[Openchrome-users] XAA and fallback

[Mario Rugiero]

2012/3/24 Llu?s Batlle i Rossell <viric at viric.name>

> Hello,
>
> I'm trying a simple test... go to youtube with firefox and play a video.
> It uses to take quite enough of X cpu, firefox cpu and adobe flashplayer
> cpu.
>
> Looking at the 'X' part, all the cpu is used in memcpy.
>
> It looks like all painting goes through XAAPutImageFallback, which I
> imagine
> is not the fastest path.
>
> It's xorgserver 1.9.5, with the openchrome 0.2.905.
>
> This is the kind of backtrace I get:
>
> (gdb) bt
> #0  0xb732a0a6 in __memcpy_ia32 ()
>   from /nix/store/yb7w3wpd3d5cn0qs6y7l4lx7zcxg0z8m-glibc-2.13/lib/libc.so.6
> #1  0x00000078 in ?? ()
> #2  0xb6df1db1 in fbBlt (srcLine=0xaa0b1c00, srcStride=2560, srcX=0,
> dstLine=0xb2e89000,
>    dstStride=4096, dstX=608, width=2560, height=348, alu=3, pm=4294967295,
> bpp=32, reverse=0,
>    upsidedown=0) at fbblt.c:93
> #3  0xb6df2ceb in fbBltStip (src=0xaa0b1c00, srcStride=640, srcX=0,
> dst=0xb2e89000,
>    dstStride=1024, dstX=608, width=20480, height=348, alu=3,
> pm=4294967295, bpp=32)
>    at fbblt.c:944
> #4  0xb6df7e68 in fbPutZImage (pDrawable=0x8e79d50, pClip=0x8e79d80,
> alu=3, pm=4294967295,
>    x=19, y=273, width=640, height=348, src=0xaa0b1c00, srcStride=640) at
> fbimage.c:156
> #5  0xb6df86b6 in fbPutImage (pDrawable=0x8e79d50, pGC=0x8e60530,
> depth=24, x=19, y=273,
>    w=640, h=348, leftPad=0, format=2, pImage=0xaa0b1c00 "") at
> fbimage.c:105
> #6  0xb6d86bb2 in XAAPutImageFallback (pDraw=0x8e79d50, pGC=0x8e60530,
> depth=24, x=0, y=6,
>    w=640, h=348, leftPad=0, format=2, pImage=0xaa0b1c00 "") at
> xaaFallback.c:64
> #7  0xb6d991b0 in XAAPutImage (pDraw=0x8e79d50, pGC=0x8e60530, depth=24,
> x=0, y=6, w=640,
>    h=348, leftPad=0, format=2, pImage=0xaa0b1c00 "") at xaaImage.c:519
> #8  0xb6dd0a95 in cwPutImage (pDst=0x8e79d50, pGC=0x8e60530, depth=24,
>    x=<value optimized out>, y=<value optimized out>, w=640, h=348,
> leftPad=0, format=2,
>    pBits=0xaa0b1c00 "") at cw_ops.c:177
> #9  0x08125fea in damagePutImage (pDrawable=0x8e79d50, pGC=0x8e60530,
> depth=24, x=0, y=6,
>    w=640, h=348, leftPad=0, format=2, pImage=0xaa0b1c00 "") at damage.c:901
> #10 0x080fee48 in ProcShmPutImage (client=0x8e1a2d8) at shm.c:942
> #11 0x081000af in ProcShmDispatch (client=0x8e1a2d8) at shm.c:1204
> #12 0x08071e07 in Dispatch () at dispatch.c:432
> #13 0x08064f3c in main (argc=15, argv=0xbff81434, envp=0xbff81474) at
> main.c:291
>
> Any idea on reducing the cpu usage for video playing? Maybe it's just this
> xorg version?
>
> I wonder how mplayer can play the same video at 4% of cpu usage, while the
> flash player looks to take 40% cpu (only decoding, no?), firefox 30%, and
> the rest X.
>
> Attached, dmesg and xorg logs.
>
> Regards,
> Llu?s.
>
> _______________________________________________
> openchrome-users mailing list
> openchrome-users at openchrome.org
> http://wiki.openchrome.org/mailman/listinfo/openchrome-users
> Main page:
> http://www.openchrome.org
> Wiki:
> http://wiki.openchrome.org
> User Forum:
> http://wiki.openchrome.org/tikiwiki/tiki-view_forum.php?forumId=1
>
Are you sure you are not using xv or xvmc with mplayer? This could affect
CPU use, since it uses the GPU for a part of the decoding.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://wiki.openchrome.org/pipermail/openchrome-users/attachments/20120324/4f7f8ab6/attachment.html