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执行/opt/vc/src/hello_pi/hello_video下的例子，为了验证是否使用了GPU，所以需要检测GPU的使用情况
命令
1 sudo vcdbg reloc
没有执行例子前
0x37000000: free 106M [ 4] 0x3da79d40: used 576 (refcount 1 lock count 0, size 512, align 4, data 0x3da79d60, d0rual) ‘ILCS VC buffer pool‘ [ 3] 0x3da79f80: used 1.5M (refcount 1 lock count 8, size 1572864, align 4096, data 0x3da7a000, d1rual) ‘ARM FB‘ [ 2] 0x3dbfafa0: used 16K (refcount 1 lock count 0, size 16384, align 32, data 0x3dbfafc0, d0ruAl) ‘audioplus_tmp_buf‘ [ 1] 0x3dbfefe0: used 4.0K (refcount 1 lock count 0, size 0, align 4096, data 0x3dbff000, d1rual) ‘camera fast alloc arena‘ small allocs not requested
执行例子的过程中
0x37000000: free 81M [ 26] 0x3c0ade40: used 268K (refcount 1 lock count 1, size 274560, align 32, data 0x3c0ade60, d0Rual) ‘Vdec3 Msgbuf‘ [ 33] 0x3c0f0f00: used 956K (refcount 1 lock count 0, size 979200, align 4, data 0x3c0f0f20, d1Rual) ‘H264 dm_storage‘ [ 39] 0x3c1e0040: used 544 (refcount 1 lock count 0, size 256, align 256, data 0x3c1e0100, d3rual) ‘H264 dummy data partition‘ [ 38] 0x3c1e0260: used 14K (refcount 1 lock count 0, size 14000, align 64, data 0x3c1e0280, d3rual) ‘h264_top_context‘ 0x3c1e3980: free 32K [ 6] 0x3c1eb9c0: used 1.0M (refcount 1 lock count 0, size 1048576, align
对比可见，GPU的确在运行
更多命令请查看
sudo vcdbg help
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原文地址：http://www.cnblogs.com/weixinforspurs/p/5585173.html
