[Openchrome-users] [openChrome] #409: Poor XVideo performance on VX800

[OpenChrome Trac]

#409: Poor XVideo performance on VX800
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Reporter:  rafalbilski  |       Owner:  somebody
    Type:  defect       |      Status:  new     
Priority:  minor        |   Component:  xv      
 Version:               |    Keywords:          
Blocking:               |   Blockedby:          
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 Motherboard is VIA VB8003 with VX800 chipset (PCIE bus).
 Driver doesn't print anything. With debug and xv-debug too.
 Running

 % mplayer -quiet  -nosound -benchmark Pobieranie/FTRMA0617.avi

 as a test is causing about one second video freeze in XVideo window
 every one second. Mplayer reports very poor performance:

 BENCHMARKs: VC:  65.180s VO: 129.275s A:   0.000s Sys:   2.620s =
 197.075s

 BENCHMARK%: VC: 33.0736% VO: 65.5967% A:  0.0000% Sys:  1.3297% =
 100.0000%

 Value of "count" in via_video.c->Flip() regulates freeze time.
 I think it is caused by viaOverlayGetV1V3Format() which is called by
 Upd_Video():
 *pVidCtl |= V1_SWAP_HW_HQV;
 Documentation for VX800 is available, but it isn't informative. So
 it is only my guess that V1_SWAP_HW_HQV is valid only when XV window is
 connected to XVMC renderer. I think for ordinary XVideo
 window it should be set to V1_SWAP_SW.
 Running mplayer benchmark with this change and loop set to "(1 << 32) -
 1":

 BENCHMARKs: VC:  41.677s VO:  16.636s A:   0.000s Sys:   2.065s =
 60.378s

 BENCHMARK%: VC: 69.0275% VO: 27.5528% A:  0.0000% Sys:  3.4197% =
 100.0000%

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Ticket URL: <http://www.openchrome.org/trac/ticket/409>
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