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

Mon Sep 19 09:45:15 UTC 2011

2011/9/19 David Watkins <watkinshome at gmail.com>:
> 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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>>
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Thanks David, I have too 512MB dual-channel for my card with latest
drivers (280.13).

Maybe there is an other problem with my system. I spend lots of time
this weekend with this.

I notice that if a get a little stop on the playback and I go back
(Rewind), the error is reproduced again (there is a stop again). This
means that the problem is not the playback?

Thanks and best regards.

-- 
Josu Lazkano