[20267.872169] 111 EnableSGXClocks: CPU Clock is 0Mhz
[20267.877176] ###### EnableSGXClocks res = 0
[20267.881461] 222 EnableSGXClocks: SGX Functional Clock is 200Mhz
[20267.887995] PVR: PVRCore_Init: major device 247
使用strace跟踪了下程序执行情况，发现相对于linuxfb，eglfs模式多了很多如下信息（mmap2以及大量的ioctl）：
5349 15:01:43.621937 mmap2(NULL, 1441792, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x51e00000 <0.000249>
5349 15:01:43.631173 mmap2(NULL, 1441792, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x51ff9000 <0.000103>
5349 15:01:43.640943 munmap(0x51e00000, 1441792) = 0 <0.000447>
5349 15:01:43.672383 mmap2(NULL, 1441792, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x51e00000 <0.000293>
5349 15:01:43.776001 munmap(0x51ff9000, 1441792) = 0 <0.000433>
5349 15:01:43.776860 munmap(0x51e00000, 1441792) = 0 <0.000399>
5349 15:01:43.803809 clock_gettime(CLOCK_MONOTONIC, {14708, 570145672}) = 0 <0.000064>
5349 15:01:43.804370 clock_gettime(CLOCK_MONOTONIC, {14708, 570467713}) = 0 <0.000034>
5349 15:01:43.871860 mmap2(NULL, 3149824, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x51e00000 <0.000265>
5349 15:01:43.873360 ioctl(5, 0xc01c6761, 0xbec26c5c) = 0 <0.000156>
5349 15:01:43.873908 ioctl(5, 0xc01c6746, 0xbec26b3c) = 0 <0.000083>
5349 15:01:43.874665 ioctl(5, 0xc01c6761, 0xbec26c5c) = 0 <0.000106>
请问下这是什么原因，以及eglfs比linuxfb慢，这个正常嘛？
xin huang：
忘记说了，内核是3.2.0
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Nancy Wang：
建议您到英文论坛咨询，会有相关专家给您提供支持，谢谢！
e2e.ti.com/…/processors-forum
