[mythtv-users] CPU performance for Atom on BE/FE

[David Watkins]

On 19 September 2011 00:30, Josu Lazkano <josu.lazkano at gmail.com> wrote:
> Hello again, I have some playback problem on a Nvidia ION based BE/FE,
> I am checking the VDPAU. But I read this post:
>
> http://www.mythtv.org/wiki/VDPAU#CPU_Frequency_Scaling
> https://bbs.archlinux.org/viewtopic.php?id=64564
>
> So I want to know if I need and extra configuration on my CPU to
> better performance. This is my CPU:

I haven't needed to disable the CPU stepping.

I have the same motherboard, and your cpuinfo looks identical to mine
(actually you have 0.07 MHz and 0.14 bogomips more that me)

I have 2GB of RAM of which 512MB is allocated in the BIOS to the graphics.

Using nvidia driver 260.19.44-133 I have no HD playback problems using
VDPAU-Normal playback profile.

Hope this data-point helps, and good luck.

>
> $ cat /proc/cpuinfo
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 28
> model name      : Intel(R) Atom(TM) CPU  330   @ 1.60GHz
> stepping        : 2
> cpu MHz         : 1600.067
> cache size      : 512 KB
> physical id     : 0
> siblings        : 4
> core id         : 0
> cpu cores       : 2
> apicid          : 0
> initial apicid  : 0
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc
> arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3
> cx16 xtpr pdcm movbe lahf_lm
> bogomips        : 3200.13
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 32 bits physical, 48 bits virtual
> power management:
>
> processor       : 1
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 28
> model name      : Intel(R) Atom(TM) CPU  330   @ 1.60GHz
> stepping        : 2
> cpu MHz         : 1600.067
> cache size      : 512 KB
> physical id     : 0
> siblings        : 4
> core id         : 1
> cpu cores       : 2
> apicid          : 2
> initial apicid  : 2
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc
> arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3
> cx16 xtpr pdcm movbe lahf_lm
> bogomips        : 3199.96
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 32 bits physical, 48 bits virtual
> power management:
>
> processor       : 2
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 28
> model name      : Intel(R) Atom(TM) CPU  330   @ 1.60GHz
> stepping        : 2
> cpu MHz         : 1600.067
> cache size      : 512 KB
> physical id     : 0
> siblings        : 4
> core id         : 0
> cpu cores       : 2
> apicid          : 1
> initial apicid  : 1
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc
> arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3
> cx16 xtpr pdcm movbe lahf_lm
> bogomips        : 3199.93
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 32 bits physical, 48 bits virtual
> power management:
>
> processor       : 3
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 28
> model name      : Intel(R) Atom(TM) CPU  330   @ 1.60GHz
> stepping        : 2
> cpu MHz         : 1600.067
> cache size      : 512 KB
> physical id     : 0
> siblings        : 4
> core id         : 1
> cpu cores       : 2
> apicid          : 3
> initial apicid  : 3
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc
> arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3
> cx16 xtpr pdcm movbe lahf_lm
> bogomips        : 3199.94
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 32 bits physical, 48 bits virtual
> power management:
>
> Is preferable to disable the CPU stepping?
>
> I will appreciate your help. Maybe this is the cause for the playback.
>
> Kind regards.
>
> --
> Josu Lazkano
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