[mythtv] Profile w/XvMC

[Daniel Thor Kristjansson]

I was just checking on the performance of my XVMC_pack_pblocks vs. the
new ffmpeg one (they are nearly identical). But I thought it might be
of some general interest. About 52% is outside our control in the closed
source nVidia driver, but mpeg2_decode_block_intra,
mpeg2_decode_block_non_intra, mpeg_decode_mb, clear_blocks_mmx,
XVMC_decode_mb are all worth some effort. This is compiled with
assertions and debugging, but otherwise at -O3 w/sse2.

-- Daniel

125556   26.0682  libmythtv-0.15.so.0.15.0 _nv0098XvMCstatic
68662    14.2557  libmythtv-0.15.so.0.15.0 _nv0165XvMCstatic
40649     8.4396  libmythavcodec-0.15.so.0.15.0 mpeg2_decode_block_intra
31345     6.5079  libmythavcodec-0.15.so.0.15.0 mpeg2_decode_block_non_intra
29259     6.0748  libmythavcodec-0.15.so.0.15.0 mpeg_decode_mb
28956     6.0119  libmythtv-0.15.so.0.15.0 _nv0192XvMCstatic
27980     5.8093  libmythavcodec-0.15.so.0.15.0 clear_blocks_mmx
17717     3.6784  libmythavcodec-0.15.so.0.15.0 XVMC_decode_mb
12607     2.6175  libmythavcodec-0.15.so.0.15.0 mpeg_decode_slice
10156     2.1086  libmythavcodec-0.15.so.0.15.0 mpeg_decode_motion
9976      2.0712  libc-2.3.3.so            (no symbols)
9339      1.9390  libmythtv-0.15.so.0.15.0 _nv0143XvMCstatic
8754      1.8175  libmythtv-0.15.so.0.15.0 _nv0107XvMCstatic
7536      1.5646  libmythtv-0.15.so.0.15.0 _nv0025XvMCstatic
6165      1.2800  libmythtv-0.15.so.0.15.0 AvFormatDecoder::MpegPreProcessPkt(AVStream*, AVPacket*)
6092      1.2648  libmythavcodec-0.15.so.0.15.0 XVMC_pack_pblocks
3911      0.8120  libpthread-0.10.so       (no symbols)
3834      0.7960  libmythavcodec-0.15.so.0.15.0 ff_mpeg1_find_frame_end
3733      0.7751  libmythtv-0.15.so.0.15.0 _nv0190XvMCstatic
2758      0.5726  libmythtv-0.15.so.0.15.0 _nv0146XvMCstatic
2120      0.4402  libmythavcodec-0.15.so.0.15.0 __i686.get_pc_thunk.bx
1782      0.3700  libmythavcodec-0.15.so.0.15.0 render_state
1707      0.3544  libmythavcodec-0.15.so.0.15.0 coeff_get
1538      0.3193  libmythavcodec-0.15.so.0.15.0 MPV_decode_mb
1425      0.2959  libmythavcodec-0.15.so.0.15.0 ifft_pass
1236      0.2566  libmythavcodec-0.15.so.0.15.0 a52_imdct_512
1054      0.2188  libmythavcodec-0.15.so.0.15.0 a52_decode_frame
1046      0.2172  libmythavcodec-0.15.so.0.15.0 XVMC_init_block
986       0.2047  libmythavcodec-0.15.so.0.15.0 ff_er_add_slice