[mythtv] Watch Recordings is slow with SVN on my Epia

[Daan de Beer]

Hello All,

As advised, I profiled my system using OProfile, but it seems I can not use 
any profiling events, since my CPU is not supported or something. I enabled 
all APIC options, disabled SMP and compiled the oprofile kernel support as 
module. Profiling does work, so I do not know wether or not it is a problem 
that only timing is supported.

Results from profiling:

pvr1 linux # opreport
CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
          TIMER:0|
  samples|      %|
------------------
     2159 49.4050 vmlinux
     1775 40.6178 libfb.so
      193  4.4165 libc-2.4.so
       79  1.8078 libjpeg.so.62.0.0
       55  1.2586 libqt-mt.so.3.3.6
       35  0.8009 libz.so.1.2.3
       24  0.5492 x11vnc
       15  0.3432 Xorg
        8  0.1831 libpng12.so.0.12.0
        5  0.1144 bash
        5  0.1144 libfreetype.so.6.3.8
        3  0.0686 libxaa.so
        2  0.0458 ld-2.4.so
        2  0.0458 libX11.so.6.2.0
        2  0.0458 libfontconfig.so.1.0.4
        1  0.0229 oprofiled
        1  0.0229 libstdc++.so.6.0.8
        1  0.0229 libXrender.so.1.3.0
        1  0.0229 via_drv.so
        1  0.0229 libdri.so
        1  0.0229 mouse_drv.so
        1  0.0229 libmythtv-0.19.so.0.19.0
        1  0.0229 via_rhine


pvr1 linux # opreport -xf --merge tgid
CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
          TIMER:0|
  samples|      %|
------------------
     2159 49.4050 /usr/src/linux-2.6.17-suspend2-r4/vmlinux
     1775 40.6178 /usr/lib/xorg/modules/libfb.so
      193  4.4165 /lib/libc-2.4.so
       79  1.8078 /usr/lib/libjpeg.so.62.0.0
       55  1.2586 /usr/qt/3/lib/libqt-mt.so.3.3.6
       35  0.8009 /lib/libz.so.1.2.3
       24  0.5492 /usr/bin/x11vnc
       15  0.3432 /usr/bin/Xorg
        8  0.1831 /usr/lib/libpng12.so.0.12.0
        5  0.1144 /bin/bash
        5  0.1144 /usr/lib/libfreetype.so.6.3.8
        3  0.0686 /usr/lib/xorg/modules/libxaa.so
        2  0.0458 /lib/ld-2.4.so
        2  0.0458 /usr/lib/libX11.so.6.2.0
        2  0.0458 /usr/lib/libfontconfig.so.1.0.4
        1  0.0229 /usr/bin/oprofiled
        1  0.0229 /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6.0.8
        1  0.0229 /usr/lib/libXrender.so.1.3.0
        1  0.0229 /usr/lib/xorg/modules/drivers/via_drv.so
        1  0.0229 /usr/lib/xorg/modules/extensions/libdri.so
        1  0.0229 /usr/lib/xorg/modules/input/mouse_drv.so
        1  0.0229 /usr/local/lib/libmythtv-0.19.so.0.19.0

pvr1 mythtv # opreport -c
warning: /via_rhine could not be found.
CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
samples  %        app name                 symbol name
-------------------------------------------------------------------------------
1860     42.5629  vmlinux                  acpi_processor_idle
  1860     100.000  vmlinux                  acpi_processor_idle [self]
-------------------------------------------------------------------------------
1775     40.6178  libfb.so                 (no symbols)
  1775     100.000  libfb.so                 (no symbols) [self]
-------------------------------------------------------------------------------
206       4.7140  vmlinux                  acpi_safe_halt
  206      100.000  vmlinux                  acpi_safe_halt [self]
-------------------------------------------------------------------------------
193       4.4165  libc-2.4.so              (no symbols)
  193      100.000  libc-2.4.so              (no symbols) [self]
-------------------------------------------------------------------------------
79        1.8078  libjpeg.so.62.0.0        (no symbols)
  79       100.000  libjpeg.so.62.0.0        (no symbols) [self]
-------------------------------------------------------------------------------
55        1.2586  libqt-mt.so.3.3.6        (no symbols)
  55       100.000  libqt-mt.so.3.3.6        (no symbols) [self]
-------------------------------------------------------------------------------
36        0.8238  vmlinux                  get_page_from_freelist
  36       100.000  vmlinux                  get_page_from_freelist [self]
-------------------------------------------------------------------------------
35        0.8009  libz.so.1.2.3            (no symbols)
  35       100.000  libz.so.1.2.3            (no symbols) [self]
-------------------------------------------------------------------------------
24        0.5492  x11vnc                   (no symbols)
  24       100.000  x11vnc                   (no symbols) [self]
-------------------------------------------------------------------------------
15        0.3432  Xorg                     (no symbols)
  15       100.000  Xorg                     (no symbols) [self]
-------------------------------------------------------------------------------
10        0.2288  vmlinux                  __copy_from_user_ll
  10       100.000  vmlinux                  __copy_from_user_ll [self]
-------------------------------------------------------------------------------
9         0.2059  vmlinux                  __copy_to_user_ll
  9        100.000  vmlinux                  __copy_to_user_ll [self]
-------------------------------------------------------------------------------


This means little to me, but what I understand from it, a lot of CPU is taken 
by libfb.so. Can I do something more to debug this?

My Xorg.0.log can be found at http://daan.homelinux.org/Xorg.0.log

Regards,

Daan de Beer